Head-to-head comparison

Muse Spark 1.3 vs. DeepSeek-V4-Flash

Compare published benchmark results from matching versions and cohorts, API pricing, and technical specifications. Any documented test setup differences remain visible.

shared result series: 75
distinct benchmarks: 11
latest retrieval: 2026-10-15

First modelSecond model

Specifications

General specifications

Release date, availability, context window, architecture, and published parameter counts at a glance. Undisclosed details remain marked as unavailable.

Specifications for Muse Spark 1.3 and DeepSeek-V4-Flash
Attribute	Muse Spark 1.3	DeepSeek-V4-Flash
Provider	Meta	DeepSeek
Released	Sep 2, 2026	Apr 24, 2026
Availability	Active	Limited access
Model type	Proprietary	Open Weights
Parameters	Not published	284B, 13B active
Architecture	Not published	Mixture of Experts
Context window	1,048,576 tokens	1,000,000 tokens
Knowledge cutoff	Not published	Not published
Technical sources	Model, Context	Model

Pricing

API pricing compared

The table compares official standard API rates per 1M tokens, including published cache pricing. Batch, fast, priority, regional surcharges, tool calls, and cloud platform pricing are excluded.

API pricing for Muse Spark 1.3 and DeepSeek-V4-Flash
Price type	Muse Spark 1.3	DeepSeek-V4-Flash
API input	$1.25	$0.14
API output	$4.25	$0.28
Cache read	$0.15	Not listed
Cache write (5 min.)	Not listed	Not listed
Cache write (1 hr.)	Not listed	Not listed
Price verified	10/18/2026 Source	10/18/2026 Source

Muse Spark 1.3DeepSeek-V4-Flash

API inputUSD per 1M tokens, base tier

Muse Spark 1.3$1.25

DeepSeek-V4-Flash$0.14

API outputUSD per 1M tokens, base tier

Muse Spark 1.3$4.25

DeepSeek-V4-Flash$0.28

Key to the marks:better valuebetter, but not conclusivetie

Pricing by provider

Direct developer pricing and provider endpoint tariffs routed through OpenRouter are listed separately. Prices are in USD per 1M tokens. Context-dependent direct tiers plus regional, Flex, Priority, and other OpenRouter tariffs remain individually identifiable.

Provider pricing for Muse Spark 1.3 and DeepSeek-V4-Flash
Model	Provider	Purchase route and tariff	Input per 1M tokens	Output per 1M tokens	Source
Muse Spark 1.3	Meta	Via OpenRoutermeta	Lowest listed price: $1.25	Lowest listed price: $4.25	Source10/18/2026
DeepSeek-V4-Flash	Alibaba	Via OpenRouteralibaba	$0.352	$1.056	Source10/18/2026
	Alibaba	Via OpenRouteralibaba/us-east-1	$0.374	$1.122	Source10/18/2026
	AtlasCloud	Via OpenRouteratlas-cloud/fp4	$0.44	$1.32	Source10/18/2026
	Baidu	Via OpenRouterbaidu/fp8	$0.0598	$0.1795	Source10/18/2026
	BaseTen	Via OpenRouterbaseten/fp32	$0.13	$0.26	Source10/18/2026
	BaseTen	Via OpenRouterbaseten/fp8	$0.13	$0.26	Source10/18/2026
	Cloudflare	Via OpenRoutercloudflare	$0.44	$1.32	Source10/18/2026
	Cohere	Via OpenRoutercohere	$0.14	$0.28	Source10/18/2026
	CoreWeave	Via OpenRoutercoreweave/fp8	$0.13	$0.28	Source10/18/2026
	DeepInfra	Via OpenRouterdeepinfra/fp8	$0.06	$0.18	Source10/18/2026
	DigitalOcean	Via OpenRouterdigitalocean	$0.119	$0.238	Source10/18/2026
	GMICloud	Via OpenRoutergmicloud/fp8	$0.286	$0.858	Source10/18/2026
	Inceptron	Via OpenRouterinceptron/fp4	$0.13	$0.4782	Source10/18/2026
	Mancer 2	Via OpenRoutermancer/fp8	$0.2	$0.6	Source10/18/2026
	Novita	Via OpenRouternovita/fp8	$0.4092	$1.2276	Source10/18/2026
	OpenInference	Via OpenRouteropen-inference/fp4	Lowest listed price: $0.0091	Lowest listed price: $0.1436	Source10/18/2026
	Parasail	Via OpenRouterparasail/fp8	$0.14	$0.28	Source10/18/2026
	Phala	Via OpenRouterphala	$0.308	$0.924	Source10/18/2026
	Reka	Via OpenRouterreka	$0.021	$0.528	Source10/18/2026
	Relace	Via OpenRouterrelace/fp4	$0.0114	$1.28	Source10/18/2026
	Sail Research	Via OpenRoutersail-research/fp4	$0.1	$0.3	Source10/18/2026
	Sail Research	Via OpenRoutersail-research/us	$0.1	$0.3	Source10/18/2026
	SiliconFlow	Via OpenRoutersiliconflow/fp8	$0.22	$0.66	Source10/18/2026
	StreamLake	Via OpenRouterstreamlake/fp8	$0.088	$0.264	Source10/18/2026
	Together	Via OpenRoutertogether	$0.14	$0.28	Source10/18/2026
	Venice	Via OpenRoutervenice	$0.13	$0.26	Source10/18/2026
	Wafer	Via OpenRouterwafer/fast	$0.13	$0.23	Source10/18/2026

Performance

Shared benchmarks

Only published results with the same benchmark version, task, metric, and comparison cohort are paired. Different reasoning levels, agents, harnesses, or output limits appear directly in the table.

Capability profile from matched benchmarks

Each axis averages directly matched benchmark families. A value of 100 means the stronger value within this pair, not a universal quality score.

Muse Spark 1.3

DeepSeek-V4-Flash

Coding: 100 / 36.4 (1 benchmark family)

Reasoning: 100 / 72.2 (3 benchmark families)

Knowledge: 100 / 0 (1 benchmark family)

Agentic tasks: 100 / 86.1 (3 benchmark families)

Overall: 100 / 71.4 (1 benchmark family)

9 matched rows from 9 benchmark families were considered. The radar shows 5 of 5 comparable categories.

Muse Spark 1.3DeepSeek-V4-Flash

AA-BriefcaseOverall. Higher is better. No documented setup difference

Muse Spark 1.31,581.34 elo

DeepSeek-V4-Flash1,258.64 elo

AA-LCROverall. Higher is better. No documented setup difference

Muse Spark 1.383.0%

DeepSeek-V4-Flash79.7%

AA-OmniscienceOverall. Higher is better. No documented setup difference

Muse Spark 1.325 points

DeepSeek-V4-Flash-14.283 points

Artificial Analysis Intelligence IndexOverall. Higher is better. No documented setup difference

Muse Spark 1.348.092 points

DeepSeek-V4-Flash34.331 points

AutomationBench-AAOverall. Higher is better. No documented setup difference

Muse Spark 1.357.9%

DeepSeek-V4-Flash54.0%

GDP.pdfOverall. Higher is better. No documented setup difference

Muse Spark 1.326.6%

DeepSeek-V4-Flash11.0%

GDPval-AAOverall. Higher is better. No documented setup difference

Muse Spark 1.31,680.99 elo

DeepSeek-V4-Flash1,433.74 elo

Humanity's Last ExamOverall. Higher is better. No documented setup difference

Muse Spark 1.348.7%

DeepSeek-V4-Flash38.6%

LMArena Code Arena WebDevOverall. Higher is better. Test setup not documented as identical

Muse Spark 1.31,621.927

DeepSeek-V4-Flash1,430.632

LMArena Text, Style ControlOverall. Higher is better. Test setup not documented as identical

Muse Spark 1.31,494.213

DeepSeek-V4-Flash1,435.976

Terminal-BenchOverall. Higher is better. No documented setup difference

Muse Spark 1.333.3%

DeepSeek-V4-Flash12.1%

LMArena Code Arena WebDevOverall. Higher is better. Test setup not documented as identical

Muse Spark 1.31,658.54

DeepSeek-V4-Flash1,430.632

Key to the marks:better valuebetter, but not conclusivetie

Our model tests

Our tests

SVG short test

One SVG prompt and fixed output settings. Captures are shown only with 0 reported reasoning tokens or documented lack of reasoning controls. Identical test conditions do not make the models' internal compute identical.

Shared test round: 4ae5d8eeb9a9

Muse Spark 1.3

Unavailable in this round

DeepSeek-V4-Flash

API request failed. The model was not evaluated.

Earlier tests

Pelican on a bicycle

A community classic for free-form SVG drawing.

Muse Spark 1.3

Reasoning (requested): high

Current attempt

Run date: Oct 2, 2026
API provider: openrouter
Requested API model: meta/muse-spark-1.3
API model reported in response: meta/muse-spark-1.3
Reasoning setting: high
Pinned endpoint: Meta | meta/muse-spark-1.3-20260902
Temperature: Provider default
Token limit including reasoning: 8,192 tokens
Test protocol: community-visual-tests-v1
Technical checks: Passed, not a quality rating
Response time: 87.9 s

Visually reviewed. This individual test does not establish overall model quality.

Earlier attempts (2)

Oct 1, 2026Output withheld for safetyReasoning setting: high
Sep 7, 2026API request failedReasoning setting: high

DeepSeek-V4-Flash

The response reached the token limit. No complete recording is available.

Reasoning (requested): high

Current attempt

Run date: Oct 5, 2026
API provider: openrouter
Requested API model: deepseek/deepseek-v4-flash-0731
API model reported in response: deepseek/deepseek-v4-flash-0731
Reasoning setting: high
Pinned endpoint: StreamLake | deepseek/deepseek-v4-flash-20260731
Temperature: Provider default
Token limit including reasoning: 8,192 tokens
Test protocol: community-visual-tests-v1
Technical checks: Failed
Response time: 97.8 s

Not yet visually reviewed. A successful recording does not confirm correct physics or full compliance with the prompt.

Earlier attempts (3)

Oct 2, 2026API request failedReasoning setting: high
Oct 1, 2026API request failedReasoning setting: high
Sep 7, 2026API request failedReasoning setting: high

Prompt and test conditions

Generate an SVG of a pelican riding a bicycle

Token limit including reasoning: 8,192 tokens

Task origin (Simon Willison)

How to read this comparison

Winning one benchmark is not an overall verdict

Your workload, budget, and required context length matter most. A coding benchmark says little about visual understanding or agent performance.

The standard price table uses direct developer rates. The provider comparison labels OpenRouter endpoints, regions, and special tariffs separately.

Every result links to its measurement source and retrieval date. Labels distinguish vendor reports, official benchmark leaderboards, and independent evaluations. Disputed or archived results are excluded.

More matchups

Compare Muse Spark 1.3 and DeepSeek-V4-Flash with other leading models using the same data and benchmark logic.

View the complete LLM comparison

Benchmark scores for Muse Spark 1.3 and DeepSeek-V4-Flash
Benchmark and task	Muse Spark 1.3	DeepSeek-V4-Flash	Source
AA-BriefcaseOverall Test details No documented difference in the test setupVersion: v1.1Metric: AA-Briefcase EloScoring: Higher is betterMuse Spark 1.3: Snapshot: Muse Spark 1.3 (Max), Reasoning: Max DeepSeek-V4-Flash: Snapshot: DeepSeek V4 Flash 0731 (Max), Reasoning: MaxMuse Spark 1.3: Exact AA configuration: Muse Spark 1.3 (Max) (release muse-spark-1-3, row muse-spark-1-3, UUID 9999672c-b687-4026-9c15-5cef02ff53bb, reasoning=true, source reasoning-token configuration budget=2000, suffix=Max). This configured value is not measured token consumption.DeepSeek-V4-Flash: Exact AA configuration: DeepSeek V4 Flash 0731 (Max) (release deepseek-v4-flash, row deepseek-v4-flash, UUID fe4c0848-e284-4e52-a79d-cdc28392f1a9, reasoning=true, source reasoning-token configuration budget=2000, suffix=Max). This configured value is not measured token consumption.	Winner1,581.34 elo	1,258.64 elo	Artificial Analysis Source details Data as of: 10/15/2026
AA-LCROverall Test details No documented difference in the test setupVersion: v1.1Metric: Pass rateScoring: Higher is betterMuse Spark 1.3: Snapshot: Muse Spark 1.3 (Max), Reasoning: Max DeepSeek-V4-Flash: Snapshot: DeepSeek V4 Flash 0731 (Max), Reasoning: MaxMuse Spark 1.3: Exact AA configuration: Muse Spark 1.3 (Max) (release muse-spark-1-3, row muse-spark-1-3, UUID 9999672c-b687-4026-9c15-5cef02ff53bb, reasoning=true, source reasoning-token configuration budget=2000, suffix=Max). This configured value is not measured token consumption.DeepSeek-V4-Flash: Exact AA configuration: DeepSeek V4 Flash 0731 (Max) (release deepseek-v4-flash, row deepseek-v4-flash, UUID fe4c0848-e284-4e52-a79d-cdc28392f1a9, reasoning=true, source reasoning-token configuration budget=2000, suffix=Max). This configured value is not measured token consumption.	Winner83.0%	79.7%	Artificial Analysis Source details Data as of: 10/15/2026
AA-OmniscienceOverall Test details No documented difference in the test setupVersion: unspecifiedMetric: AA-Omniscience IndexScoring: Higher is betterMuse Spark 1.3: Snapshot: Muse Spark 1.3 (Max), Reasoning: Max DeepSeek-V4-Flash: Snapshot: DeepSeek V4 Flash 0731 (Max), Reasoning: MaxMuse Spark 1.3: Exact AA configuration: Muse Spark 1.3 (Max) (release muse-spark-1-3, row muse-spark-1-3, UUID 9999672c-b687-4026-9c15-5cef02ff53bb, reasoning=true, source reasoning-token configuration budget=2000, suffix=Max). This configured value is not measured token consumption.DeepSeek-V4-Flash: Exact AA configuration: DeepSeek V4 Flash 0731 (Max) (release deepseek-v4-flash, row deepseek-v4-flash, UUID fe4c0848-e284-4e52-a79d-cdc28392f1a9, reasoning=true, source reasoning-token configuration budget=2000, suffix=Max). This configured value is not measured token consumption.	Winner25 points The index can be negative and ranges from -100 to 100 according to Artificial Analysis.	-14.283 points The index can be negative and ranges from -100 to 100 according to Artificial Analysis.	Artificial Analysis Source details Data as of: 10/15/2026
Artificial Analysis Intelligence IndexOverall Test details No documented difference in the test setupVersion: v4.3.2Metric: Artificial Analysis Intelligence IndexScoring: Higher is betterMuse Spark 1.3: Snapshot: Muse Spark 1.3 (Max), Reasoning: Max DeepSeek-V4-Flash: Snapshot: DeepSeek V4 Flash 0731 (Max), Reasoning: MaxMuse Spark 1.3: Exact AA configuration: Muse Spark 1.3 (Max) (release muse-spark-1-3, row muse-spark-1-3, UUID 9999672c-b687-4026-9c15-5cef02ff53bb, reasoning=true, source reasoning-token configuration budget=2000, suffix=Max). This configured value is not measured token consumption.DeepSeek-V4-Flash: Exact AA configuration: DeepSeek V4 Flash 0731 (Max) (release deepseek-v4-flash, row deepseek-v4-flash, UUID fe4c0848-e284-4e52-a79d-cdc28392f1a9, reasoning=true, source reasoning-token configuration budget=2000, suffix=Max). This configured value is not measured token consumption.	Winner48.092 points	34.331 points	Artificial Analysis Source details Data as of: 10/15/2026
AutomationBench-AAOverall Test details No documented difference in the test setupVersion: unspecifiedMetric: Objectives completed without guardrail violationsScoring: Higher is betterMuse Spark 1.3: Snapshot: Muse Spark 1.3 (Max), Reasoning: Max DeepSeek-V4-Flash: Snapshot: DeepSeek V4 Flash 0731 (Max), Reasoning: MaxMuse Spark 1.3: Exact AA configuration: Muse Spark 1.3 (Max) (release muse-spark-1-3, row muse-spark-1-3, UUID 9999672c-b687-4026-9c15-5cef02ff53bb, reasoning=true, source reasoning-token configuration budget=2000, suffix=Max). This configured value is not measured token consumption.DeepSeek-V4-Flash: Exact AA configuration: DeepSeek V4 Flash 0731 (Max) (release deepseek-v4-flash, row deepseek-v4-flash, UUID fe4c0848-e284-4e52-a79d-cdc28392f1a9, reasoning=true, source reasoning-token configuration budget=2000, suffix=Max). This configured value is not measured token consumption.	Winner57.9%	54.0%	Artificial Analysis Source details Data as of: 10/15/2026
GDP.pdfOverall Test details No documented difference in the test setupVersion: unspecifiedMetric: All-pass rateScoring: Higher is betterMuse Spark 1.3: Snapshot: Muse Spark 1.3 (Max), Reasoning: Max DeepSeek-V4-Flash: Snapshot: DeepSeek V4 Flash 0731 (Max), Reasoning: MaxMuse Spark 1.3: Exact AA configuration: Muse Spark 1.3 (Max) (release muse-spark-1-3, row muse-spark-1-3, UUID 9999672c-b687-4026-9c15-5cef02ff53bb, reasoning=true, source reasoning-token configuration budget=2000, suffix=Max). This configured value is not measured token consumption.DeepSeek-V4-Flash: Exact AA configuration: DeepSeek V4 Flash 0731 (Max) (release deepseek-v4-flash, row deepseek-v4-flash, UUID fe4c0848-e284-4e52-a79d-cdc28392f1a9, reasoning=true, source reasoning-token configuration budget=2000, suffix=Max). This configured value is not measured token consumption.	Winner26.6%	11.0%	Artificial Analysis Source details Data as of: 10/15/2026
GDPval-AAOverall Test details No documented difference in the test setupVersion: v2.1Metric: GDPval-AA EloScoring: Higher is betterMuse Spark 1.3: Snapshot: Muse Spark 1.3 (Max), Reasoning: Max DeepSeek-V4-Flash: Snapshot: DeepSeek V4 Flash 0731 (Max), Reasoning: MaxMuse Spark 1.3: Exact AA configuration: Muse Spark 1.3 (Max) (release muse-spark-1-3, row muse-spark-1-3, UUID 9999672c-b687-4026-9c15-5cef02ff53bb, reasoning=true, source reasoning-token configuration budget=2000, suffix=Max). This configured value is not measured token consumption.DeepSeek-V4-Flash: Exact AA configuration: DeepSeek V4 Flash 0731 (Max) (release deepseek-v4-flash, row deepseek-v4-flash, UUID fe4c0848-e284-4e52-a79d-cdc28392f1a9, reasoning=true, source reasoning-token configuration budget=2000, suffix=Max). This configured value is not measured token consumption.	Winner1,680.99 elo	1,433.74 elo	Artificial Analysis Source details Data as of: 10/15/2026
Humanity's Last ExamOverall Test details No documented difference in the test setupVersion: unspecifiedMetric: Text-only pass@1 accuracyScoring: Higher is betterMuse Spark 1.3: Snapshot: Muse Spark 1.3 (Max), Reasoning: Max DeepSeek-V4-Flash: Snapshot: DeepSeek V4 Flash 0731 (Max), Reasoning: MaxMuse Spark 1.3: Exact AA configuration: Muse Spark 1.3 (Max) (release muse-spark-1-3, row muse-spark-1-3, UUID 9999672c-b687-4026-9c15-5cef02ff53bb, reasoning=true, source reasoning-token configuration budget=2000, suffix=Max). This configured value is not measured token consumption.DeepSeek-V4-Flash: Exact AA configuration: DeepSeek V4 Flash 0731 (Max) (release deepseek-v4-flash, row deepseek-v4-flash, UUID fe4c0848-e284-4e52-a79d-cdc28392f1a9, reasoning=true, source reasoning-token configuration budget=2000, suffix=Max). This configured value is not measured token consumption.	Winner48.7% Artificial Analysis describes this comparable run as 2,158 text-only questions, not the full 2,500-question dataset.	38.6% Artificial Analysis describes this comparable run as 2,158 text-only questions, not the full 2,500-question dataset.	Artificial Analysis Source details Data as of: 10/15/2026
LMArena Code Arena WebDevOverall Test details Test setup not documented as identicalNo direct winnerVersion: webdevMetric: WebDev Arena Bradley-Terry ratingScoring: Higher is betterMuse Spark 1.3: Snapshot: muse-spark-1.3 (xHigh), Reasoning: xhigh, Harness: Arena Code Arena WebDev DeepSeek-V4-Flash: Snapshot: deepseek-v4-flash-high-preview, Reasoning: high, Harness: Arena Code Arena WebDevMuse Spark 1.3: Arena rating from 7,987 published pairwise votes.DeepSeek-V4-Flash: Arena rating from 10,152 published pairwise votes.	Higher measured value1,621.927 95% confidence interval: ±8.096The Arena score measures human preference rather than a fixed capability test. The confidence interval, Arena category, and model configuration are part of the result.	1,430.632 95% confidence interval: ±6.942The Arena score measures human preference rather than a fixed capability test. The confidence interval, Arena category, and model configuration are part of the result.	LMArena Source details Data as of: 10/13/2026
LMArena Text, Style ControlOverall Test details Test setup not documented as identicalNo direct winnerVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterMuse Spark 1.3: Snapshot: muse-spark-1.3-max, Reasoning: max, Harness: Arena Text, style control DeepSeek-V4-Flash: Snapshot: deepseek-v4-flash, Harness: Arena Text, style controlMuse Spark 1.3: Arena rating from 16,731 published pairwise votes.DeepSeek-V4-Flash: Arena rating from 52,016 published pairwise votes.	Higher measured value1,494.213 95% confidence interval: ±5.665The Arena score measures human preference rather than a fixed capability test. The confidence interval, Arena category, and model configuration are part of the result.	1,435.976 95% confidence interval: ±4.036The Arena score measures human preference rather than a fixed capability test. The confidence interval, Arena category, and model configuration are part of the result.	LMArena Source details Data as of: 10/13/2026
Terminal-BenchOverall Test details No documented difference in the test setupVersion: 4.0Metric: Task successScoring: Higher is betterMuse Spark 1.3: Snapshot: Muse Spark 1.3 (Max), Reasoning: Max DeepSeek-V4-Flash: Snapshot: DeepSeek V4 Flash 0731 (Max), Reasoning: MaxMuse Spark 1.3: Exact AA configuration: Muse Spark 1.3 (Max) (release muse-spark-1-3, row muse-spark-1-3, UUID 9999672c-b687-4026-9c15-5cef02ff53bb, reasoning=true, source reasoning-token configuration budget=2000, suffix=Max). This configured value is not measured token consumption.DeepSeek-V4-Flash: Exact AA configuration: DeepSeek V4 Flash 0731 (Max) (release deepseek-v4-flash, row deepseek-v4-flash, UUID fe4c0848-e284-4e52-a79d-cdc28392f1a9, reasoning=true, source reasoning-token configuration budget=2000, suffix=Max). This configured value is not measured token consumption.	Winner33.3%	12.1%	Artificial Analysis Source details Data as of: 10/15/2026
LMArena Code Arena WebDevOverall Test details Test setup not documented as identicalNo direct winnerVersion: webdevMetric: WebDev Arena Bradley-Terry ratingScoring: Higher is betterMuse Spark 1.3: Snapshot: muse-spark-1.3-max, Reasoning: max, Harness: Arena Code Arena WebDev DeepSeek-V4-Flash: Snapshot: deepseek-v4-flash-high-preview, Reasoning: high, Harness: Arena Code Arena WebDevMuse Spark 1.3: Arena rating from 8,683 published pairwise votes.DeepSeek-V4-Flash: Arena rating from 10,152 published pairwise votes.	Higher measured value1,658.54 95% confidence interval: ±8.09The Arena score measures human preference rather than a fixed capability test. The confidence interval, Arena category, and model configuration are part of the result.	1,430.632 95% confidence interval: ±6.942The Arena score measures human preference rather than a fixed capability test. The confidence interval, Arena category, and model configuration are part of the result.	LMArena Source details Data as of: 10/13/2026
LMArena Text, Style ControlOverall Test details Test setup not documented as identicalNo direct winnerVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterMuse Spark 1.3: Snapshot: muse-spark-1.3-max, Reasoning: max, Harness: Arena Text, style control DeepSeek-V4-Flash: Snapshot: deepseek-v4-flash-high-preview, Reasoning: high, Harness: Arena Text, style controlMuse Spark 1.3: Arena rating from 16,731 published pairwise votes.DeepSeek-V4-Flash: Arena rating from 51,814 published pairwise votes.	Higher measured value1,494.213 95% confidence interval: ±5.665The Arena score measures human preference rather than a fixed capability test. The confidence interval, Arena category, and model configuration are part of the result.	1,438.654 95% confidence interval: ±4.106The Arena score measures human preference rather than a fixed capability test. The confidence interval, Arena category, and model configuration are part of the result.	LMArena Source details Data as of: 10/13/2026
LMArena Code Arena WebDevWebdev Test details Test setup not documented as identicalNo direct winnerVersion: webdevMetric: WebDev Arena Bradley-Terry ratingScoring: Higher is betterMuse Spark 1.3: Snapshot: muse-spark-1.3 (xHigh), Reasoning: xhigh, Harness: Arena Code Arena WebDev DeepSeek-V4-Flash: Snapshot: deepseek-v4-flash-high-preview, Reasoning: high, Harness: Arena Code Arena WebDevMuse Spark 1.3: Arena rating from 7,987 published pairwise votes.DeepSeek-V4-Flash: Arena rating from 10,152 published pairwise votes.	Higher measured value1,621.927 95% confidence interval: ±8.096The Arena score measures human preference rather than a fixed capability test. The confidence interval, Arena category, and model configuration are part of the result.	1,430.632 95% confidence interval: ±6.942The Arena score measures human preference rather than a fixed capability test. The confidence interval, Arena category, and model configuration are part of the result.	LMArena Source details Data as of: 10/13/2026
LMArena Text, Style ControlBusiness, management and finance Test details Test setup not documented as identicalNo direct winnerVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterMuse Spark 1.3: Snapshot: muse-spark-1.3-max, Reasoning: max, Harness: Arena Text, style control DeepSeek-V4-Flash: Snapshot: deepseek-v4-flash, Harness: Arena Text, style controlMuse Spark 1.3: Arena rating from 3,041 published pairwise votes.DeepSeek-V4-Flash: Arena rating from 10,448 published pairwise votes.	Higher measured value1,503.61 95% confidence interval: ±11.102The Arena score measures human preference rather than a fixed capability test. The confidence interval, Arena category, and model configuration are part of the result.	1,438.829 95% confidence interval: ±6.961The Arena score measures human preference rather than a fixed capability test. The confidence interval, Arena category, and model configuration are part of the result.	LMArena Source details Data as of: 10/13/2026
LMArena Code Arena WebDevWebdev Test details Test setup not documented as identicalNo direct winnerVersion: webdevMetric: WebDev Arena Bradley-Terry ratingScoring: Higher is betterMuse Spark 1.3: Snapshot: muse-spark-1.3-max, Reasoning: max, Harness: Arena Code Arena WebDev DeepSeek-V4-Flash: Snapshot: deepseek-v4-flash-high-preview, Reasoning: high, Harness: Arena Code Arena WebDevMuse Spark 1.3: Arena rating from 8,683 published pairwise votes.DeepSeek-V4-Flash: Arena rating from 10,152 published pairwise votes.	Higher measured value1,658.54 95% confidence interval: ±8.09The Arena score measures human preference rather than a fixed capability test. The confidence interval, Arena category, and model configuration are part of the result.	1,430.632 95% confidence interval: ±6.942The Arena score measures human preference rather than a fixed capability test. The confidence interval, Arena category, and model configuration are part of the result.	LMArena Source details Data as of: 10/13/2026
LMArena Text, Style ControlBusiness, management and finance Test details Test setup not documented as identicalNo direct winnerVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterMuse Spark 1.3: Snapshot: muse-spark-1.3-max, Reasoning: max, Harness: Arena Text, style control DeepSeek-V4-Flash: Snapshot: deepseek-v4-flash-high-preview, Reasoning: high, Harness: Arena Text, style controlMuse Spark 1.3: Arena rating from 3,041 published pairwise votes.DeepSeek-V4-Flash: Arena rating from 10,643 published pairwise votes.	Higher measured value1,503.61 95% confidence interval: ±11.102The Arena score measures human preference rather than a fixed capability test. The confidence interval, Arena category, and model configuration are part of the result.	1,434.084 95% confidence interval: ±6.963The Arena score measures human preference rather than a fixed capability test. The confidence interval, Arena category, and model configuration are part of the result.	LMArena Source details Data as of: 10/13/2026
LMArena Code Arena WebDevWebdev-html Test details Test setup not documented as identicalNo direct winnerVersion: webdevMetric: WebDev Arena Bradley-Terry ratingScoring: Higher is betterMuse Spark 1.3: Snapshot: muse-spark-1.3 (xHigh), Reasoning: xhigh, Harness: Arena Code Arena WebDev DeepSeek-V4-Flash: Snapshot: deepseek-v4-flash-high-preview, Reasoning: high, Harness: Arena Code Arena WebDevMuse Spark 1.3: Arena rating from 1,195 published pairwise votes.DeepSeek-V4-Flash: Arena rating from 1,165 published pairwise votes.	Higher measured value1,627.36 95% confidence interval: ±19.007The Arena score measures human preference rather than a fixed capability test. The confidence interval, Arena category, and model configuration are part of the result.	1,416.219 95% confidence interval: ±18.033The Arena score measures human preference rather than a fixed capability test. The confidence interval, Arena category, and model configuration are part of the result.	LMArena Source details Data as of: 10/13/2026
LMArena Text, Style ControlChinese Test details Test setup not documented as identicalNo direct winnerVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterMuse Spark 1.3: Snapshot: muse-spark-1.3-max, Reasoning: max, Harness: Arena Text, style control DeepSeek-V4-Flash: Snapshot: deepseek-v4-flash, Harness: Arena Text, style controlMuse Spark 1.3: Arena rating from 1,298 published pairwise votes.DeepSeek-V4-Flash: Arena rating from 3,005 published pairwise votes.	Higher measured value1,529.417 95% confidence interval: ±16.859The Arena score measures human preference rather than a fixed capability test. The confidence interval, Arena category, and model configuration are part of the result.	1,470.018 95% confidence interval: ±11.382The Arena score measures human preference rather than a fixed capability test. The confidence interval, Arena category, and model configuration are part of the result.	LMArena Source details Data as of: 10/13/2026
LMArena Code Arena WebDevWebdev-html Test details Test setup not documented as identicalNo direct winnerVersion: webdevMetric: WebDev Arena Bradley-Terry ratingScoring: Higher is betterMuse Spark 1.3: Snapshot: muse-spark-1.3-max, Reasoning: max, Harness: Arena Code Arena WebDev DeepSeek-V4-Flash: Snapshot: deepseek-v4-flash-high-preview, Reasoning: high, Harness: Arena Code Arena WebDevMuse Spark 1.3: Arena rating from 1,196 published pairwise votes.DeepSeek-V4-Flash: Arena rating from 1,165 published pairwise votes.	Higher measured value1,657.124 95% confidence interval: ±19.59The Arena score measures human preference rather than a fixed capability test. The confidence interval, Arena category, and model configuration are part of the result.	1,416.219 95% confidence interval: ±18.033The Arena score measures human preference rather than a fixed capability test. The confidence interval, Arena category, and model configuration are part of the result.	LMArena Source details Data as of: 10/13/2026
LMArena Text, Style ControlChinese Test details Test setup not documented as identicalNo direct winnerVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterMuse Spark 1.3: Snapshot: muse-spark-1.3-max, Reasoning: max, Harness: Arena Text, style control DeepSeek-V4-Flash: Snapshot: deepseek-v4-flash-high-preview, Reasoning: high, Harness: Arena Text, style controlMuse Spark 1.3: Arena rating from 1,298 published pairwise votes.DeepSeek-V4-Flash: Arena rating from 2,975 published pairwise votes.	Higher measured value1,529.417 95% confidence interval: ±16.859The Arena score measures human preference rather than a fixed capability test. The confidence interval, Arena category, and model configuration are part of the result.	1,480.516 95% confidence interval: ±11.412The Arena score measures human preference rather than a fixed capability test. The confidence interval, Arena category, and model configuration are part of the result.	LMArena Source details Data as of: 10/13/2026
LMArena Code Arena WebDevWebdev-react Test details Test setup not documented as identicalNo direct winnerVersion: webdevMetric: WebDev Arena Bradley-Terry ratingScoring: Higher is betterMuse Spark 1.3: Snapshot: muse-spark-1.3 (xHigh), Reasoning: xhigh, Harness: Arena Code Arena WebDev DeepSeek-V4-Flash: Snapshot: deepseek-v4-flash-high-preview, Reasoning: high, Harness: Arena Code Arena WebDevMuse Spark 1.3: Arena rating from 5,098 published pairwise votes.DeepSeek-V4-Flash: Arena rating from 8,109 published pairwise votes.	Higher measured value1,630.932 95% confidence interval: ±9.812The Arena score measures human preference rather than a fixed capability test. The confidence interval, Arena category, and model configuration are part of the result.	1,421.593 95% confidence interval: ±7.665The Arena score measures human preference rather than a fixed capability test. The confidence interval, Arena category, and model configuration are part of the result.	LMArena Source details Data as of: 10/13/2026
LMArena Text, Style ControlCoding Test details Test setup not documented as identicalNo direct winnerVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterMuse Spark 1.3: Snapshot: muse-spark-1.3-max, Reasoning: max, Harness: Arena Text, style control DeepSeek-V4-Flash: Snapshot: deepseek-v4-flash, Harness: Arena Text, style controlMuse Spark 1.3: Arena rating from 4,357 published pairwise votes.DeepSeek-V4-Flash: Arena rating from 15,290 published pairwise votes.	Higher measured value1,536.661 95% confidence interval: ±9.472The Arena score measures human preference rather than a fixed capability test. The confidence interval, Arena category, and model configuration are part of the result.	1,484.301 95% confidence interval: ±6.214The Arena score measures human preference rather than a fixed capability test. The confidence interval, Arena category, and model configuration are part of the result.	LMArena Source details Data as of: 10/13/2026
LMArena Code Arena WebDevWebdev-react Test details Test setup not documented as identicalNo direct winnerVersion: webdevMetric: WebDev Arena Bradley-Terry ratingScoring: Higher is betterMuse Spark 1.3: Snapshot: muse-spark-1.3-max, Reasoning: max, Harness: Arena Code Arena WebDev DeepSeek-V4-Flash: Snapshot: deepseek-v4-flash-high-preview, Reasoning: high, Harness: Arena Code Arena WebDevMuse Spark 1.3: Arena rating from 5,603 published pairwise votes.DeepSeek-V4-Flash: Arena rating from 8,109 published pairwise votes.	Higher measured value1,670.223 95% confidence interval: ±9.509The Arena score measures human preference rather than a fixed capability test. The confidence interval, Arena category, and model configuration are part of the result.	1,421.593 95% confidence interval: ±7.665The Arena score measures human preference rather than a fixed capability test. The confidence interval, Arena category, and model configuration are part of the result.	LMArena Source details Data as of: 10/13/2026
LMArena Text, Style ControlCoding Test details Test setup not documented as identicalNo direct winnerVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterMuse Spark 1.3: Snapshot: muse-spark-1.3-max, Reasoning: max, Harness: Arena Text, style control DeepSeek-V4-Flash: Snapshot: deepseek-v4-flash-high-preview, Reasoning: high, Harness: Arena Text, style controlMuse Spark 1.3: Arena rating from 4,357 published pairwise votes.DeepSeek-V4-Flash: Arena rating from 15,245 published pairwise votes.	Higher measured value1,536.661 95% confidence interval: ±9.472The Arena score measures human preference rather than a fixed capability test. The confidence interval, Arena category, and model configuration are part of the result.	1,479.463 95% confidence interval: ±6.25The Arena score measures human preference rather than a fixed capability test. The confidence interval, Arena category, and model configuration are part of the result.	LMArena Source details Data as of: 10/13/2026
LMArena Text, Style ControlCreative writing Test details Test setup not documented as identicalNo direct winnerVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterMuse Spark 1.3: Snapshot: muse-spark-1.3-max, Reasoning: max, Harness: Arena Text, style control DeepSeek-V4-Flash: Snapshot: deepseek-v4-flash, Harness: Arena Text, style controlMuse Spark 1.3: Arena rating from 3,666 published pairwise votes.DeepSeek-V4-Flash: Arena rating from 8,595 published pairwise votes.	Higher measured value1,460.856 95% confidence interval: ±10.701The Arena score measures human preference rather than a fixed capability test. The confidence interval, Arena category, and model configuration are part of the result.	1,408.246 95% confidence interval: ±7.512The Arena score measures human preference rather than a fixed capability test. The confidence interval, Arena category, and model configuration are part of the result.	LMArena Source details Data as of: 10/13/2026
LMArena Text, Style ControlCreative writing Test details Test setup not documented as identicalNo direct winnerVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterMuse Spark 1.3: Snapshot: muse-spark-1.3-max, Reasoning: max, Harness: Arena Text, style control DeepSeek-V4-Flash: Snapshot: deepseek-v4-flash-high-preview, Reasoning: high, Harness: Arena Text, style controlMuse Spark 1.3: Arena rating from 3,666 published pairwise votes.DeepSeek-V4-Flash: Arena rating from 8,668 published pairwise votes.	Higher measured value1,460.856 95% confidence interval: ±10.701The Arena score measures human preference rather than a fixed capability test. The confidence interval, Arena category, and model configuration are part of the result.	1,410.845 95% confidence interval: ±7.548The Arena score measures human preference rather than a fixed capability test. The confidence interval, Arena category, and model configuration are part of the result.	LMArena Source details Data as of: 10/13/2026
LMArena Text, Style ControlEnglish Test details Test setup not documented as identicalNo direct winnerVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterMuse Spark 1.3: Snapshot: muse-spark-1.3-max, Reasoning: max, Harness: Arena Text, style control DeepSeek-V4-Flash: Snapshot: deepseek-v4-flash, Harness: Arena Text, style controlMuse Spark 1.3: Arena rating from 6,647 published pairwise votes.DeepSeek-V4-Flash: Arena rating from 23,136 published pairwise votes.	Higher measured value1,500.366 95% confidence interval: ±7.853The Arena score measures human preference rather than a fixed capability test. The confidence interval, Arena category, and model configuration are part of the result.	1,445.189 95% confidence interval: ±5.273The Arena score measures human preference rather than a fixed capability test. The confidence interval, Arena category, and model configuration are part of the result.	LMArena Source details Data as of: 10/13/2026
LMArena Text, Style ControlEnglish Test details Test setup not documented as identicalNo direct winnerVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterMuse Spark 1.3: Snapshot: muse-spark-1.3-max, Reasoning: max, Harness: Arena Text, style control DeepSeek-V4-Flash: Snapshot: deepseek-v4-flash-high-preview, Reasoning: high, Harness: Arena Text, style controlMuse Spark 1.3: Arena rating from 6,647 published pairwise votes.DeepSeek-V4-Flash: Arena rating from 23,022 published pairwise votes.	Higher measured value1,500.366 95% confidence interval: ±7.853The Arena score measures human preference rather than a fixed capability test. The confidence interval, Arena category, and model configuration are part of the result.	1,449.707 95% confidence interval: ±5.31The Arena score measures human preference rather than a fixed capability test. The confidence interval, Arena category, and model configuration are part of the result.	LMArena Source details Data as of: 10/13/2026
LMArena Text, Style ControlEntertainment, sports and media Test details Test setup not documented as identicalNo direct winnerVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterMuse Spark 1.3: Snapshot: muse-spark-1.3-max, Reasoning: max, Harness: Arena Text, style control DeepSeek-V4-Flash: Snapshot: deepseek-v4-flash, Harness: Arena Text, style controlMuse Spark 1.3: Arena rating from 4,323 published pairwise votes.DeepSeek-V4-Flash: Arena rating from 11,221 published pairwise votes.	Higher measured value1,457.32 95% confidence interval: ±9.849The Arena score measures human preference rather than a fixed capability test. The confidence interval, Arena category, and model configuration are part of the result.	1,404.55 95% confidence interval: ±6.918The Arena score measures human preference rather than a fixed capability test. The confidence interval, Arena category, and model configuration are part of the result.	LMArena Source details Data as of: 10/13/2026
LMArena Text, Style ControlEntertainment, sports and media Test details Test setup not documented as identicalNo direct winnerVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterMuse Spark 1.3: Snapshot: muse-spark-1.3-max, Reasoning: max, Harness: Arena Text, style control DeepSeek-V4-Flash: Snapshot: deepseek-v4-flash-high-preview, Reasoning: high, Harness: Arena Text, style controlMuse Spark 1.3: Arena rating from 4,323 published pairwise votes.DeepSeek-V4-Flash: Arena rating from 11,460 published pairwise votes.	Higher measured value1,457.32 95% confidence interval: ±9.849The Arena score measures human preference rather than a fixed capability test. The confidence interval, Arena category, and model configuration are part of the result.	1,407.781 95% confidence interval: ±6.873The Arena score measures human preference rather than a fixed capability test. The confidence interval, Arena category, and model configuration are part of the result.	LMArena Source details Data as of: 10/13/2026
LMArena Text, Style ControlExcluding ties Test details Test setup not documented as identicalNo direct winnerVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterMuse Spark 1.3: Snapshot: muse-spark-1.3-max, Reasoning: max, Harness: Arena Text, style control DeepSeek-V4-Flash: Snapshot: deepseek-v4-flash, Harness: Arena Text, style controlMuse Spark 1.3: Arena rating from 12,251 published pairwise votes.DeepSeek-V4-Flash: Arena rating from 39,351 published pairwise votes.	Higher measured value1,511.723 95% confidence interval: ±7.665The Arena score measures human preference rather than a fixed capability test. The confidence interval, Arena category, and model configuration are part of the result.	1,431.858 95% confidence interval: ±5.294The Arena score measures human preference rather than a fixed capability test. The confidence interval, Arena category, and model configuration are part of the result.	LMArena Source details Data as of: 10/13/2026
LMArena Text, Style ControlExcluding ties Test details Test setup not documented as identicalNo direct winnerVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterMuse Spark 1.3: Snapshot: muse-spark-1.3-max, Reasoning: max, Harness: Arena Text, style control DeepSeek-V4-Flash: Snapshot: deepseek-v4-flash-high-preview, Reasoning: high, Harness: Arena Text, style controlMuse Spark 1.3: Arena rating from 12,251 published pairwise votes.DeepSeek-V4-Flash: Arena rating from 39,449 published pairwise votes.	Higher measured value1,511.723 95% confidence interval: ±7.665The Arena score measures human preference rather than a fixed capability test. The confidence interval, Arena category, and model configuration are part of the result.	1,436.129 95% confidence interval: ±5.336The Arena score measures human preference rather than a fixed capability test. The confidence interval, Arena category, and model configuration are part of the result.	LMArena Source details Data as of: 10/13/2026
LMArena Text, Style ControlExpert prompts Test details Test setup not documented as identicalNo direct winnerVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterMuse Spark 1.3: Snapshot: muse-spark-1.3-max, Reasoning: max, Harness: Arena Text, style control DeepSeek-V4-Flash: Snapshot: deepseek-v4-flash, Harness: Arena Text, style controlMuse Spark 1.3: Arena rating from 1,858 published pairwise votes.DeepSeek-V4-Flash: Arena rating from 5,416 published pairwise votes.	Higher measured value1,529.392 95% confidence interval: ±13.935The Arena score measures human preference rather than a fixed capability test. The confidence interval, Arena category, and model configuration are part of the result.	1,457.085 95% confidence interval: ±8.727The Arena score measures human preference rather than a fixed capability test. The confidence interval, Arena category, and model configuration are part of the result.	LMArena Source details Data as of: 10/13/2026
LMArena Text, Style ControlExpert prompts Test details Test setup not documented as identicalNo direct winnerVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterMuse Spark 1.3: Snapshot: muse-spark-1.3-max, Reasoning: max, Harness: Arena Text, style control DeepSeek-V4-Flash: Snapshot: deepseek-v4-flash-high-preview, Reasoning: high, Harness: Arena Text, style controlMuse Spark 1.3: Arena rating from 1,858 published pairwise votes.DeepSeek-V4-Flash: Arena rating from 5,338 published pairwise votes.	Higher measured value1,529.392 95% confidence interval: ±13.935The Arena score measures human preference rather than a fixed capability test. The confidence interval, Arena category, and model configuration are part of the result.	1,466.764 95% confidence interval: ±8.816The Arena score measures human preference rather than a fixed capability test. The confidence interval, Arena category, and model configuration are part of the result.	LMArena Source details Data as of: 10/13/2026
LMArena Text, Style ControlFrench Test details Test setup not documented as identicalNo direct winnerVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterMuse Spark 1.3: Snapshot: muse-spark-1.3-max, Reasoning: max, Harness: Arena Text, style control DeepSeek-V4-Flash: Snapshot: deepseek-v4-flash, Harness: Arena Text, style controlMuse Spark 1.3: Arena rating from 514 published pairwise votes.DeepSeek-V4-Flash: Arena rating from 2,004 published pairwise votes.	Higher measured value1,529.441 95% confidence interval: ±27.044The Arena score measures human preference rather than a fixed capability test. The confidence interval, Arena category, and model configuration are part of the result.	1,449.161 95% confidence interval: ±14.911The Arena score measures human preference rather than a fixed capability test. The confidence interval, Arena category, and model configuration are part of the result.	LMArena Source details Data as of: 10/13/2026
LMArena Text, Style ControlFrench Test details Test setup not documented as identicalNo direct winnerVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterMuse Spark 1.3: Snapshot: muse-spark-1.3-max, Reasoning: max, Harness: Arena Text, style control DeepSeek-V4-Flash: Snapshot: deepseek-v4-flash-high-preview, Reasoning: high, Harness: Arena Text, style controlMuse Spark 1.3: Arena rating from 514 published pairwise votes.DeepSeek-V4-Flash: Arena rating from 1,957 published pairwise votes.	Higher measured value1,529.441 95% confidence interval: ±27.044The Arena score measures human preference rather than a fixed capability test. The confidence interval, Arena category, and model configuration are part of the result.	1,458.886 95% confidence interval: ±15.182The Arena score measures human preference rather than a fixed capability test. The confidence interval, Arena category, and model configuration are part of the result.	LMArena Source details Data as of: 10/13/2026
LMArena Text, Style ControlGerman Test details Test setup not documented as identicalNo direct winnerVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterMuse Spark 1.3: Snapshot: muse-spark-1.3-max, Reasoning: max, Harness: Arena Text, style control DeepSeek-V4-Flash: Snapshot: deepseek-v4-flash, Harness: Arena Text, style controlMuse Spark 1.3: Arena rating from 242 published pairwise votes.DeepSeek-V4-Flash: Arena rating from 841 published pairwise votes.	Higher measured value1,519.307 95% confidence interval: ±37.488The Arena score measures human preference rather than a fixed capability test. The confidence interval, Arena category, and model configuration are part of the result.	1,425.17 95% confidence interval: ±21.221The Arena score measures human preference rather than a fixed capability test. The confidence interval, Arena category, and model configuration are part of the result.	LMArena Source details Data as of: 10/13/2026
LMArena Text, Style ControlGerman Test details Test setup not documented as identicalNo direct winnerVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterMuse Spark 1.3: Snapshot: muse-spark-1.3-max, Reasoning: max, Harness: Arena Text, style control DeepSeek-V4-Flash: Snapshot: deepseek-v4-flash-high-preview, Reasoning: high, Harness: Arena Text, style controlMuse Spark 1.3: Arena rating from 242 published pairwise votes.DeepSeek-V4-Flash: Arena rating from 904 published pairwise votes.	Higher measured value1,519.307 95% confidence interval: ±37.488The Arena score measures human preference rather than a fixed capability test. The confidence interval, Arena category, and model configuration are part of the result.	1,433.291 95% confidence interval: ±20.525The Arena score measures human preference rather than a fixed capability test. The confidence interval, Arena category, and model configuration are part of the result.	LMArena Source details Data as of: 10/13/2026
LMArena Text, Style ControlHard prompts Test details Test setup not documented as identicalNo direct winnerVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterMuse Spark 1.3: Snapshot: muse-spark-1.3-max, Reasoning: max, Harness: Arena Text, style control DeepSeek-V4-Flash: Snapshot: deepseek-v4-flash, Harness: Arena Text, style controlMuse Spark 1.3: Arena rating from 10,873 published pairwise votes.DeepSeek-V4-Flash: Arena rating from 34,789 published pairwise votes.	Higher measured value1,515.521 95% confidence interval: ±6.697The Arena score measures human preference rather than a fixed capability test. The confidence interval, Arena category, and model configuration are part of the result.	1,459.087 95% confidence interval: ±4.755The Arena score measures human preference rather than a fixed capability test. The confidence interval, Arena category, and model configuration are part of the result.	LMArena Source details Data as of: 10/13/2026

Muse Spark 1.3 vs. DeepSeek-V4-Flash

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