Head-to-head comparison

Muse Spark 1.3 vs. Kimi K3

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

shared result series: 195
distinct benchmarks: 26
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 Kimi K3
Attribute	Muse Spark 1.3	Kimi K3
Provider	Meta	Moonshot AI
Released	Sep 2, 2026	Jul 16, 2026
Availability	Active	Active
Model type	Proprietary	Open Weights
Parameters	Not published	2.8T, 104B active
Architecture	Not published	Mixture of Experts
Context window	1,048,576 tokens	1,048,576 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 Kimi K3
Price type	Muse Spark 1.3	Kimi K3
API input	$1.25	$3
API output	$4.25	$15
Cache read	$0.15	$0.3
Cache write (5 min.)	Not listed	Not listed
Cache write (1 hr.)	Not listed	Not listed
Price verified	10/18/2026 Source	09/22/2026 Source

Muse Spark 1.3Kimi K3

API inputUSD per 1M tokens, base tier

Muse Spark 1.3$1.25

Kimi K3$3

API outputUSD per 1M tokens, base tier

Muse Spark 1.3$4.25

Kimi K3$15

Cache readUSD per 1M tokens, base tier

Muse Spark 1.3$0.15

Kimi K3$0.3

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 Kimi K3
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
Kimi K3	Moonshot AI	Direct from developerStandard API	$3	$15	Source09/22/2026
	AkashML	Via OpenRouterakashml/fp4	$1.2	$14	Source10/18/2026
	Alibaba	Via OpenRouteralibaba	$3.45	$17.25	Source10/18/2026
	Amazon Bedrock	Via OpenRouteramazon-bedrock/us-east-2	$3	$15	Source10/18/2026
	BaseTen	Via OpenRouterbaseten/fp8	$3	$15	Source10/18/2026
	Chutes	Via OpenRouterchutes/mxfp4	$1.85	$9.5	Source10/18/2026
	Decart	Via OpenRouterdecart/mxfp4	$1.65	$8.25	Source10/18/2026
	DeepInfra	Via OpenRouterdeepinfra/mxfp4	$2.85	$14.25	Source10/18/2026
	DigitalOcean	Via OpenRouterdigitalocean	$2.55	$12.95	Source10/18/2026
	Fireworks	Via OpenRouterfireworks	$3	$15	Source10/18/2026
	Fireworks	Via OpenRouterfireworks/fast	$4.5	$22.5	Source10/18/2026
	Fireworks	Via OpenRouterfireworks/us	$4.5	$22.5	Source10/18/2026
	InferenceNet	Via OpenRouterinference-net/fast	$2.49	$15	Source10/18/2026
	InferenceNet	Via OpenRouterinference-net/fp4	$0.304	$11.936	Source10/18/2026
	Makora	Via OpenRoutermakora/fp4	$1.53	$12.75	Source10/18/2026
	Modal	Via OpenRoutermodal/mxfp4	$3	$15	Source10/18/2026
	Moonshot AI	Via OpenRoutermoonshotai/mxfp4	$3	$15	Source10/18/2026
	Morph	Via OpenRoutermorph/fp8	$0.314	$14.9	Source10/18/2026
	Phala	Via OpenRouterphala	$2.55	$12.75	Source10/18/2026
	Relace	Via OpenRouterrelace/fp4	$0.5	Lowest listed price: $8	Source10/18/2026
	Sail Research	Via OpenRoutersail-research/fp4	$0.504	$8.1	Source10/18/2026
	Sail Research	Via OpenRoutersail-research/fp4/us	$0.84	$13.5	Source10/18/2026
	Together	Via OpenRoutertogether	$3	$15	Source10/18/2026
	Wafer	Via OpenRouterwafer	Lowest listed price: $0.28	$16	Source10/18/2026
	Wafer	Via OpenRouterwafer/us	$0.36	$11.9	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

Kimi K3

Coding: 100 / 79 (3 benchmark families)

Reasoning: 98.4 / 94.7 (4 benchmark families)

Mathematics: 99.7 / 99.9 (1 benchmark family)

Knowledge: 99.8 / 89.4 (2 benchmark families)

Finance: 100 / 99 (1 benchmark family)

Legal: 99.6 / 100 (1 benchmark family)

Agentic tasks: 99.8 / 95.4 (3 benchmark families)

Health: 98.8 / 100 (1 benchmark family)

43 matched rows from 11 benchmark families were considered. The radar shows 8 of 10 comparable categories.

Muse Spark 1.3Kimi K3

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

Muse Spark 1.31,581.34 elo

Kimi K31,500.97 elo

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

Muse Spark 1.383.0%

Kimi K388.7%

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

Muse Spark 1.325 points

Kimi K319.7 points

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

Muse Spark 1.348.092 points

Kimi K343.594 points

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

Muse Spark 1.357.9%

Kimi K358.3%

Code MigrationOverall. Higher is better. Test setup not documented as identical

Muse Spark 1.327.58 %

Kimi K316.099 %

CyberBench v1.1Overall. Higher is better. Test setup not documented as identical

Muse Spark 1.369.405 %

Kimi K375.238 %

EMBOverall. Higher is better. Test setup not documented as identical

Muse Spark 1.362.712 %

Kimi K366.677 %

Finance Agent (v2)Overall. Higher is better. Test setup not documented as identical

Muse Spark 1.358.901 %

Kimi K353.114 %

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

Muse Spark 1.326.6%

Kimi K322.0%

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

Muse Spark 1.31,680.99 elo

Kimi K31,533.13 elo

Harvey's Legal Agent BenchmarkOverall · Task fully resolved. Higher is better. Test setup not documented as identical

Muse Spark 1.322.917 %

Kimi K312.917 %

Key to the marks:better valuebetter, but not conclusivetie

Benchmark scores for Muse Spark 1.3 and Kimi K3
Benchmark and task	Muse Spark 1.3	Kimi K3	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 Kimi K3: Snapshot: Kimi K3 (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.Kimi K3: Exact AA configuration: Kimi K3 (Max) (release kimi-k3, row kimi-k3, UUID f7d2fc3e-1f7b-405f-818c-07952a4af78f, reasoning=true, source reasoning-token configuration budget=2000, suffix=Max). This configured value is not measured token consumption.	Winner1,581.34 elo	1,500.97 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 Kimi K3: Snapshot: Kimi K3 (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.Kimi K3: Exact AA configuration: Kimi K3 (Max) (release kimi-k3, row kimi-k3, UUID f7d2fc3e-1f7b-405f-818c-07952a4af78f, reasoning=true, source reasoning-token configuration budget=2000, suffix=Max). This configured value is not measured token consumption.	83.0%	Winner88.7%	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 Kimi K3: Snapshot: Kimi K3 (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.Kimi K3: Exact AA configuration: Kimi K3 (Max) (release kimi-k3, row kimi-k3, UUID f7d2fc3e-1f7b-405f-818c-07952a4af78f, 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.	19.7 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 Kimi K3: Snapshot: Kimi K3 (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.Kimi K3: Exact AA configuration: Kimi K3 (Max) (release kimi-k3, row kimi-k3, UUID f7d2fc3e-1f7b-405f-818c-07952a4af78f, reasoning=true, source reasoning-token configuration budget=2000, suffix=Max). This configured value is not measured token consumption.	Winner48.092 points	43.594 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 Kimi K3: Snapshot: Kimi K3 (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.Kimi K3: Exact AA configuration: Kimi K3 (Max) (release kimi-k3, row kimi-k3, UUID f7d2fc3e-1f7b-405f-818c-07952a4af78f, reasoning=true, source reasoning-token configuration budget=2000, suffix=Max). This configured value is not measured token consumption.	57.9%	Winner58.3%	Artificial Analysis Source details Data as of: 10/15/2026
Code MigrationOverall Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterMuse Spark 1.3: Reasoning: xhigh, Temperature: 1, Output limit: 131,072 tokens Kimi K3: Reasoning: max, Temperature: 1, Top P: 0.95, Output limit: 262,144 tokens	Higher measured value27.58 %	16.099 %	Vals AI Source details Data as of: 10/12/2026
CyberBench v1.1Overall Test details Test setup not documented as identicalNo direct winnerVersion: 1.1Metric: accuracyScoring: Higher is betterMuse Spark 1.3: Reasoning: xhigh, Temperature: 1, Output limit: 131,072 tokens Kimi K3: Reasoning: max, Output limit: 262,144 tokens	69.405 %	Higher measured value75.238 %	Vals AI Source details Data as of: 10/12/2026
EMBOverall Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterMuse Spark 1.3: Reasoning: xhigh, Temperature: 1, Output limit: 131,072 tokens Kimi K3: Reasoning: max, Temperature: 1, Top P: 0.95, Output limit: 262,144 tokens	62.712 %	Higher measured value66.677 %	Vals AI Source details Data as of: 10/12/2026
Finance Agent (v2)Overall Test details Test setup not documented as identicalNo direct winnerVersion: 2Metric: accuracyScoring: Higher is betterMuse Spark 1.3: Reasoning: xhigh, Temperature: 1, Output limit: 131,072 tokens Kimi K3: Reasoning: max, Temperature: 1, Top P: 0.95, Output limit: 262,144 tokens	Higher measured value58.901 %	53.114 %	Vals AI Source details Data as of: 10/12/2026
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 Kimi K3: Snapshot: Kimi K3 (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.Kimi K3: Exact AA configuration: Kimi K3 (Max) (release kimi-k3, row kimi-k3, UUID f7d2fc3e-1f7b-405f-818c-07952a4af78f, reasoning=true, source reasoning-token configuration budget=2000, suffix=Max). This configured value is not measured token consumption.	Winner26.6%	22.0%	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 Kimi K3: Snapshot: Kimi K3 (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.Kimi K3: Exact AA configuration: Kimi K3 (Max) (release kimi-k3, row kimi-k3, UUID f7d2fc3e-1f7b-405f-818c-07952a4af78f, reasoning=true, source reasoning-token configuration budget=2000, suffix=Max). This configured value is not measured token consumption.	Winner1,680.99 elo	1,533.13 elo	Artificial Analysis Source details Data as of: 10/15/2026
Harvey's Legal Agent BenchmarkOverall · Task fully resolved Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: task resolution rateScoring: Higher is betterMuse Spark 1.3: Reasoning: xhigh, Temperature: 1, Output limit: 131,072 tokens Kimi K3: Reasoning: max, Temperature: 1, Top P: 0.95, Output limit: 262,144 tokens	Higher measured value22.917 %	12.917 %	Vals AI Source details Data as of: 10/12/2026
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 Kimi K3: Snapshot: Kimi K3 (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.Kimi K3: Exact AA configuration: Kimi K3 (Max) (release kimi-k3, row kimi-k3, UUID f7d2fc3e-1f7b-405f-818c-07952a4af78f, 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.	46.9% 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
IOIOverall Test details Test setup not documented as identicalNo direct winnerVersion: 2Metric: accuracyScoring: Higher is betterMuse Spark 1.3: Reasoning: xhigh, Temperature: 1, Output limit: 131,072 tokens Kimi K3: Reasoning: max, Temperature: 1, Top P: 0.95, Output limit: 262,144 tokens	43.944 %	Higher measured value48.944 %	Vals AI Source details Data as of: 10/14/2026
Legal Research BenchOverall · All-pass Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: all-pass rateScoring: Higher is betterMuse Spark 1.3: Reasoning: xhigh, Temperature: 1, Output limit: 131,072 tokens Kimi K3: Reasoning: max, Temperature: 1, Top P: 0.95, Output limit: 262,144 tokens	40.865 %	Higher measured value46.154 %	Vals AI Source details Data as of: 10/12/2026
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 Kimi K3: Snapshot: kimi-k3-max, Reasoning: max, Harness: Arena Code Arena WebDevMuse Spark 1.3: Arena rating from 7,987 published pairwise votes.Kimi K3: Arena rating from 18,644 published pairwise votes.	1,621.927 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.	Higher measured value1,655.295 95% confidence interval: ±6.069The 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 No documented difference in the test setupNo clear leadVersion: 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 Kimi K3: Snapshot: kimi-k3-max, Reasoning: max, Harness: Arena Text, style controlMuse Spark 1.3: Arena rating from 16,731 published pairwise votes.Kimi K3: Arena rating from 32,036 published pairwise votes.	No clear lead1,494.213 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.	1,488.095 95% confidence interval: ±4.609The 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
ProgramBenchOverall Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: fully resolved rateScoring: Higher is betterMuse Spark 1.3: Reasoning: xhigh, Temperature: 1, Output limit: 131,072 tokens Kimi K3: Temperature: 1, Output limit: 262,144 tokens	0.5 %	Higher measured value2 %	Vals AI Source details Data as of: 10/12/2026
ProofBenchOverall Test details Test setup not documented as identicalNo direct winnerVersion: 1.1Metric: accuracyScoring: Higher is betterMuse Spark 1.3: Reasoning: xhigh, Temperature: 1, Output limit: 131,072 tokens Kimi K3: Reasoning: max, Output limit: 262,144 tokens	55 %	Higher measured value87 %	Vals AI Source details Data as of: 10/12/2026
Tax Agent BenchOverall Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterMuse Spark 1.3: Reasoning: xhigh, Temperature: 1, Output limit: 131,072 tokens Kimi K3: Reasoning: max, Temperature: 1, Top P: 0.95, Output limit: 262,144 tokens	Higher measured value35.974 %	33.368 %	Vals AI Source details Data as of: 10/12/2026
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 Kimi K3: Snapshot: Kimi K3 (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.Kimi K3: Exact AA configuration: Kimi K3 (Max) (release kimi-k3, row kimi-k3, UUID f7d2fc3e-1f7b-405f-818c-07952a4af78f, reasoning=true, source reasoning-token configuration budget=2000, suffix=Max). This configured value is not measured token consumption.	Winner33.3%	12.6%	Artificial Analysis Source details Data as of: 10/15/2026
Terminal-Bench 2.1Overall Test details Test setup not documented as identicalNo direct winnerVersion: 2.1Metric: accuracyScoring: Higher is betterMuse Spark 1.3: Reasoning: xhigh, Temperature: 1, Output limit: 131,072 tokens Kimi K3: Temperature: 1, Output limit: 262,144 tokens	72.285 %	Higher measured value80.899 %	Vals AI Source details Data as of: 09/28/2026
Terminal-Bench 4.0Overall Test details Test setup not documented as identicalNo direct winnerVersion: 4.0Metric: accuracyScoring: Higher is betterMuse Spark 1.3: Reasoning: xhigh, Temperature: 1, Output limit: 131,072 tokens Kimi K3: Reasoning: max, Temperature: 1, Top P: 0.95, Output limit: 262,144 tokens	10.606 %	Higher measured value17.172 %	Vals AI Source details Data as of: 10/13/2026
Terminal-Bench ScienceOverall Test details Test setup not documented as identicalNo direct winnerVersion: 0.1Metric: accuracyScoring: Higher is betterMuse Spark 1.3: Reasoning: xhigh, Harness: Mini-SWE-agent, Temperature: 1, Output limit: 131,072 tokens Kimi K3: Reasoning: max, Harness: Mini-SWE-agent, Temperature: 1, Top P: 0.95, Output limit: 262,144 tokens	Higher measured value4.286 %	1.429 %	Vals AI Source details Data as of: 10/14/2026
Vals IndexOverall Test details Test setup not documented as identicalNo direct winnerVersion: 2.1Metric: weighted index scoreScoring: Higher is betterMuse Spark 1.3: Reasoning: xhigh, Temperature: 1, Output limit: 131,072 tokens Kimi K3: Reasoning: max, Temperature: 1, Top P: 0.95, Output limit: 262,144 tokens	Higher measured value53.197 %	50.297 %	Vals AI Source details Data as of: 10/13/2026
Vibe Code Bench v1.1Overall Test details Test setup not documented as identicalNo direct winnerVersion: 1.1Metric: accuracyScoring: Higher is betterMuse Spark 1.3: Reasoning: xhigh, Harness: OpenHands, Temperature: 1, Output limit: 131,072 tokens Kimi K3: Reasoning: max, Harness: OpenHands, Temperature: 1, Top P: 0.95, Output limit: 262,144 tokens	82.859 %	Higher measured value84.968 %	Vals AI Source details Data as of: 10/12/2026
Code MigrationCLI Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterMuse Spark 1.3: Reasoning: xhigh, Temperature: 1, Output limit: 131,072 tokens Kimi K3: Reasoning: max, Temperature: 1, Top P: 0.95, Output limit: 262,144 tokens	Higher measured value13.916 %	1.465 %	Vals AI Source details Data as of: 10/12/2026
CyberBench v1.1Patch Test details Test setup not documented as identicalNo direct winnerVersion: 1.1Metric: accuracyScoring: Higher is betterMuse Spark 1.3: Reasoning: xhigh, Temperature: 1, Output limit: 131,072 tokens Kimi K3: Reasoning: max, Output limit: 262,144 tokens	No direct winner82.143 %	No direct winner82.143 %	Vals AI Source details Data as of: 10/12/2026
EMBComps Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterMuse Spark 1.3: Reasoning: xhigh, Temperature: 1, Output limit: 131,072 tokens Kimi K3: Reasoning: max, Temperature: 1, Top P: 0.95, Output limit: 262,144 tokens	64.798 %	Higher measured value70.837 %	Vals AI Source details Data as of: 10/12/2026
Finance Agent (v2)Adjustments Test details Test setup not documented as identicalNo direct winnerVersion: 2Metric: accuracyScoring: Higher is betterMuse Spark 1.3: Reasoning: xhigh, Temperature: 1, Output limit: 131,072 tokens Kimi K3: Reasoning: max, Temperature: 1, Top P: 0.95, Output limit: 262,144 tokens	Higher measured value52.818 %	45.274 %	Vals AI Source details Data as of: 10/12/2026
Harvey's Legal Agent BenchmarkAntitrust Competition · Criteria passed Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: criteria pass rateScoring: Higher is betterMuse Spark 1.3: Reasoning: xhigh, Temperature: 1, Output limit: 131,072 tokens Kimi K3: Reasoning: max, Temperature: 1, Top P: 0.95, Output limit: 262,144 tokens	Higher measured value96.377 %	88.768 %	Vals AI Source details Data as of: 10/12/2026
IOIIOI 2024 Test details Test setup not documented as identicalNo direct winnerVersion: 2Metric: accuracyScoring: Higher is betterMuse Spark 1.3: Reasoning: xhigh, Temperature: 1, Output limit: 131,072 tokens Kimi K3: Reasoning: max, Temperature: 1, Top P: 0.95, Output limit: 262,144 tokens	42.667 %	Higher measured value59.667 %	Vals AI Source details Data as of: 10/14/2026
Legal Research BenchAdministrative / Regulatory · All-pass Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: all-pass rateScoring: Higher is betterMuse Spark 1.3: Reasoning: xhigh, Temperature: 1, Output limit: 131,072 tokens Kimi K3: Reasoning: max, Temperature: 1, Top P: 0.95, Output limit: 262,144 tokens	51.515 %	Higher measured value63.636 %	Vals AI Source details Data as of: 10/12/2026
LMArena Code Arena WebDevOverall Test details No documented difference in the test setupNo clear leadVersion: 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 Kimi K3: Snapshot: kimi-k3-max, Reasoning: max, Harness: Arena Code Arena WebDevMuse Spark 1.3: Arena rating from 8,683 published pairwise votes.Kimi K3: Arena rating from 18,644 published pairwise votes.	No clear lead1,658.54 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.	1,655.295 95% confidence interval: ±6.069The 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 No documented difference in the test setupNo clear leadVersion: 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 Kimi K3: Snapshot: kimi-k3-max, Reasoning: max, Harness: Arena Text, style controlMuse Spark 1.3: Arena rating from 3,041 published pairwise votes.Kimi K3: Arena rating from 6,035 published pairwise votes.	No clear lead1,503.61 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.	1,487.914 95% confidence interval: ±8.167The 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
ProgramBenchAlmost Resolved Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: almost-resolved rateScoring: Higher is betterMuse Spark 1.3: Reasoning: xhigh, Temperature: 1, Output limit: 131,072 tokens Kimi K3: Temperature: 1, Output limit: 262,144 tokens	13 %	Higher measured value17.5 %	Vals AI Source details Data as of: 10/12/2026
Tax Agent BenchControversy & Precedence Analysis Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterMuse Spark 1.3: Reasoning: xhigh, Temperature: 1, Output limit: 131,072 tokens Kimi K3: Reasoning: max, Temperature: 1, Top P: 0.95, Output limit: 262,144 tokens	Higher measured value14.667 %	13.333 %	Vals AI Source details Data as of: 10/12/2026
Terminal-Bench 2.1Easy Test details Test setup not documented as identicalNo direct winnerVersion: 2.1Metric: accuracyScoring: Higher is betterMuse Spark 1.3: Reasoning: xhigh, Temperature: 1, Output limit: 131,072 tokens Kimi K3: Temperature: 1, Output limit: 262,144 tokens	75 %	Higher measured value91.667 %	Vals AI Source details Data as of: 09/28/2026
Terminal-Bench 4.0Hardware Test details Test setup not documented as identicalNo direct winnerVersion: 4.0Metric: accuracyScoring: Higher is betterMuse Spark 1.3: Reasoning: xhigh, Temperature: 1, Output limit: 131,072 tokens Kimi K3: Reasoning: max, Temperature: 1, Top P: 0.95, Output limit: 262,144 tokens	0 %	Higher measured value13.333 %	Vals AI Source details Data as of: 10/13/2026
Terminal-Bench ScienceEarth Sciences Test details Test setup not documented as identicalNo direct winnerVersion: 0.1Metric: accuracyScoring: Higher is betterMuse Spark 1.3: Reasoning: xhigh, Harness: Mini-SWE-agent, Temperature: 1, Output limit: 131,072 tokens Kimi K3: Reasoning: max, Harness: Mini-SWE-agent, Temperature: 1, Top P: 0.95, Output limit: 262,144 tokens	0 %	Higher measured value12.5 %	Vals AI Source details Data as of: 10/14/2026
Vals IndexCode Migration Test details Test setup not documented as identicalNo direct winnerVersion: 2.1Metric: benchmark scoreScoring: Higher is betterMuse Spark 1.3: Reasoning: xhigh, Temperature: 1, Output limit: 131,072 tokens Kimi K3: Reasoning: max, Temperature: 1, Top P: 0.95, Output limit: 262,144 tokens	Higher measured value42.192 %	16.042 %	Vals AI Source details Data as of: 10/13/2026
Code MigrationCOBOL Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterMuse Spark 1.3: Reasoning: xhigh, Temperature: 1, Output limit: 131,072 tokens Kimi K3: Reasoning: max, Temperature: 1, Top P: 0.95, Output limit: 262,144 tokens	Higher measured value68.571 %	60 %	Vals AI Source details Data as of: 10/12/2026
CyberBench v1.1PoC Test details Test setup not documented as identicalNo direct winnerVersion: 1.1Metric: accuracyScoring: Higher is betterMuse Spark 1.3: Reasoning: xhigh, Temperature: 1, Output limit: 131,072 tokens Kimi K3: Reasoning: max, Output limit: 262,144 tokens	56.667 %	Higher measured value68.333 %	Vals AI Source details Data as of: 10/12/2026
EMBDataroom Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterMuse Spark 1.3: Reasoning: xhigh, Temperature: 1, Output limit: 131,072 tokens Kimi K3: Reasoning: max, Temperature: 1, Top P: 0.95, Output limit: 262,144 tokens	Higher measured value84.191 %	82.661 %	Vals AI Source details Data as of: 10/12/2026
Finance Agent (v2)All-Pass Test details Test setup not documented as identicalNo direct winnerVersion: 2Metric: accuracyScoring: Higher is betterMuse Spark 1.3: Reasoning: xhigh, Temperature: 1, Output limit: 131,072 tokens Kimi K3: Reasoning: max, Temperature: 1, Top P: 0.95, Output limit: 262,144 tokens	Higher measured value48.737 %	41.837 %	Vals AI Source details Data as of: 10/12/2026
Harvey's Legal Agent BenchmarkAntitrust Competition · Task fully resolved Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: task resolution rateScoring: Higher is betterMuse Spark 1.3: Reasoning: xhigh, Temperature: 1, Output limit: 131,072 tokens Kimi K3: Reasoning: max, Temperature: 1, Top P: 0.95, Output limit: 262,144 tokens	No direct winner20 %	No direct winner20 %	Vals AI Source details Data as of: 10/12/2026
IOIIOI 2025 Test details Test setup not documented as identicalNo direct winnerVersion: 2Metric: accuracyScoring: Higher is betterMuse Spark 1.3: Reasoning: xhigh, Temperature: 1, Output limit: 131,072 tokens Kimi K3: Reasoning: max, Temperature: 1, Top P: 0.95, Output limit: 262,144 tokens	Higher measured value46.833 %	29.333 %	Vals AI Source details Data as of: 10/14/2026
Legal Research BenchAdministrative / Regulatory · Weighted partial credit Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: weighted partial-credit scoreScoring: Higher is betterMuse Spark 1.3: Reasoning: xhigh, Temperature: 1, Output limit: 131,072 tokens Kimi K3: Reasoning: max, Temperature: 1, Top P: 0.95, Output limit: 262,144 tokens	85.884 %	Higher measured value89.252 %	Vals AI Source details Data as of: 10/12/2026
LMArena Code Arena WebDevImage to webdev 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 Kimi K3: Snapshot: kimi-k3-max, Reasoning: max, Harness: Arena Code Arena WebDevMuse Spark 1.3: Arena rating from 2,152 published pairwise votes.Kimi K3: Arena rating from 3,504 published pairwise votes.	Higher measured value1,597.944 95% confidence interval: ±13.55The Arena score measures human preference rather than a fixed capability test. The confidence interval, Arena category, and model configuration are part of the result.	1,579.165 95% confidence interval: ±10.818The 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: 10/09/2026
LMArena Text, Style ControlChinese Test details No documented difference in the test setupNo clear leadVersion: 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 Kimi K3: Snapshot: kimi-k3-max, Reasoning: max, Harness: Arena Text, style controlMuse Spark 1.3: Arena rating from 1,298 published pairwise votes.Kimi K3: Arena rating from 2,319 published pairwise votes.	1,529.417 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.	No clear lead1,542.023 95% confidence interval: ±12.722The 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
ProgramBenchFully Resolved Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: fully resolved rateScoring: Higher is betterMuse Spark 1.3: Reasoning: xhigh, Temperature: 1, Output limit: 131,072 tokens Kimi K3: Temperature: 1, Output limit: 262,144 tokens	0.5 %	Higher measured value2 %	Vals AI Source details Data as of: 10/12/2026
Tax Agent BenchControversy & Precedence Analysis Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterMuse Spark 1.3: Reasoning: xhigh, Temperature: 1, Output limit: 131,072 tokens Kimi K3: Reasoning: max, Temperature: 1, Top P: 0.95, Output limit: 262,144 tokens	60.859 %	Higher measured value68.8 %	Vals AI Source details Data as of: 10/12/2026
Terminal-Bench 2.1Hard Test details Test setup not documented as identicalNo direct winnerVersion: 2.1Metric: accuracyScoring: Higher is betterMuse Spark 1.3: Reasoning: xhigh, Temperature: 1, Output limit: 131,072 tokens Kimi K3: Temperature: 1, Output limit: 262,144 tokens	61.111 %	Higher measured value74.444 %	Vals AI Source details Data as of: 09/28/2026
Terminal-Bench 4.0Media Test details Test setup not documented as identicalNo direct winnerVersion: 4.0Metric: accuracyScoring: Higher is betterMuse Spark 1.3: Reasoning: xhigh, Temperature: 1, Output limit: 131,072 tokens Kimi K3: Reasoning: max, Temperature: 1, Top P: 0.95, Output limit: 262,144 tokens	0 %	Higher measured value16.667 %	Vals AI Source details Data as of: 10/13/2026
Terminal-Bench ScienceEngineering Sciences Test details Test setup not documented as identicalNo direct winnerVersion: 0.1Metric: accuracyScoring: Higher is betterMuse Spark 1.3: Reasoning: xhigh, Harness: Mini-SWE-agent, Temperature: 1, Output limit: 131,072 tokens Kimi K3: Reasoning: max, Harness: Mini-SWE-agent, Temperature: 1, Top P: 0.95, Output limit: 262,144 tokens	No direct winner0 %	No direct winner0 %	Vals AI Source details Data as of: 10/14/2026
Vals IndexEMB Test details Test setup not documented as identicalNo direct winnerVersion: 2.1Metric: benchmark scoreScoring: Higher is betterMuse Spark 1.3: Reasoning: xhigh, Temperature: 1, Output limit: 131,072 tokens Kimi K3: Reasoning: max, Temperature: 1, Top P: 0.95, Output limit: 262,144 tokens	62.712 %	Higher measured value66.677 %	Vals AI Source details Data as of: 10/13/2026
Code MigrationCode Quality Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: mean reviewer code-quality ratingScoring: Higher is betterMuse Spark 1.3: Reasoning: xhigh, Temperature: 1, Output limit: 131,072 tokens Kimi K3: Reasoning: max, Temperature: 1, Top P: 0.95, Output limit: 262,144 tokens	Higher measured value4.02 / 5	3.899 / 5	Vals AI Source details Data as of: 10/12/2026
EMBDCF Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterMuse Spark 1.3: Reasoning: xhigh, Temperature: 1, Output limit: 131,072 tokens Kimi K3: Reasoning: max, Temperature: 1, Top P: 0.95, Output limit: 262,144 tokens	55.697 %	Higher measured value56.736 %	Vals AI Source details Data as of: 10/12/2026
Finance Agent (v2)Comparables Test details Test setup not documented as identicalNo direct winnerVersion: 2Metric: accuracyScoring: Higher is betterMuse Spark 1.3: Reasoning: xhigh, Temperature: 1, Output limit: 131,072 tokens Kimi K3: Reasoning: max, Temperature: 1, Top P: 0.95, Output limit: 262,144 tokens	47.167 %	Higher measured value47.778 %	Vals AI Source details Data as of: 10/12/2026
Harvey's Legal Agent BenchmarkArbitration International Dispute Resolution · Criteria passed Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: criteria pass rateScoring: Higher is betterMuse Spark 1.3: Reasoning: xhigh, Temperature: 1, Output limit: 131,072 tokens Kimi K3: Reasoning: max, Temperature: 1, Top P: 0.95, Output limit: 262,144 tokens	Higher measured value93.907 %	91.398 %	Vals AI Source details Data as of: 10/12/2026
IOIIOI 2026 Test details Test setup not documented as identicalNo direct winnerVersion: 2Metric: accuracyScoring: Higher is betterMuse Spark 1.3: Reasoning: xhigh, Temperature: 1, Output limit: 131,072 tokens Kimi K3: Reasoning: max, Temperature: 1, Top P: 0.95, Output limit: 262,144 tokens	42.333 %	Higher measured value57.833 %	Vals AI Source details Data as of: 10/14/2026
Legal Research BenchBusiness & Commercial · All-pass Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: all-pass rateScoring: Higher is betterMuse Spark 1.3: Reasoning: xhigh, Temperature: 1, Output limit: 131,072 tokens Kimi K3: Reasoning: max, Temperature: 1, Top P: 0.95, Output limit: 262,144 tokens	32.558 %	Higher measured value39.535 %	Vals AI Source details Data as of: 10/12/2026
LMArena Code Arena WebDevImage to webdev Test details No documented difference in the test setupVersion: 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 Kimi K3: Snapshot: kimi-k3-max, Reasoning: max, Harness: Arena Code Arena WebDevMuse Spark 1.3: Arena rating from 4,688 published pairwise votes.Kimi K3: Arena rating from 3,504 published pairwise votes.	Winner1,641.977 95% confidence interval: ±9.755The Arena score measures human preference rather than a fixed capability test. The confidence interval, Arena category, and model configuration are part of the result.	1,579.165 95% confidence interval: ±10.818The 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: 10/09/2026
LMArena Text, Style ControlCoding Test details No documented difference in the test setupNo clear leadVersion: 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 Kimi K3: Snapshot: kimi-k3-max, Reasoning: max, Harness: Arena Text, style controlMuse Spark 1.3: Arena rating from 4,357 published pairwise votes.Kimi K3: Arena rating from 8,136 published pairwise votes.	1,536.661 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.	No clear lead1,538.885 95% confidence interval: ±7.308The 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
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

Kimi K3

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

Kimi K3

Reasoning (requested): high

Current attempt

Run date: Oct 1, 2026
API provider: openrouter
Requested API model: moonshotai/kimi-k3
API model reported in response: moonshotai/kimi-k3
Reasoning setting: high
Pinned endpoint: Moonshot AI | moonshotai/kimi-k3-20260715
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: 173.4 s

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

Earlier attempts (1)

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 Kimi K3 with other leading models using the same data and benchmark logic.

View the complete LLM comparison

Muse Spark 1.3 vs. Kimi K3

Change model selection

General specifications

API pricing compared

Shared benchmarks

Capability profile from matched benchmarks

Our tests

SVG short test

Muse Spark 1.3

Kimi K3

Pelican on a bicycle

Winning one benchmark is not an overall verdict

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