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Head-to-head comparison

Grok 4.5 vs. DeepSeek-V4.1-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
19
distinct benchmarks
19
latest retrieval
2026-09-29

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Specifications

General specifications

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

Specifications for Grok 4.5 and DeepSeek-V4.1-Flash
AttributeGrok 4.5DeepSeek-V4.1-Flash
ProviderxAIDeepSeek
ReleasedJul 16, 2026Sep 10, 2026
AvailabilityActiveActive
Model typeProprietaryOpen Weights
ParametersNot published552B
ArchitectureNot publishedMixture of Experts
Context window500,000 tokens1,000,000 tokens
Knowledge cutoffFebruary 1, 2026Not published
Technical sourcesModelModel

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 Grok 4.5 and DeepSeek-V4.1-Flash
Price typeGrok 4.5DeepSeek-V4.1-Flash
API input$2 ≤200K / $4 >200K$0.15 (Off-Peak)
API output$6 ≤200K / $12 >200K$0.6 (Off-Peak)
Cache read$0.3 ≤200K / $0.6 >200K$0. (Off-Peak)
Cache write (5 min.)Not listedNot listed
Cache write (1 hr.)Not listedNot listed
Price verified09/22/2026 Source09/23/2026 Source
DeepSeek-V4.1-Flash: peak pricing is $0.3 input / $1.2 output per 1M tokens during Mon, Tue, Wed, Thu, Fri, 01:00-04:00 UTC; Mon, Tue, Wed, Thu, Fri, 06:00-10:00 UTC; off-peak rates apply at all other times.
Grok 4.5DeepSeek-V4.1-Flash
API inputUSD per 1M tokens, base tier
Grok 4.5$2
DeepSeek-V4.1-FlashLower price$0.15
API outputUSD per 1M tokens, base tier
Grok 4.5$6
DeepSeek-V4.1-FlashLower price$0.6
Cache readUSD per 1M tokens, base tier
Grok 4.5$0.3
DeepSeek-V4.1-FlashLower price$0.003

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 Grok 4.5 and DeepSeek-V4.1-Flash
ModelProviderPurchase route and tariffInput per 1M tokensOutput per 1M tokensSource
Grok 4.5xAIDirect from developerUp to 200,000 context tokensLowest listed price: $2Lowest listed price: $6Source09/22/2026
xAIDirect from developerAbove 200,000 context tokens$4$12Source09/22/2026
xAIVia OpenRouterxaiLowest listed price: $2Lowest listed price: $6Source10/07/2026
xAIVia OpenRouterxai/priority$4$12Source10/07/2026
xAIVia OpenRouterxai/zdrLowest listed price: $2Lowest listed price: $6Source10/07/2026
xAIVia OpenRouterxai/zdr/priority$4$12Source10/07/2026
DeepSeek-V4.1-FlashDeepSeekDirect from developerStandard API$0.15$0.6Source09/23/2026
AlibabaVia OpenRouteralibaba$0.3$1.2Source10/07/2026
AtlasCloudVia OpenRouteratlas-cloud/fp8$0.141$0.564Source10/07/2026
BaiduVia OpenRouterbaidu/fp8$0.3$1.2Source10/07/2026
BaseTenVia OpenRouterbaseten/fp8#1$0.3$1.2Source10/07/2026
BaseTenVia OpenRouterbaseten/fp8#2$0.3$1.2Source10/07/2026
CoreWeaveVia OpenRoutercoreweave/fp8$0.2$0.65Source10/07/2026
DecartVia OpenRouterdecart/fp4$0.09Lowest listed price: $0.18Source10/07/2026
DeepInfraVia OpenRouterdeepinfra/fp8$0.14$0.42Source10/07/2026
DeepSeekVia OpenRouterdeepseek$0.3$1.2Source10/07/2026
DekaLLMVia OpenRouterdekallm$0.12$2.4Source10/07/2026
DigitalOceanVia OpenRouterdigitalocean$0.18$0.72Source10/07/2026
FireworksVia OpenRouterfireworks/us$0.45$1.8Source10/07/2026
GMICloudVia OpenRoutergmicloud/fp8$0.18$0.72Source10/07/2026
InferenceNetVia OpenRouterinference-net/fp8$0.039$0.3Source10/07/2026
IonstreamVia OpenRouterionstream$0.1386$1.15Source10/07/2026
MakoraVia OpenRoutermakora/fp8$0.27$1.15Source10/07/2026
ModalVia OpenRoutermodal$0.3$1.2Source10/07/2026
MorphVia OpenRoutermorph/fp8$0.15$0.471Source10/07/2026
NovitaVia OpenRouternovita/fp8$0.195$0.78Source10/07/2026
ParasailVia OpenRouterparasail/fp8$0.3$1.2Source10/07/2026
PhalaVia OpenRouterphala$0.21$0.84Source10/07/2026
RekaVia OpenRouterreka$0.105$0.84Source10/07/2026
RelaceVia OpenRouterrelace$0.044$0.3Source10/07/2026
Sail ResearchVia OpenRoutersail-research/fp4$0.08$0.4Source10/07/2026
SiliconFlowVia OpenRoutersiliconflow/fp8$0.3$1.2Source10/07/2026
StreamLakeVia OpenRouterstreamlake/fp8$0.141$0.564Source10/07/2026
TogetherVia OpenRoutertogether$0.3$1.2Source10/07/2026
VeniceVia OpenRoutervenice/fp8$0.3$1.2Source10/07/2026
WaferVia OpenRouterwaferLowest listed price: $0.038$1.2Source10/07/2026

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.

255075100CodingMathematicsFinanceLegalAgentic tasksCybersecurityHealthEducation
Grok 4.5
DeepSeek-V4.1-Flash
Coding: 79.5 / 99.8 (4 benchmark families)
Mathematics: 57.4 / 100 (1 benchmark family)
Finance: 94.3 / 99 (3 benchmark families)
Legal: 97.3 / 82.8 (3 benchmark families)
Agentic tasks: 92.8 / 100 (2 benchmark families)
Cybersecurity: 96.4 / 100 (1 benchmark family)
Health: 100 / 96.8 (2 benchmark families)
Education: 73 / 100 (1 benchmark family)

19 matched rows from 18 benchmark families were considered. The radar shows 8 of 10 comparable categories.

Grok 4.5DeepSeek-V4.1-Flash
Code MigrationOverall. Higher is better. No documented setup difference
Grok 4.536.596 %
DeepSeek-V4.1-FlashWinner45.623 %
CyberBench v1.1Overall. Higher is better. No documented setup difference
Grok 4.571.012 %
DeepSeek-V4.1-FlashWinner73.69 %
EMBOverall. Higher is better. No documented setup difference
Grok 4.552.911 %
DeepSeek-V4.1-FlashWinner57.208 %
Finance Agent (v2)Overall. Higher is better. No documented setup difference
Grok 4.548.349 %
DeepSeek-V4.1-FlashWinner53.481 %
Harvey's Legal Agent BenchmarkOverall · Task fully resolved. Higher is better. No documented setup difference
Grok 4.5Winner12.917 %
DeepSeek-V4.1-Flash6.667 %
IOIOverall. Higher is better. No documented setup difference
Grok 4.5Winner40.556 %
DeepSeek-V4.1-Flash40.278 %
Legal Research BenchOverall · All-pass. Higher is better. No documented setup difference
Grok 4.537.981 %
DeepSeek-V4.1-FlashWinner41.346 %
LegalBenchOverall. Higher is better. No documented setup difference
Grok 4.5Winner85.965 %
DeepSeek-V4.1-Flash83.277 %
MedCodeOverall. Higher is better. No documented setup difference
Grok 4.5Winner43.291 %
DeepSeek-V4.1-Flash41.173 %
MedScribeOverall. Higher is better. No documented setup difference
Grok 4.5Winner86.884 %
DeepSeek-V4.1-Flash85.5 %
ProofBenchOverall. Higher is better. No documented setup difference
Grok 4.531 %
DeepSeek-V4.1-FlashWinner54 %
SAGEOverall. Higher is better. No documented setup difference
Grok 4.534.967 %
DeepSeek-V4.1-FlashWinner47.88 %

Key to the marks:better valuebetter, but not conclusivetie

Benchmark scores for Grok 4.5 and DeepSeek-V4.1-Flash
Benchmark and taskGrok 4.5DeepSeek-V4.1-FlashSource
Code MigrationOverall
Test details
No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is better
36.596 %
Winner45.623 %
Vals AI
Source details
Data as of: 09/27/2026
CyberBench v1.1Overall
Test details
No documented difference in the test setupVersion: 1.1Metric: accuracyScoring: Higher is better
71.012 %
Winner73.69 %
Vals AI
Source details
Data as of: 09/27/2026
EMBOverall
Test details
No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is better
52.911 %
Winner57.208 %
Vals AI
Source details
Data as of: 09/27/2026
Finance Agent (v2)Overall
Test details
No documented difference in the test setupVersion: 2Metric: accuracyScoring: Higher is better
48.349 %
Winner53.481 %
Vals AI
Source details
Data as of: 09/27/2026
Harvey's Legal Agent BenchmarkOverall · Task fully resolved
Test details
No documented difference in the test setupVersion: 1Metric: task resolution rateScoring: Higher is better
Winner12.917 %
6.667 %
Vals AI
Source details
Data as of: 09/27/2026
IOIOverall
Test details
No documented difference in the test setupVersion: 2Metric: accuracyScoring: Higher is better
Winner40.556 %
40.278 %
Vals AI
Source details
Data as of: 09/27/2026
Legal Research BenchOverall · All-pass
Test details
No documented difference in the test setupVersion: 1Metric: all-pass rateScoring: Higher is better
37.981 %
Winner41.346 %
Vals AI
Source details
Data as of: 09/27/2026
LegalBenchOverall
Test details
No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is better
Winner85.965 %
83.277 %
Vals AI
Source details
Data as of: 09/27/2026
MedCodeOverall
Test details
No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is better
Winner43.291 %
41.173 %
Vals AI
Source details
Data as of: 09/26/2026
MedScribeOverall
Test details
No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is better
Winner86.884 %
85.5 %
Vals AI
Source details
Data as of: 09/26/2026
ProofBenchOverall
Test details
No documented difference in the test setupVersion: 1.1Metric: accuracyScoring: Higher is better
31 %
Winner54 %
Vals AI
Source details
Data as of: 09/28/2026
SAGEOverall
Test details
No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is better
34.967 %
Winner47.88 %
Vals AI
Source details
Data as of: 09/26/2026
SkillsBenchOverall
Test details
No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is betterSettings: Harness: OpenHands
66.034 %
Winner69.802 %
Vals AI
Source details
Data as of: 09/27/2026
SRE BenchOverall
Test details
No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is better
Tie0.763 %
Tie0.763 %
Vals AI
Source details
Data as of: 09/27/2026
Tax Agent BenchOverall
Test details
No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is better
Winner64.323 %
62.458 %
Vals AI
Source details
Data as of: 09/27/2026
Terminal-Bench 2.1Overall
Test details
No documented difference in the test setupVersion: 2.1Metric: accuracyScoring: Higher is better
67.79 %
Winner74.532 %
Vals AI
Source details
Data as of: 09/27/2026
Terminal-Bench 4.0Overall
Test details
No documented difference in the test setupVersion: 4.0Metric: accuracyScoring: Higher is better
6.566 %
Winner11.616 %
Vals AI
Source details
Data as of: 09/27/2026
Vals IndexOverall
Test details
No documented difference in the test setupVersion: 2Metric: weighted index scoreScoring: Higher is better
51.528 %
Winner57.86 %
Vals AI
Source details
Data as of: 09/27/2026
Vibe Code Bench v1.1Overall
Test details
No documented difference in the test setupVersion: 1.1Metric: accuracyScoring: Higher is betterSettings: Harness: OpenHands
69.002 %
Winner84.739 %
Vals AI
Source details
Data as of: 09/27/2026

Key to the marks:better valuebetter, but not conclusivetie

Our model tests

Our tests

Compare how the models respond to the same prompt. Each test shows the latest attempt, with no subsequent fixes to the generated code. Earlier runs remain available in the test details. These results do not contribute to an overall score.

Pelican on a bicycle

A community classic for free-form SVG drawing.

Grok 4.5

Grok 4.5: Pelican on a bicycle
A community classic for free-form SVG drawing.

Reasoning (requested): high

Current attempt
Run date
1 Oct 2026
API provider
openrouter
Requested API model
x-ai/grok-4.5
API model reported in response
x-ai/grok-4.5
Reasoning setting
high
Pinned endpoint
xAI | x-ai/grok-4.5-20260708
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
23.1 s

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

Earlier attempts (1)
  • 7 Sept 2026API request failedReasoning setting: high

DeepSeek-V4.1-Flash

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

Reasoning (requested): high

Current attempt
Run date
2 Oct 2026
API provider
openrouter
Requested API model
deepseek/deepseek-v4.1-flash
API model reported in response
deepseek/deepseek-v4.1-flash
Reasoning setting
high
Pinned endpoint
DeepSeek | deepseek/deepseek-v4.1-flash-20260910
Temperature
Provider default
Token limit including reasoning
8,192 tokens
Test protocol
community-visual-tests-v1
Technical checks
Failed
Response time
30.5 s

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

Earlier attempts (1)
  • 1 Oct 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

Related LLM comparisons

Compare Grok 4.5 and DeepSeek-V4.1-Flash with other leading models using the same data and benchmark logic.

View the complete LLM comparison