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Head-to-head comparison

GPT-5.4 vs. DeepSeek-V4-Pro

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

shared result series
170
distinct benchmarks
18
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 GPT-5.4 and DeepSeek-V4-Pro
AttributeGPT-5.4DeepSeek-V4-Pro
ProviderOpenAIDeepSeek
ReleasedMar 5, 2026Apr 24, 2026
AvailabilityActiveActive
Model typeProprietaryOpen Weights
ParametersNot published1.6T, 49B active
ArchitectureNot publishedMixture of Experts
Context window1,050,000 tokens1,000,000 tokens
Knowledge cutoffAugust 31, 2025Not published
Technical sourcesModelModel, Context

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 GPT-5.4 and DeepSeek-V4-Pro
Price typeGPT-5.4DeepSeek-V4-Pro
API input$2.5 ≤272K / $5 >272K$0.66 (Off-Peak)
API output$15 ≤272K / $22.5 >272K$1.98 (Off-Peak)
Cache read$0.25 ≤272K / $0.5 >272K$0.02 (Off-Peak)
Cache write (5 min.)Not listedNot listed
Cache write (1 hr.)Not listedNot listed
Price verified09/22/2026 Source09/22/2026 Source
DeepSeek-V4-Pro: peak pricing is $1.32 input / $3.96 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.
GPT-5.4DeepSeek-V4-Pro
API inputUSD per 1M tokens, base tier
GPT-5.4$2.5
DeepSeek-V4-ProLower price$0.66
API outputUSD per 1M tokens, base tier
GPT-5.4$15
DeepSeek-V4-ProLower price$1.98
Cache readUSD per 1M tokens, base tier
GPT-5.4$0.25
DeepSeek-V4-ProLower price$0.022

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 GPT-5.4 and DeepSeek-V4-Pro
ModelProviderPurchase route and tariffInput per 1M tokensOutput per 1M tokensSource
GPT-5.4OpenAIDirect from developerUp to 272,000 context tokensLowest listed price: $2.5Lowest listed price: $15Source09/22/2026
OpenAIDirect from developerAbove 272,000 context tokens$5$22.5Source09/22/2026
Amazon BedrockVia OpenRouteramazon-bedrock/us-east-1$2.75$16.5Source10/02/2026
AzureVia OpenRouterazureLowest listed price: $2.5Lowest listed price: $15Source10/02/2026
AzureVia OpenRouterazure/eu$2.75$16.5Source10/02/2026
AzureVia OpenRouterazure/us$2.75$16.5Source10/02/2026
OpenAIVia OpenRouteropenaiLowest listed price: $2.5Lowest listed price: $15Source10/02/2026
OpenAIVia OpenRouteropenai/fast$5$30Source10/02/2026
DeepSeek-V4-ProDeepSeekDirect from developerStandard API$0.66$1.98Source09/22/2026
AlibabaVia OpenRouteralibaba$0.5808$1.7424Source10/02/2026
AtlasCloudVia OpenRouteratlas-cloud/fp8$1.32$3.96Source10/02/2026
BaiduVia OpenRouterbaidu/fp8Lowest listed price: $0.132Lowest listed price: $0.396Source10/02/2026
CloudflareVia OpenRoutercloudflare$1.32$3.96Source10/02/2026
CoreWeaveVia OpenRoutercoreweave/fp8$1.31$3.96Source10/02/2026
DeepInfraVia OpenRouterdeepinfra/fp8$1.3$2.6Source10/02/2026
DeepSeekVia OpenRouterdeepseek$0.66$1.98Source10/02/2026
DigitalOceanVia OpenRouterdigitalocean$1.32$3.96Source10/02/2026
GMICloudVia OpenRoutergmicloud/fp8$1.056$3.168Source10/02/2026
IonstreamVia OpenRouterionstream$0.2127$1.7424Source10/02/2026
NextBitVia OpenRouternextbit/fp8$1.056$3.168Source10/02/2026
NovitaVia OpenRouternovita/fp8$0.99$2.97Source10/02/2026
ParasailVia OpenRouterparasail/fp8$1.32$3.96Source10/02/2026
PhalaVia OpenRouterphala$0.957$2.8776Source10/02/2026
RelaceVia OpenRouterrelace/fp4$0.9$2.7Source10/02/2026
SiliconFlowVia OpenRoutersiliconflow/fp8$1.32$3.96Source10/02/2026
StreamLakeVia OpenRouterstreamlake$0.66$1.98Source10/02/2026
TogetherVia OpenRoutertogether$1.32$3.96Source10/02/2026
VeniceVia OpenRoutervenice$1.65$4.95Source10/02/2026
WaferVia OpenRouterwafer$0.33$4.2Source10/02/2026

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.

255075100CodingReasoningMathematicsKnowledgeFinanceLegalAgentic tasksCybersecurity
GPT-5.4
DeepSeek-V4-Pro
Coding: 99.4 / 91.1 (6 benchmark families)
Reasoning: 100 / 98.2 (2 benchmark families)
Mathematics: 100 / 98.6 (1 benchmark family)
Knowledge: 100 / 99.5 (2 benchmark families)
Finance: 100 / 96.6 (3 benchmark families)
Legal: 66.7 / 97.6 (3 benchmark families)
Agentic tasks: 100 / 97.7 (2 benchmark families)
Cybersecurity: 100 / 93.7 (1 benchmark family)

75 matched rows from 17 benchmark families were considered. The radar shows 8 of 10 comparable categories.

GPT-5.4DeepSeek-V4-Pro
Code MigrationOverall. Higher is better. No documented setup difference
GPT-5.4Winner34.984 %
DeepSeek-V4-Pro26.201 %
CorpFin v2Overall. Higher is better. No documented setup difference
GPT-5.4Winner65.268 %
DeepSeek-V4-Pro61.383 %
CyberBench v1.1Patch. Higher is better. No documented setup difference
GPT-5.4Winner81.356 %
DeepSeek-V4-Pro79.661 %
GPQA DiamondOverall. Higher is better. No documented setup difference
GPT-5.4Winner91.666 %
DeepSeek-V4-Pro89.394 %
Harvey's Legal Agent BenchmarkOverall · Task fully resolved. Higher is better. No documented setup difference
GPT-5.40 %
DeepSeek-V4-ProWinner3.75 %
IOIIOI 2024. Higher is better. Test setup not documented as identical
GPT-5.4Higher measured value67.167 %
DeepSeek-V4-Pro31.333 %
LegalBenchOverall. Higher is better. No documented setup difference
GPT-5.4Winner86.044 %
DeepSeek-V4-Pro80.323 %
LiveCodeBench v6Overall. Higher is better. No documented setup difference
GPT-5.484.141 %
DeepSeek-V4-ProWinner87.484 %
LMArena Text, Style ControlOverall. Higher is better. No documented setup difference
GPT-5.4No clear lead1,464.964
DeepSeek-V4-Pro1,457.519
MedCodeOverall. Higher is better. No documented setup difference
GPT-5.4Winner41.292 %
DeepSeek-V4-Pro40.455 %
MedScribeOverall. Higher is better. No documented setup difference
GPT-5.4Winner77.549 %
DeepSeek-V4-Pro75.144 %
MMLU-ProOverall. Higher is better. No documented setup difference
GPT-5.4Winner87.482 %
DeepSeek-V4-Pro87.249 %

Key to the marks:better valuebetter, but not conclusivetie

Benchmark scores for GPT-5.4 and DeepSeek-V4-Pro
Benchmark and taskGPT-5.4DeepSeek-V4-ProSource
Code MigrationOverall
Test details
No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4-2026-03-05
Winner34.984 %
26.201 %
Vals AI
Source details
Data as of: 09/27/2026
CorpFin v2Overall
Test details
No documented difference in the test setupVersion: 2Metric: accuracyScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4-2026-03-05
Winner65.268 %
61.383 %
Vals AI
Source details
Data as of: 08/12/2026
CyberBench v1.1Patch
Test details
No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4-2026-03-05
Winner81.356 %
79.661 %
Vals AI
Source details
Data as of: 08/03/2026
GPQA DiamondOverall
Test details
No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4-2026-03-05
Winner91.666 %
89.394 %
Vals AI
Source details
Data as of: 09/01/2026
Harvey's Legal Agent BenchmarkOverall · Task fully resolved
Test details
No documented difference in the test setupVersion: 1Metric: task resolution rateScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4-2026-03-05
0 %
Winner3.75 %
Vals AI
Source details
Data as of: 09/27/2026
IOIIOI 2024
Test details
Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens
DeepSeek-V4-Pro: Reasoning: max, Output limit: 256,000 tokens
Higher measured value67.167 %
31.333 %
Vals AI
Source details
Data as of: 08/09/2026
LegalBenchOverall
Test details
No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4-2026-03-05
Winner86.044 %
80.323 %
Vals AI
Source details
Data as of: 09/27/2026
LiveCodeBench v6Overall
Test details
No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4-2026-03-05
84.141 %
Winner87.484 %
Vals AI
Source details
Data as of: 09/01/2026
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 betterGPT-5.4: Snapshot: gpt-5.4, Harness: Arena text, style control
DeepSeek-V4-Pro: Snapshot: deepseek-v4-pro, Harness: Arena text, style control
GPT-5.4: Style-controlled Arena rating from 67,632 anonymous pairwise votes.DeepSeek-V4-Pro: Style-controlled Arena rating from 57,564 anonymous pairwise votes.
No clear lead1,464.964
95% confidence interval: ±3.702The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.
1,457.519
95% confidence interval: ±3.905The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.
LMArena
Source details
Data as of: 09/25/2026
MedCodeOverall
Test details
No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4-2026-03-05
Winner41.292 %
40.455 %
Vals AI
Source details
Data as of: 09/26/2026
MedScribeOverall
Test details
No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4-2026-03-05
Winner77.549 %
75.144 %
Vals AI
Source details
Data as of: 09/26/2026
MMLU-ProOverall
Test details
No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4-2026-03-05
Winner87.482 %
87.249 %
Vals AI
Source details
Data as of: 09/01/2026
ProgramBenchOverall
Test details
No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4-2026-03-05
Tie0 %
Tie0 %
Vals AI
Source details
Data as of: 09/27/2026
SkillsBenchOverall
Test details
No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4-2026-03-05, Harness: OpenHands
DeepSeek-V4-Pro: Harness: OpenHands
Winner51.711 %
51.274 %
Vals AI
Source details
Data as of: 09/27/2026
SWE-bench VerifiedOverall
Test details
No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4-2026-03-05
Winner78.2 %
77.4 %
Vals AI
Source details
Data as of: 09/01/2026
TaxEval v2Overall
Test details
No documented difference in the test setupVersion: 2Metric: accuracyScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4-2026-03-05
Winner73.958 %
72.077 %
Vals AI
Source details
Data as of: 09/01/2026
Terminal-Bench 2.0Overall
Test details
No documented difference in the test setupVersion: 2.0Metric: accuracyScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4-2026-03-05
Winner58.427 %
56.18 %
Vals AI
Source details
Data as of: 06/04/2026
Vibe Code Bench v1.1Overall
Test details
No documented difference in the test setupVersion: 1.1Metric: accuracyScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4-2026-03-05, Harness: OpenHands
DeepSeek-V4-Pro: Harness: OpenHands
Winner67.421 %
49.931 %
Vals AI
Source details
Data as of: 09/27/2026
Code MigrationCLI
Test details
Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens
DeepSeek-V4-Pro: Reasoning: max, Output limit: 384,000 tokens
Higher measured value23.788 %
15.47 %
Vals AI
Source details
Data as of: 08/09/2026
CorpFin v2Exact Pages
Test details
Test setup not documented as identicalNo direct winnerVersion: 2Metric: accuracyScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens
DeepSeek-V4-Pro: Reasoning: max, Output limit: 128,000 tokens
Higher measured value64.103 %
59.207 %
Vals AI
Source details
Data as of: 08/06/2026
CyberBench v1.1PoC
Test details
No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4-2026-03-05
Winner64.407 %
57.627 %
Vals AI
Source details
Data as of: 08/03/2026
GPQA DiamondFew-Shot CoT
Test details
Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens
DeepSeek-V4-Pro: Reasoning: max, Output limit: 256,000 tokens
Higher measured value91.414 %
90.404 %
Vals AI
Source details
Data as of: 08/09/2026
Harvey's Legal Agent BenchmarkAntitrust Competition · Criteria passed
Test details
Test setup not documented as identicalNo direct winnerVersion: 1Metric: criteria pass rateScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens
DeepSeek-V4-Pro: Reasoning: max, Output limit: 384,000 tokens
76.449 %
Higher measured value83.696 %
Vals AI
Source details
Data as of: 08/07/2026
IOIIOI 2025
Test details
Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens
DeepSeek-V4-Pro: Reasoning: max, Output limit: 256,000 tokens
Higher measured value68.5 %
40.333 %
Vals AI
Source details
Data as of: 08/09/2026
LegalBenchConclusion Tasks
Test details
Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens
DeepSeek-V4-Pro: Reasoning: max, Output limit: 256,000 tokens
88.939 %
Higher measured value89.117 %
Vals AI
Source details
Data as of: 08/09/2026
LiveCodeBench v6Easy
Test details
Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens
DeepSeek-V4-Pro: Reasoning: max, Output limit: 128,000 tokens
Higher measured value99.068 %
98.758 %
Vals AI
Source details
Data as of: 08/09/2026
LMArena Text, Style ControlOverall
Test details
No documented difference in the test setupVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4-high, Reasoning: high, Harness: Arena text, style control
DeepSeek-V4-Pro: Snapshot: deepseek-v4-pro-high-preview, Reasoning: high, Harness: Arena text, style control
GPT-5.4: Style-controlled Arena rating from 64,479 anonymous pairwise votes.DeepSeek-V4-Pro: Style-controlled Arena rating from 54,884 anonymous pairwise votes.
Winner1,475.198
95% confidence interval: ±3.778The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.
1,454.675
95% confidence interval: ±3.973The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.
LMArena
Source details
Data as of: 09/25/2026
MMLU-ProBiology
Test details
Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens
DeepSeek-V4-Pro: Reasoning: max, Output limit: 256,000 tokens
No direct winner92.887 %
No direct winner92.887 %
Vals AI
Source details
Data as of: 08/09/2026
ProgramBenchAlmost Resolved
Test details
Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens
DeepSeek-V4-Pro: Reasoning: max, Output limit: 384,000 tokens
Higher measured value7 %
0 %
Vals AI
Source details
Data as of: 08/09/2026
SkillsBenchNo Skills
Test details
Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Harness: OpenHands, Output limit: 128,000 tokens
DeepSeek-V4-Pro: Reasoning: max, Harness: OpenHands, Output limit: 384,000 tokens
Higher measured value48.905 %
27.226 %
Vals AI
Source details
Data as of: 08/07/2026
SWE-bench Verified<15 min fix
Test details
Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens
DeepSeek-V4-Pro: Reasoning: max, Output limit: 256,000 tokens
Higher measured value88.144 %
87.629 %
Vals AI
Source details
Data as of: 08/08/2026
TaxEval v2Correctness
Test details
Test setup not documented as identicalNo direct winnerVersion: 2Metric: accuracyScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens
DeepSeek-V4-Pro: Reasoning: max, Output limit: 128,000 tokens
Higher measured value64.922 %
60.589 %
Vals AI
Source details
Data as of: 08/09/2026
Terminal-Bench 2.0Easy
Test details
Test setup not documented as identicalNo direct winnerVersion: 2.0Metric: accuracyScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: high, Output limit: 128,000 tokens
DeepSeek-V4-Pro: Output limit: 128,000 tokens
Higher measured value100 %
75 %
Vals AI
Source details
Data as of: 06/04/2026
Code MigrationCOBOL
Test details
Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens
DeepSeek-V4-Pro: Reasoning: max, Output limit: 384,000 tokens
Higher measured value68.571 %
58.393 %
Vals AI
Source details
Data as of: 08/09/2026
CorpFin v2Max Fitting Context
Test details
Test setup not documented as identicalNo direct winnerVersion: 2Metric: accuracyScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens
DeepSeek-V4-Pro: Reasoning: max, Output limit: 128,000 tokens
Higher measured value64.918 %
63.054 %
Vals AI
Source details
Data as of: 08/06/2026
GPQA DiamondZero-Shot CoT
Test details
Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens
DeepSeek-V4-Pro: Reasoning: max, Output limit: 256,000 tokens
Higher measured value91.919 %
88.384 %
Vals AI
Source details
Data as of: 08/09/2026
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 betterGPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens
DeepSeek-V4-Pro: Reasoning: max, Output limit: 384,000 tokens
No direct winner0 %
No direct winner0 %
Vals AI
Source details
Data as of: 08/07/2026
LegalBenchInterpretation Tasks
Test details
Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens
DeepSeek-V4-Pro: Reasoning: max, Output limit: 256,000 tokens
Higher measured value83.921 %
75.169 %
Vals AI
Source details
Data as of: 08/09/2026
LiveCodeBench v6Hard
Test details
Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens
DeepSeek-V4-Pro: Reasoning: max, Output limit: 128,000 tokens
67.714 %
Higher measured value72.571 %
Vals AI
Source details
Data as of: 08/09/2026
LMArena Text, Style ControlBusiness, management and finance
Test details
No documented difference in the test setupVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4, Harness: Arena text, style control
DeepSeek-V4-Pro: Snapshot: deepseek-v4-pro, Harness: Arena text, style control
GPT-5.4: Style-controlled Arena rating from 13,882 anonymous pairwise votes.DeepSeek-V4-Pro: Style-controlled Arena rating from 11,411 anonymous pairwise votes.
Winner1,474.623
95% confidence interval: ±6.376The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.
1,459.704
95% confidence interval: ±6.73The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.
LMArena
Source details
Data as of: 09/25/2026
MMLU-ProBusiness
Test details
Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens
DeepSeek-V4-Pro: Reasoning: max, Output limit: 256,000 tokens
91.762 %
Higher measured value91.888 %
Vals AI
Source details
Data as of: 08/09/2026
ProgramBenchFully Resolved
Test details
Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens
DeepSeek-V4-Pro: Reasoning: max, Output limit: 384,000 tokens
No direct winner0 %
No direct winner0 %
Vals AI
Source details
Data as of: 08/09/2026
SkillsBenchWith Skills
Test details
Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Harness: OpenHands, Output limit: 128,000 tokens
DeepSeek-V4-Pro: Reasoning: max, Harness: OpenHands, Output limit: 384,000 tokens
Higher measured value51.711 %
51.274 %
Vals AI
Source details
Data as of: 08/07/2026
SWE-bench Verified>4 hours
Test details
Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens
DeepSeek-V4-Pro: Reasoning: max, Output limit: 256,000 tokens
No direct winner0 %
No direct winner0 %
Vals AI
Source details
Data as of: 08/08/2026
TaxEval v2Stepwise Reasoning
Test details
Test setup not documented as identicalNo direct winnerVersion: 2Metric: accuracyScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens
DeepSeek-V4-Pro: Reasoning: max, Output limit: 128,000 tokens
82.993 %
Higher measured value83.565 %
Vals AI
Source details
Data as of: 08/09/2026
Terminal-Bench 2.0Hard
Test details
Test setup not documented as identicalNo direct winnerVersion: 2.0Metric: accuracyScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: high, Output limit: 128,000 tokens
DeepSeek-V4-Pro: Output limit: 128,000 tokens
No direct winner33.333 %
No direct winner33.333 %
Vals AI
Source details
Data as of: 06/04/2026
Code MigrationCode Quality
Test details
Test setup not documented as identicalNo direct winnerVersion: 1Metric: mean reviewer code-quality ratingScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens
DeepSeek-V4-Pro: Reasoning: max, Output limit: 384,000 tokens
Higher measured value3.632 / 5
3.401 / 5
Vals AI
Source details
Data as of: 08/09/2026
CorpFin v2Shared Max Context
Test details
Test setup not documented as identicalNo direct winnerVersion: 2Metric: accuracyScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens
DeepSeek-V4-Pro: Reasoning: max, Output limit: 128,000 tokens
Higher measured value66.783 %
61.888 %
Vals AI
Source details
Data as of: 08/06/2026
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 betterGPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens
DeepSeek-V4-Pro: Reasoning: max, Output limit: 384,000 tokens
66.667 %
Higher measured value83.512 %
Vals AI
Source details
Data as of: 08/07/2026
LegalBenchIssue Tasks
Test details
Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens
DeepSeek-V4-Pro: Reasoning: max, Output limit: 256,000 tokens
Higher measured value90.526 %
84.587 %
Vals AI
Source details
Data as of: 08/09/2026
LiveCodeBench v6Medium
Test details
Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens
DeepSeek-V4-Pro: Reasoning: max, Output limit: 128,000 tokens
85.64 %
Higher measured value91.123 %
Vals AI
Source details
Data as of: 08/09/2026
LMArena Text, Style ControlBusiness, management and finance
Test details
No documented difference in the test setupVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4-high, Reasoning: high, Harness: Arena text, style control
DeepSeek-V4-Pro: Snapshot: deepseek-v4-pro-high-preview, Reasoning: high, Harness: Arena text, style control
GPT-5.4: Style-controlled Arena rating from 13,092 anonymous pairwise votes.DeepSeek-V4-Pro: Style-controlled Arena rating from 11,076 anonymous pairwise votes.
Winner1,481.559
95% confidence interval: ±6.485The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.
1,448.077
95% confidence interval: ±6.825The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.
LMArena
Source details
Data as of: 09/25/2026
MMLU-ProChemistry
Test details
Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens
DeepSeek-V4-Pro: Reasoning: max, Output limit: 256,000 tokens
91.078 %
Higher measured value92.491 %
Vals AI
Source details
Data as of: 08/09/2026
ProgramBenchRaw Pass Rate
Test details
Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens
DeepSeek-V4-Pro: Reasoning: max, Output limit: 384,000 tokens
Higher measured value68.596 %
47.778 %
Vals AI
Source details
Data as of: 08/09/2026
SWE-bench Verified1-4 hours
Test details
Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens
DeepSeek-V4-Pro: Reasoning: max, Output limit: 256,000 tokens
Higher measured value50 %
45.238 %
Vals AI
Source details
Data as of: 08/08/2026
Terminal-Bench 2.0Medium
Test details
Test setup not documented as identicalNo direct winnerVersion: 2.0Metric: accuracyScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: high, Output limit: 128,000 tokens
DeepSeek-V4-Pro: Output limit: 128,000 tokens
Higher measured value69.091 %
67.273 %
Vals AI
Source details
Data as of: 06/04/2026
Harvey's Legal Agent BenchmarkArbitration International Dispute Resolution · Task fully resolved
Test details
Test setup not documented as identicalNo direct winnerVersion: 1Metric: task resolution rateScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens
DeepSeek-V4-Pro: Reasoning: max, Output limit: 384,000 tokens
No direct winner0 %
No direct winner0 %
Vals AI
Source details
Data as of: 08/07/2026
LegalBenchRhetoric Tasks
Test details
Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens
DeepSeek-V4-Pro: Reasoning: max, Output limit: 256,000 tokens
Higher measured value82.824 %
75.316 %
Vals AI
Source details
Data as of: 08/09/2026
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 betterGPT-5.4: Snapshot: gpt-5.4, Harness: Arena text, style control
DeepSeek-V4-Pro: Snapshot: deepseek-v4-pro, Harness: Arena text, style control
GPT-5.4: Style-controlled Arena rating from 4,364 anonymous pairwise votes.DeepSeek-V4-Pro: Style-controlled Arena rating from 3,408 anonymous pairwise votes.
No clear lead1,493.153
95% confidence interval: ±9.833The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.
1,488.151
95% confidence interval: ±10.761The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.
LMArena
Source details
Data as of: 09/25/2026
MMLU-ProComputer Science
Test details
Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens
DeepSeek-V4-Pro: Reasoning: max, Output limit: 256,000 tokens
Higher measured value89.756 %
89.024 %
Vals AI
Source details
Data as of: 08/09/2026
SWE-bench Verified15 min - 1 hour
Test details
Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens
DeepSeek-V4-Pro: Reasoning: max, Output limit: 256,000 tokens
Higher measured value76.245 %
75.862 %
Vals AI
Source details
Data as of: 08/08/2026
Harvey's Legal Agent BenchmarkBanking Finance · Criteria passed
Test details
Test setup not documented as identicalNo direct winnerVersion: 1Metric: criteria pass rateScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens
DeepSeek-V4-Pro: Reasoning: max, Output limit: 384,000 tokens
80.297 %
Higher measured value86.245 %
Vals AI
Source details
Data as of: 08/07/2026
LegalBenchRule Tasks
Test details
Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens
DeepSeek-V4-Pro: Reasoning: max, Output limit: 256,000 tokens
Higher measured value84.008 %
77.425 %
Vals AI
Source details
Data as of: 08/09/2026
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 betterGPT-5.4: Snapshot: gpt-5.4-high, Reasoning: high, Harness: Arena text, style control
DeepSeek-V4-Pro: Snapshot: deepseek-v4-pro-high-preview, Reasoning: high, Harness: Arena text, style control
GPT-5.4: Style-controlled Arena rating from 4,159 anonymous pairwise votes.DeepSeek-V4-Pro: Style-controlled Arena rating from 3,360 anonymous pairwise votes.
No clear lead1,506.812
95% confidence interval: ±10.001The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.
1,499.718
95% confidence interval: ±10.912The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.
LMArena
Source details
Data as of: 09/25/2026

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 first attempt, with no subsequent fixes to the generated code. These results do not contribute to an overall score.

Pelican on a bicycle

A community classic for free-form SVG drawing.

GPT-5.4

API access was unavailable for this run. The model was not evaluated.

Reasoning (requested): high

First attempt
Run date
7 Sept 2026
API provider
openrouter
Requested API model
openai/gpt-5.4
Reasoning setting
high
Pinned endpoint
OpenAI | openai/gpt-5.4-20260305
Temperature
Provider default
Token limit including reasoning
8,192 tokens
Test protocol
community-visual-tests-v1
Technical checks
Not run

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

DeepSeek-V4-Pro

API access was unavailable for this run. The model was not evaluated.

Reasoning (requested): high

First attempt
Run date
7 Sept 2026
API provider
openrouter
Requested API model
deepseek/deepseek-v4-pro-0813
Reasoning setting
high
Pinned endpoint
DeepSeek | deepseek/deepseek-v4-pro-20260813
Temperature
Provider default
Token limit including reasoning
8,192 tokens
Test protocol
community-visual-tests-v1
Technical checks
Not run

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

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 GPT-5.4 and DeepSeek-V4-Pro with other leading models using the same data and benchmark logic.

View the complete LLM comparison