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Head-to-head comparison

GPT-5.6 Terra vs. GPT-5.4

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

shared result series
174
distinct benchmarks
19
latest retrieval
2026-09-04

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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-5.6 Terra and GPT-5.4
AttributeGPT-5.6 TerraGPT-5.4
ProviderOpenAIOpenAI
ReleasedJun 26, 2026Mar 2026
AvailabilityActiveActive
Model typeProprietaryProprietary
ParametersNot publishedNot published
ArchitectureNot publishedNot published
Context window1,050,000 tokens1,050,000 tokens
Knowledge cutoffFebruary 16, 2026August 31, 2025
Technical sourcesModel, Context, Knowledge cutoffModel

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-5.6 Terra and GPT-5.4
Price typeGPT-5.6 TerraGPT-5.4
API input$2 ≤272K / $4 >272K$2.5 ≤272K / $5 >272K
API output$12 ≤272K / $18 >272K$15 ≤272K / $22.5 >272K
Cache read$0.2 ≤272K / $0.4 >272K$0.25 ≤272K / $0.5 >272K
Cache write (5 min.)$2.5 ≤272K / $5 >272KNot listed
Cache write (1 hr.)Not listedNot listed
Price verified08/11/2026 Source07/30/2026 Source
GPT-5.6 TerraGPT-5.4
API inputUSD per 1M tokens, base tier
GPT-5.6 TerraLower price$2
GPT-5.4$2.5
API outputUSD per 1M tokens, base tier
GPT-5.6 TerraLower price$12
GPT-5.4$15
Cache readUSD per 1M tokens, base tier
GPT-5.6 TerraLower price$0.2
GPT-5.4$0.25

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-5.6 Terra and GPT-5.4
ModelProviderPurchase route and tariffInput per 1M tokensOutput per 1M tokensSource
GPT-5.6 TerraOpenAIDirect from developerUp to 272,000 context tokens$2$12Source08/11/2026
OpenAIDirect from developerAbove 272,000 context tokens$4$18Source08/11/2026
Amazon BedrockVia OpenRouteramazon-bedrock/us-east-1$2.2$13.2Source09/06/2026
AzureVia OpenRouterazure$2$12Source09/06/2026
AzureVia OpenRouterazure/eu$2.2$13.2Source09/06/2026
AzureVia OpenRouterazure/us$2.2$13.2Source09/06/2026
OpenAIVia OpenRouteropenai$2$12Source09/06/2026
OpenAIVia OpenRouteropenai/fast$4$24Source09/06/2026
OpenAIVia OpenRouteropenai/flexLowest listed price: $1Lowest listed price: $6Source09/06/2026
GPT-5.4OpenAIDirect from developerUp to 272,000 context tokens$2.5$15Source07/30/2026
OpenAIDirect from developerAbove 272,000 context tokens$5$22.5Source07/30/2026
Amazon BedrockVia OpenRouteramazon-bedrock/us-east-1$2.75$16.5Source09/06/2026
AzureVia OpenRouterazure$2.5$15Source09/06/2026
AzureVia OpenRouterazure/eu$2.75$16.5Source09/06/2026
AzureVia OpenRouterazure/us$2.75$16.5Source09/06/2026
OpenAIVia OpenRouteropenai$2.5$15Source09/06/2026
OpenAIVia OpenRouteropenai/fast$5$30Source09/06/2026
OpenAIVia OpenRouteropenai/flexLowest listed price: $1.25Lowest listed price: $7.5Source09/06/2026

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.

255075100CodingReasoningKnowledgeFinanceLegalAgentic tasksMultimodalHealth
GPT-5.6 Terra
GPT-5.4
Coding: 97.9 / 83.3 (6 benchmark families)
Reasoning: 99.2 / 100 (1 benchmark family)
Knowledge: 98.9 / 99.8 (1 benchmark family)
Finance: 99.4 / 98.9 (3 benchmark families)
Legal: 99.3 / 97.6 (2 benchmark families)
Agentic tasks: 96.8 / 91 (1 benchmark family)
Multimodal: 98.8 / 100 (1 benchmark family)
Health: 100 / 94.3 (2 benchmark families)

116 matched rows from 18 benchmark families were considered. The radar shows 8 of 9 comparable categories.

GPT-5.6 TerraGPT-5.4
Code MigrationOverall. Higher is better. No documented setup difference
GPT-5.6 TerraWinner47.804 %
GPT-5.434.984 %
CorpFin v2Overall. Higher is better. No documented setup difference
GPT-5.6 TerraWinner65.307 %
GPT-5.465.268 %
GPQA DiamondOverall. Higher is better. No documented setup difference
GPT-5.6 Terra90.909 %
GPT-5.4Winner91.666 %
Harvey's Legal Agent BenchmarkOverall · Task fully resolved. Higher is better. No documented setup difference
GPT-5.6 TerraWinner0.833 %
GPT-5.40 %
IOIOverall. Higher is better. No documented setup difference
GPT-5.6 Terra65.25 %
GPT-5.4Winner67.834 %
LegalBenchOverall. Higher is better. No documented setup difference
GPT-5.6 Terra85.105 %
GPT-5.4Winner86.044 %
LiveCodeBench v6Overall. Higher is better. No documented setup difference
GPT-5.6 TerraWinner85.93 %
GPT-5.484.141 %
LMArena Text, Style ControlOverall. Higher is better. Test setup not documented as identical
GPT-5.6 TerraHigher measured value1,466.233
GPT-5.41,465.527
MedCodeOverall. Higher is better. No documented setup difference
GPT-5.6 TerraWinner43.414 %
GPT-5.441.292 %
MedScribeOverall. Higher is better. No documented setup difference
GPT-5.6 TerraWinner82.869 %
GPT-5.477.549 %
MMLU-ProOverall. Higher is better. No documented setup difference
GPT-5.6 Terra86.659 %
GPT-5.4Winner87.482 %
MMMU-ProOverall. Higher is better. No documented setup difference
GPT-5.6 Terra86.474 %
GPT-5.4Winner87.514 %

Key to the marks:better valuebetter, but not conclusivetie

Benchmark scores for GPT-5.6 Terra and GPT-5.4
Benchmark and taskGPT-5.6 TerraGPT-5.4Source
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
Winner47.804 %
34.984 %
Vals AI
Source details
Data as of: 09/03/2026
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
Winner65.307 %
65.268 %
Vals AI
Source details
Data as of: 08/12/2026
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
90.909 %
Winner91.666 %
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
Winner0.833 %
0 %
Vals AI
Source details
Data as of: 09/03/2026
IOIOverall
Test details
No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4-2026-03-05
65.25 %
Winner67.834 %
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
85.105 %
Winner86.044 %
Vals AI
Source details
Data as of: 09/01/2026
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
Winner85.93 %
84.141 %
Vals AI
Source details
Data as of: 09/01/2026
LMArena Text, Style ControlOverall
Test details
Test setup not documented as identicalNo direct winnerVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterGPT-5.6 Terra: Snapshot: gpt-5.6-terra-xhigh, Reasoning: xhigh, Harness: Arena text, style control
GPT-5.4: Snapshot: gpt-5.4, Harness: Arena text, style controlGPT-5.6 Terra: Style-controlled Arena rating from 23,942 anonymous pairwise votes.GPT-5.4: Style-controlled Arena rating from 63,615 anonymous pairwise votes.
Higher measured value1,466.233
95% confidence interval: ±5.062The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.
1,465.527
95% confidence interval: ±3.807The 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: 09/01/2026
MedCodeOverall
Test details
No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4-2026-03-05
Winner43.414 %
41.292 %
Vals AI
Source details
Data as of: 09/03/2026
MedScribeOverall
Test details
No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4-2026-03-05
Winner82.869 %
77.549 %
Vals AI
Source details
Data as of: 09/03/2026
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
86.659 %
Winner87.482 %
Vals AI
Source details
Data as of: 09/01/2026
MMMU-ProOverall
Test details
No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4-2026-03-05
86.474 %
Winner87.514 %
Vals AI
Source details
Data as of: 09/01/2026
MortgageTaxOverall
Test details
No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4-2026-03-05
67.329 %
Winner68.323 %
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
Winner0.5 %
0 %
Vals AI
Source details
Data as of: 09/01/2026
SAGEOverall
Test details
No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.4: Snapshot: gpt-5.4-2026-03-05
Winner47.003 %
43.312 %
Vals AI
Source details
Data as of: 09/03/2026
SkillsBenchOverall
Test details
No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.6 Terra: Harness: OpenHands
GPT-5.4: Snapshot: gpt-5.4-2026-03-05, Harness: OpenHands
Winner58.895 %
51.711 %
Vals AI
Source details
Data as of: 09/01/2026
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
Winner95.4 %
78.2 %
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
Winner76.166 %
73.958 %
Vals AI
Source details
Data as of: 09/01/2026
Vibe Code Bench v1.1Overall
Test details
No documented difference in the test setupVersion: 1.1Metric: accuracyScoring: Higher is betterGPT-5.6 Terra: Harness: OpenHands
GPT-5.4: Snapshot: gpt-5.4-2026-03-05, Harness: OpenHands
Winner74.594 %
67.421 %
Vals AI
Source details
Data as of: 09/03/2026
Code MigrationCLI
Test details
No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.6 Terra: Reasoning: xhigh, Output limit: 128,000 tokens
GPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens
Winner26.645 %
23.788 %
Vals AI
Source details
Data as of: 08/09/2026
CorpFin v2Exact Pages
Test details
No documented difference in the test setupVersion: 2Metric: accuracyScoring: Higher is betterGPT-5.6 Terra: Reasoning: xhigh, Output limit: 128,000 tokens
GPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens
63.17 %
Winner64.103 %
Vals AI
Source details
Data as of: 08/06/2026
GPQA DiamondFew-Shot CoT
Test details
No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.6 Terra: Reasoning: xhigh, Output limit: 128,000 tokens
GPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens
89.899 %
Winner91.414 %
Vals AI
Source details
Data as of: 08/09/2026
Harvey's Legal Agent BenchmarkAntitrust Competition · Criteria passed
Test details
No documented difference in the test setupVersion: 1Metric: criteria pass rateScoring: Higher is betterGPT-5.6 Terra: Reasoning: xhigh, Output limit: 128,000 tokens
GPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens
Tie76.449 %
Tie76.449 %
Vals AI
Source details
Data as of: 08/07/2026
IOIIOI 2024
Test details
No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.6 Terra: Reasoning: xhigh, Output limit: 128,000 tokens
GPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens
66.167 %
Winner67.167 %
Vals AI
Source details
Data as of: 08/09/2026
LegalBenchConclusion Tasks
Test details
No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.6 Terra: Reasoning: xhigh, Output limit: 128,000 tokens
GPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens
Winner90.327 %
88.939 %
Vals AI
Source details
Data as of: 08/09/2026
LiveCodeBench v6Easy
Test details
No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.6 Terra: Reasoning: xhigh, Output limit: 128,000 tokens
GPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens
97.205 %
Winner99.068 %
Vals AI
Source details
Data as of: 08/09/2026
LMArena Text, Style ControlOverall
Test details
Test setup not documented as identicalNo direct winnerVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterGPT-5.6 Terra: Snapshot: gpt-5.6-terra-xhigh, Reasoning: xhigh, Harness: Arena text, style control
GPT-5.4: Snapshot: gpt-5.4-high, Reasoning: high, Harness: Arena text, style controlGPT-5.6 Terra: Style-controlled Arena rating from 23,942 anonymous pairwise votes.GPT-5.4: Style-controlled Arena rating from 60,657 anonymous pairwise votes.
1,466.233
95% confidence interval: ±5.062The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.
Higher measured value1,476.488
95% confidence interval: ±3.881The 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: 09/01/2026
MMLU-ProBiology
Test details
No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.6 Terra: Reasoning: xhigh, Output limit: 128,000 tokens
GPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens
Winner93.026 %
92.887 %
Vals AI
Source details
Data as of: 08/09/2026
MortgageTaxNumerical Extraction
Test details
No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.6 Terra: Reasoning: xhigh, Output limit: 128,000 tokens
GPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens
74.324 %
Winner75.994 %
Vals AI
Source details
Data as of: 08/09/2026
ProgramBenchAlmost Resolved
Test details
No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.6 Terra: Reasoning: xhigh, Output limit: 128,000 tokens
GPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens
6.5 %
Winner7 %
Vals AI
Source details
Data as of: 08/09/2026
SAGEAutomata
Test details
No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.6 Terra: Reasoning: xhigh, Output limit: 30,000 tokens
GPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 30,000 tokens
Winner38.889 %
21.428 %
Vals AI
Source details
Data as of: 08/09/2026
SkillsBenchNo Skills
Test details
No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.6 Terra: Reasoning: xhigh, Harness: OpenHands, Output limit: 128,000 tokens
GPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Harness: OpenHands, Output limit: 128,000 tokens
44.208 %
Winner48.905 %
Vals AI
Source details
Data as of: 08/07/2026
SWE-bench Verified<15 min fix
Test details
No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.6 Terra: Reasoning: xhigh, Output limit: 128,000 tokens
GPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens
77.835 %
Winner88.144 %
Vals AI
Source details
Data as of: 08/08/2026
TaxEval v2Correctness
Test details
No documented difference in the test setupVersion: 2Metric: accuracyScoring: Higher is betterGPT-5.6 Terra: Reasoning: xhigh, Output limit: 128,000 tokens
GPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens
Winner65.822 %
64.922 %
Vals AI
Source details
Data as of: 08/09/2026
Code MigrationCOBOL
Test details
No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.6 Terra: Reasoning: xhigh, Output limit: 128,000 tokens
GPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens
65.844 %
Winner68.571 %
Vals AI
Source details
Data as of: 08/09/2026
CorpFin v2Max Fitting Context
Test details
No documented difference in the test setupVersion: 2Metric: accuracyScoring: Higher is betterGPT-5.6 Terra: Reasoning: xhigh, Output limit: 128,000 tokens
GPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens
Winner66.317 %
64.918 %
Vals AI
Source details
Data as of: 08/06/2026
GPQA DiamondZero-Shot CoT
Test details
No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.6 Terra: Reasoning: xhigh, Output limit: 128,000 tokens
GPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens
Tie91.919 %
Tie91.919 %
Vals AI
Source details
Data as of: 08/09/2026
Harvey's Legal Agent BenchmarkAntitrust Competition · Task fully resolved
Test details
No documented difference in the test setupVersion: 1Metric: task resolution rateScoring: Higher is betterGPT-5.6 Terra: Reasoning: xhigh, Output limit: 128,000 tokens
GPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens
Tie0 %
Tie0 %
Vals AI
Source details
Data as of: 08/07/2026
IOIIOI 2025
Test details
No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.6 Terra: Reasoning: xhigh, Output limit: 128,000 tokens
GPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens
64.333 %
Winner68.5 %
Vals AI
Source details
Data as of: 08/09/2026
LegalBenchInterpretation Tasks
Test details
No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.6 Terra: Reasoning: xhigh, Output limit: 128,000 tokens
GPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens
83.178 %
Winner83.921 %
Vals AI
Source details
Data as of: 08/09/2026
LiveCodeBench v6Hard
Test details
No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.6 Terra: Reasoning: xhigh, Output limit: 128,000 tokens
GPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens
Winner72.857 %
67.714 %
Vals AI
Source details
Data as of: 08/09/2026
LMArena Text, Style ControlBusiness, management and finance
Test details
Test setup not documented as identicalNo direct winnerVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterGPT-5.6 Terra: Snapshot: gpt-5.6-terra-xhigh, Reasoning: xhigh, Harness: Arena text, style control
GPT-5.4: Snapshot: gpt-5.4, Harness: Arena text, style controlGPT-5.6 Terra: Style-controlled Arena rating from 4,559 anonymous pairwise votes.GPT-5.4: Style-controlled Arena rating from 13,060 anonymous pairwise votes.
1,467.133
95% confidence interval: ±9.403The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.
Higher measured value1,474.871
95% confidence interval: ±6.534The 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: 09/01/2026
MMLU-ProBusiness
Test details
No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.6 Terra: Reasoning: xhigh, Output limit: 128,000 tokens
GPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens
90.875 %
Winner91.762 %
Vals AI
Source details
Data as of: 08/09/2026
MortgageTaxSemantic Extraction
Test details
No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.6 Terra: Reasoning: xhigh, Output limit: 128,000 tokens
GPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens
60.334 %
Winner60.652 %
Vals AI
Source details
Data as of: 08/09/2026
ProgramBenchFully Resolved
Test details
No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.6 Terra: Reasoning: xhigh, Output limit: 128,000 tokens
GPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens
Winner0.5 %
0 %
Vals AI
Source details
Data as of: 08/09/2026
SAGECalculus
Test details
No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.6 Terra: Reasoning: xhigh, Output limit: 30,000 tokens
GPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 30,000 tokens
59.259 %
Winner70.988 %
Vals AI
Source details
Data as of: 08/09/2026
SkillsBenchWith Skills
Test details
No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.6 Terra: Reasoning: xhigh, Harness: OpenHands, Output limit: 128,000 tokens
GPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Harness: OpenHands, Output limit: 128,000 tokens
Winner60.645 %
51.711 %
Vals AI
Source details
Data as of: 08/07/2026
SWE-bench Verified>4 hours
Test details
No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.6 Terra: Reasoning: xhigh, Output limit: 128,000 tokens
GPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens
Winner33.333 %
0 %
Vals AI
Source details
Data as of: 08/08/2026
TaxEval v2Stepwise Reasoning
Test details
No documented difference in the test setupVersion: 2Metric: accuracyScoring: Higher is betterGPT-5.6 Terra: Reasoning: xhigh, Output limit: 128,000 tokens
GPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens
Winner86.509 %
82.993 %
Vals AI
Source details
Data as of: 08/09/2026
Code MigrationCode Quality
Test details
No documented difference in the test setupVersion: 1Metric: mean reviewer code-quality ratingScoring: Higher is betterGPT-5.6 Terra: Reasoning: xhigh, Output limit: 128,000 tokens
GPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens
3.305 / 5
Winner3.632 / 5
Vals AI
Source details
Data as of: 08/09/2026
CorpFin v2Shared Max Context
Test details
No documented difference in the test setupVersion: 2Metric: accuracyScoring: Higher is betterGPT-5.6 Terra: Reasoning: xhigh, Output limit: 128,000 tokens
GPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens
66.434 %
Winner66.783 %
Vals AI
Source details
Data as of: 08/06/2026
Harvey's Legal Agent BenchmarkArbitration International Dispute Resolution · Criteria passed
Test details
No documented difference in the test setupVersion: 1Metric: criteria pass rateScoring: Higher is betterGPT-5.6 Terra: Reasoning: xhigh, Output limit: 128,000 tokens
GPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens
Winner74.552 %
66.667 %
Vals AI
Source details
Data as of: 08/07/2026
LegalBenchIssue Tasks
Test details
No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.6 Terra: Reasoning: xhigh, Output limit: 128,000 tokens
GPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens
89.392 %
Winner90.526 %
Vals AI
Source details
Data as of: 08/09/2026
LiveCodeBench v6Medium
Test details
No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.6 Terra: Reasoning: xhigh, Output limit: 128,000 tokens
GPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens
Winner87.728 %
85.64 %
Vals AI
Source details
Data as of: 08/09/2026
LMArena Text, Style ControlBusiness, management and finance
Test details
Test setup not documented as identicalNo direct winnerVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterGPT-5.6 Terra: Snapshot: gpt-5.6-terra-xhigh, Reasoning: xhigh, Harness: Arena text, style control
GPT-5.4: Snapshot: gpt-5.4-high, Reasoning: high, Harness: Arena text, style controlGPT-5.6 Terra: Style-controlled Arena rating from 4,559 anonymous pairwise votes.GPT-5.4: Style-controlled Arena rating from 12,346 anonymous pairwise votes.
1,467.133
95% confidence interval: ±9.403The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.
Higher measured value1,483.779
95% confidence interval: ±6.654The 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: 09/01/2026
MMLU-ProChemistry
Test details
No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.6 Terra: Reasoning: xhigh, Output limit: 128,000 tokens
GPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens
90.194 %
Winner91.078 %
Vals AI
Source details
Data as of: 08/09/2026
ProgramBenchRaw Pass Rate
Test details
No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.6 Terra: Reasoning: xhigh, Output limit: 128,000 tokens
GPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens
66.313 %
Winner68.596 %
Vals AI
Source details
Data as of: 08/09/2026
SAGELinear Algebra
Test details
No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.6 Terra: Reasoning: xhigh, Output limit: 30,000 tokens
GPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 30,000 tokens
64.025 %
Winner68.826 %
Vals AI
Source details
Data as of: 08/09/2026
SWE-bench Verified1-4 hours
Test details
No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.6 Terra: Reasoning: xhigh, Output limit: 128,000 tokens
GPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens
Winner64.286 %
50 %
Vals AI
Source details
Data as of: 08/08/2026
Harvey's Legal Agent BenchmarkArbitration International Dispute Resolution · Task fully resolved
Test details
No documented difference in the test setupVersion: 1Metric: task resolution rateScoring: Higher is betterGPT-5.6 Terra: Reasoning: xhigh, Output limit: 128,000 tokens
GPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens
Tie0 %
Tie0 %
Vals AI
Source details
Data as of: 08/07/2026
LegalBenchRhetoric Tasks
Test details
No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.6 Terra: Reasoning: xhigh, Output limit: 128,000 tokens
GPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens
82.098 %
Winner82.824 %
Vals AI
Source details
Data as of: 08/09/2026
LMArena Text, Style ControlChinese
Test details
Test setup not documented as identicalNo direct winnerVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterGPT-5.6 Terra: Snapshot: gpt-5.6-terra-xhigh, Reasoning: xhigh, Harness: Arena text, style control
GPT-5.4: Snapshot: gpt-5.4, Harness: Arena text, style controlGPT-5.6 Terra: Style-controlled Arena rating from 1,627 anonymous pairwise votes.GPT-5.4: Style-controlled Arena rating from 3,684 anonymous pairwise votes.
Higher measured value1,518.544
95% confidence interval: ±15.369The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result.
1,494.074
95% confidence interval: ±10.702The 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: 09/01/2026
MMLU-ProComputer Science
Test details
No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.6 Terra: Reasoning: xhigh, Output limit: 128,000 tokens
GPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 128,000 tokens
Winner90.976 %
89.756 %
Vals AI
Source details
Data as of: 08/09/2026
SAGEPartial Differential Equations
Test details
No documented difference in the test setupVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.6 Terra: Reasoning: xhigh, Output limit: 30,000 tokens
GPT-5.4: Snapshot: gpt-5.4-2026-03-05, Reasoning: xhigh, Output limit: 30,000 tokens
38.095 %
Winner39.683 %
Vals AI
Source details
Data as of: 08/09/2026

Key to the marks:better valuebetter, but not conclusivetie

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.

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