Head-to-head comparison
GPT-5.6 Terra vs. GPT-5.5
Compare published benchmark results from matching versions and cohorts, API pricing, and technical specifications. Any documented test setup differences remain visible.
238
shared result series
27
distinct benchmarks
2026-08-16
latest retrieval
Change model selection
Specifications and cost
General specifications and standard API pricing
Undisclosed parameter counts and knowledge cutoffs stay marked as unavailable. The table shows direct standard token pricing, including documented context tiers. Batch, fast, priority, regional surcharges, tool calls, and cloud platform pricing are excluded.
| Attribute | GPT-5.6 Terra | GPT-5.5 |
|---|---|---|
| Provider | OpenAI | OpenAI |
| Released | Jun 26, 2026 | Apr 2026 |
| Availability | Active | Active |
| Model type | Proprietary | Proprietary |
| Parameters | Not published | Not published |
| Architecture | Not published | Not published |
| Context window | 1,050,000 tokens | 1,050,000 tokens |
| Knowledge cutoff | February 16, 2026 | December 1, 2025 |
| Technical sources | Model, Context, Knowledge cutoff | Model |
| API pricing per 1M tokens | ||
| API input | $2 ≤272K / $4 >272K | $5 ≤272K / $10 >272K |
| API output | $12 ≤272K / $18 >272K | $30 ≤272K / $45 >272K |
| Cache read | $0.2 ≤272K / $0.4 >272K | $0.5 ≤272K / $1 >272K |
| Cache write (5 min.) | $2.5 ≤272K / $5 >272K | Not listed |
| Cache write (1 hr.) | Not listed | Not listed |
| Price verified | 08/11/2026Source | 07/30/2026Source |
GPT-5.6 TerraGPT-5.5
API inputUSD per 1M tokens, base tier
GPT-5.6 Terra$2Lower price
GPT-5.5$5
API outputUSD per 1M tokens, base tier
GPT-5.6 Terra$12Lower price
GPT-5.5$30
Cache readUSD per 1M tokens, base tier
GPT-5.6 Terra$0.2Lower price
GPT-5.5$0.5
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.
238 shared result series
GPT-5.6 TerraGPT-5.5
Arena Text, Style ControlOverall. Higher is better. Test setup not documented as identical
GPT-5.6 Terra1,464.935 arena points
GPT-5.51,476.591 arena pointsHigher measured value
BrowseCompOverall. Higher is better. No documented setup difference
GPT-5.6 Terra87.5 %Winner
GPT-5.584.4 %
Code MigrationOverall. Higher is better. No documented setup difference
GPT-5.6 Terra36.445 %
GPT-5.545.161 %Winner
CorpFin v2Overall. Higher is better. No documented setup difference
GPT-5.6 Terra65.307 %
GPT-5.568.415 %Winner
EMBOverall. Higher is better. No documented setup difference
GPT-5.6 Terra67.614 %Winner
GPT-5.564.543 %
Finance Agent (v2)Overall. Higher is better. No documented setup difference
GPT-5.6 Terra52.42 %Winner
GPT-5.551.76 %
GPQA DiamondOverall. Higher is better. No documented setup difference
GPT-5.6 Terra90.909 %
GPT-5.593.182 %Winner
Harvey's Legal Agent BenchmarkOverall · Task fully resolved. Higher is better. No documented setup difference
GPT-5.6 Terra0.417 %
GPT-5.53.75 %Winner
Legal Research BenchOverall · All-pass. Higher is better. No documented setup difference
GPT-5.6 Terra40.865 %Winner
GPT-5.540.385 %
LegalBenchOverall. Higher is better. No documented setup difference
GPT-5.6 Terra85.105 %
GPT-5.586.515 %Winner
LiveBenchOverall. Higher is better. No documented setup difference
GPT-5.6 Terra79.8 points
GPT-5.579.9 pointsWinner
LiveCodeBench v6Overall. Higher is better. No documented setup difference
GPT-5.6 Terra85.93 %Winner
GPT-5.585.296 %
| Benchmark and task | GPT-5.6 Terra | GPT-5.5 | Comparability | Source |
|---|---|---|---|---|
| Arena Text, Style ControlOverall | 1,464.935 arena points 95% confidence interval: ±5.686The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | 1,476.591 arena pointsHigher measured value 95% confidence interval: ±4.028The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | style-control-v1style-controlled Bradley-Terry ratingHigher is betterCohort: lmarena-text-style-control:2026-08-12:overallTest setup not documented as identicalNo direct winnerGPT-5.6 Terra: Snapshot: gpt-5.6-terra-xhigh, Reasoning: xhigh, Harness: Arena text, style control GPT-5.5: Snapshot: gpt-5.5, Harness: Arena text, style controlGPT-5.6 Terra: Style-controlled Arena rating from 16,008 anonymous pairwise votes.GPT-5.5: Style-controlled Arena rating from 56,647 anonymous pairwise votes. | ArenaType: Official benchmark leaderboardLeaderboard updated: 2026-08-12Import ID: lmarena-eeedf9209373a7f9b324bfb839e7b02fedacd1e5-1611ed64f3f1Retrieved 2026-08-16 |
| BrowseCompOverall | 87.5 %Winner Editorial selection from the vendor table, not a complete extract of the comparison cohort. | 84.4 % Editorial selection from the vendor table, not a complete extract of the comparison cohort. | 1,266 tasksaccuracyHigher is betterCohort: browsecomp-openai-gpt-5-6-tableNo documented setup differenceWinner: GPT-5.6 TerraGPT-5.6 Terra: No further settings disclosed GPT-5.5: No further settings disclosedCross-vendor comparison table with browsing tools. Exact agent systems differ. | OpenAIType: Vendor-reportedLeaderboard updated: 2026-07-09Import ID: curated-openai-2026-08-02-0226f7ed7e4f / curated-openai-2026-08-02-2e09b38d9cdeRetrieved 2026-08-02 |
| Code MigrationOverall | 36.445 % | 45.161 %Winner | 1accuracyHigher is betterCohort: vals-code-migration:1:overallNo documented setup differenceWinner: GPT-5.5GPT-5.6 Terra: No further settings disclosed GPT-5.5: No further settings disclosed | Vals AIType: Independent evaluationLeaderboard updated: 2026-08-13Import ID: vals-code-migration-2026-08-16-107652dc6bfcRetrieved 2026-08-16 |
| CorpFin v2Overall | 65.307 % | 68.415 %Winner | 2accuracyHigher is betterCohort: vals-corp-fin-v2:2:overallNo documented setup differenceWinner: GPT-5.5GPT-5.6 Terra: No further settings disclosed GPT-5.5: No further settings disclosed | Vals AIType: Independent evaluationLeaderboard updated: 2026-08-12Import ID: vals-corp_fin_v2-2026-08-16-45bbf84f57abRetrieved 2026-08-16 |
| EMBOverall | 67.614 %Winner | 64.543 % | 1accuracyHigher is betterCohort: vals-emb:1:overallNo documented setup differenceWinner: GPT-5.6 TerraGPT-5.6 Terra: No further settings disclosed GPT-5.5: No further settings disclosed | Vals AIType: Independent evaluationLeaderboard updated: 2026-08-13Import ID: vals-emb-2026-08-16-68d5d1d47a97Retrieved 2026-08-16 |
| Finance Agent (v2)Overall | 52.42 %Winner | 51.76 % | 2accuracyHigher is betterCohort: vals-finance-agent-v2:2:overallNo documented setup differenceWinner: GPT-5.6 TerraGPT-5.6 Terra: No further settings disclosed GPT-5.5: No further settings disclosed | Vals AIType: Independent evaluationLeaderboard updated: 2026-08-14Import ID: vals-fabv2-2026-08-16-8853da43085dRetrieved 2026-08-16 |
| GPQA DiamondOverall | 90.909 % | 93.182 %Winner | 1accuracyHigher is betterCohort: vals-gpqa:1:overallNo documented setup differenceWinner: GPT-5.5GPT-5.6 Terra: No further settings disclosed GPT-5.5: No further settings disclosed | Vals AIType: Independent evaluationLeaderboard updated: 2026-08-12Import ID: vals-gpqa-2026-08-16-7f8363eaa2dbRetrieved 2026-08-16 |
| Harvey's Legal Agent BenchmarkOverall · Task fully resolved | 0.417 % | 3.75 %Winner | 1task resolution rateHigher is betterCohort: vals-legal-agent-benchmark:1:overallNo documented setup differenceWinner: GPT-5.5GPT-5.6 Terra: No further settings disclosed GPT-5.5: No further settings disclosed | Vals AIType: Independent evaluationLeaderboard updated: 2026-08-14Import ID: vals-hlab-2026-08-16-bae90566df2fRetrieved 2026-08-16 |
| Legal Research BenchOverall · All-pass | 40.865 %Winner | 40.385 % | 1all-pass rateHigher is betterCohort: vals-legal-research:1:overallNo documented setup differenceWinner: GPT-5.6 TerraGPT-5.6 Terra: No further settings disclosed GPT-5.5: No further settings disclosed | Vals AIType: Independent evaluationLeaderboard updated: 2026-08-14Import ID: vals-legal_research-2026-08-16-af296c00ecaaRetrieved 2026-08-16 |
| LegalBenchOverall | 85.105 % | 86.515 %Winner | 1accuracyHigher is betterCohort: vals-legal-bench:1:overallNo documented setup differenceWinner: GPT-5.5GPT-5.6 Terra: No further settings disclosed GPT-5.5: No further settings disclosed | Vals AIType: Independent evaluationLeaderboard updated: 2026-08-12Import ID: vals-legal_bench-2026-08-16-d5b3b1b2b5c8Retrieved 2026-08-16 |
| LiveBenchOverall | 79.8 points | 79.9 pointsWinner | 2026-06-25composite scoreHigher is betterCohort: livebench-2026-06-25-maxNo documented setup differenceWinner: GPT-5.5GPT-5.6 Terra: No further settings disclosed GPT-5.5: No further settings disclosed23 objectively scored tasks across seven categories. | LiveBenchType: Official benchmark leaderboardLeaderboard updated: 2026-06-25Import ID: curated-livebench-2026-08-02-a50eafa7bbc5 / curated-livebench-2026-08-02-08e06c2bec3eRetrieved 2026-08-02 |
| LiveCodeBench v6Overall | 85.93 %Winner | 85.296 % | 1accuracyHigher is betterCohort: vals-lcb:1:overallNo documented setup differenceWinner: GPT-5.6 TerraGPT-5.6 Terra: No further settings disclosed GPT-5.5: No further settings disclosed | Vals AIType: Independent evaluationLeaderboard updated: 2026-08-13Import ID: vals-lcb-2026-08-16-17b9c147080dRetrieved 2026-08-16 |
| MedCodeOverall | 43.414 % | 49.1 %Winner | 1accuracyHigher is betterCohort: vals-medcode:1:overallNo documented setup differenceWinner: GPT-5.5GPT-5.6 Terra: No further settings disclosed GPT-5.5: No further settings disclosed | Vals AIType: Independent evaluationLeaderboard updated: 2026-08-12Import ID: vals-medcode-2026-08-16-524f7f474eacRetrieved 2026-08-16 |
| MedScribeOverall | 82.869 % | 86.868 %Winner | 1accuracyHigher is betterCohort: vals-medscribe:1:overallNo documented setup differenceWinner: GPT-5.5GPT-5.6 Terra: No further settings disclosed GPT-5.5: No further settings disclosed | Vals AIType: Independent evaluationLeaderboard updated: 2026-08-12Import ID: vals-medscribe-2026-08-16-c385354a7e62Retrieved 2026-08-16 |
| MMLU-ProOverall | 86.659 % | 88.144 %Winner | 1accuracyHigher is betterCohort: vals-mmlu-pro:1:overallNo documented setup differenceWinner: GPT-5.5GPT-5.6 Terra: No further settings disclosed GPT-5.5: No further settings disclosed | Vals AIType: Independent evaluationLeaderboard updated: 2026-08-12Import ID: vals-mmlu_pro-2026-08-16-e14d5bb3a34cRetrieved 2026-08-16 |
| MMMU-ProOverall | 86.474 % | 88.266 %Winner | 1accuracyHigher is betterCohort: vals-mmmu:1:overallNo documented setup differenceWinner: GPT-5.5GPT-5.6 Terra: No further settings disclosed GPT-5.5: No further settings disclosed | Vals AIType: Independent evaluationLeaderboard updated: 2026-08-09Import ID: vals-mmmu-2026-08-16-37c9a8c7e21fRetrieved 2026-08-16 |
| MortgageTaxOverall | 67.329 % | 68.76 %Winner | 1accuracyHigher is betterCohort: vals-mortgage-tax:1:overallNo documented setup differenceWinner: GPT-5.5GPT-5.6 Terra: No further settings disclosed GPT-5.5: No further settings disclosed | Vals AIType: Independent evaluationLeaderboard updated: 2026-08-12Import ID: vals-mortgage_tax-2026-08-16-e78c985dbb1cRetrieved 2026-08-16 |
| ProgramBenchOverall | 0.5 %Tie | 0.5 %Tie | 1accuracyHigher is betterCohort: vals-programbench:1:overallNo documented setup differenceTieGPT-5.6 Terra: No further settings disclosed GPT-5.5: No further settings disclosed | Vals AIType: Independent evaluationLeaderboard updated: 2026-08-13Import ID: vals-programbench-2026-08-16-08d9727662ddRetrieved 2026-08-16 |
| Public Benefits Bench v1.1Overall | 62.382 %Winner | 60.893 % | 1.1accuracyHigher is betterCohort: vals-snap:1.1:overallNo documented setup differenceWinner: GPT-5.6 TerraGPT-5.6 Terra: No further settings disclosed GPT-5.5: No further settings disclosed | Vals AIType: Independent evaluationLeaderboard updated: 2026-08-12Import ID: vals-public-benefits-bench-2026-08-16-7ce68123c502Retrieved 2026-08-16 |
| SAGEOverall | 47.003 % | 51.532 %Winner | 1accuracyHigher is betterCohort: vals-sage:1:overallNo documented setup differenceWinner: GPT-5.5GPT-5.6 Terra: No further settings disclosed GPT-5.5: No further settings disclosed | Vals AIType: Independent evaluationLeaderboard updated: 2026-08-12Import ID: vals-sage-2026-08-16-a416dd25affbRetrieved 2026-08-16 |
| SkillsBenchOverall | 60.645 % | 62.209 %Winner | 1accuracyHigher is betterCohort: vals-skillsbench:1:overallNo documented setup differenceWinner: GPT-5.5GPT-5.6 Terra: Harness: OpenHands GPT-5.5: Harness: OpenHands | Vals AIType: Independent evaluationLeaderboard updated: 2026-08-13Import ID: vals-skillsbench-2026-08-16-4917a67268d2Retrieved 2026-08-16 |
| SWE-bench VerifiedOverall | 75.2 % | 82.6 %Winner | 1accuracyHigher is betterCohort: vals-swebench:1:overallNo documented setup differenceWinner: GPT-5.5GPT-5.6 Terra: No further settings disclosed GPT-5.5: No further settings disclosed | Vals AIType: Independent evaluationLeaderboard updated: 2026-08-12Import ID: vals-swebench-2026-08-16-c133071b8167Retrieved 2026-08-16 |
| TaxEval v2Overall | 76.166 %Winner | 74.98 % | 2accuracyHigher is betterCohort: vals-tax-eval-v2:2:overallNo documented setup differenceWinner: GPT-5.6 TerraGPT-5.6 Terra: No further settings disclosed GPT-5.5: No further settings disclosed | Vals AIType: Independent evaluationLeaderboard updated: 2026-08-12Import ID: vals-tax_eval_v2-2026-08-16-5bbd495dac53Retrieved 2026-08-16 |
| Terminal-Bench 2.1Overall | 73.408 % | 76.404 %Winner | 2.1accuracyHigher is betterCohort: vals-terminal-bench-2-1:2.1:overallNo documented setup differenceWinner: GPT-5.5GPT-5.6 Terra: No further settings disclosed GPT-5.5: No further settings disclosed | Vals AIType: Independent evaluationLeaderboard updated: 2026-08-13Import ID: vals-terminal-bench-2-1-2026-08-16-b3f38c18bea4Retrieved 2026-08-16 |
| Vals IndexOverall | 56.535 % | 57.411 %Winner | 2weighted index scoreHigher is betterCohort: vals-vals-index:2:overallNo documented setup differenceWinner: GPT-5.5GPT-5.6 Terra: No further settings disclosed GPT-5.5: No further settings disclosed | Vals AIType: Independent evaluationLeaderboard updated: 2026-08-14Import ID: vals-vals_index-2026-08-16-ab641d89d6edRetrieved 2026-08-16 |
| Vals Multimodal IndexOverall | 65.07 % | 68.071 %Winner | 1.2weighted index scoreHigher is betterCohort: vals-vals-multimodal-index:1.2:overallNo documented setup differenceWinner: GPT-5.5GPT-5.6 Terra: No further settings disclosed GPT-5.5: No further settings disclosed | Vals AIType: Independent evaluationLeaderboard updated: 2026-08-11Import ID: vals-vals_multimodal_index-2026-08-16-9f3ebb221408Retrieved 2026-08-16 |
| Vibe Code Bench v1.1Overall | 67.842 % | 69.847 %Winner | 1.1accuracyHigher is betterCohort: vals-vibe-code-bench:1.1:overallNo documented setup differenceWinner: GPT-5.5GPT-5.6 Terra: Harness: OpenHands GPT-5.5: Harness: OpenHands | Vals AIType: Independent evaluationLeaderboard updated: 2026-08-13Import ID: vals-vibe-code-2026-08-16-a73c9770bcc4Retrieved 2026-08-16 |
| Arena Text, Style ControlOverall | 1,464.935 arena points 95% confidence interval: ±5.686The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | 1,481.794 arena pointsHigher measured value 95% confidence interval: ±4.053The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | style-control-v1style-controlled Bradley-Terry ratingHigher is betterCohort: lmarena-text-style-control:2026-08-12:overallTest setup not documented as identicalNo direct winnerGPT-5.6 Terra: Snapshot: gpt-5.6-terra-xhigh, Reasoning: xhigh, Harness: Arena text, style control GPT-5.5: Snapshot: gpt-5.5-high, Reasoning: high, Harness: Arena text, style controlGPT-5.6 Terra: Style-controlled Arena rating from 16,008 anonymous pairwise votes.GPT-5.5: Style-controlled Arena rating from 55,322 anonymous pairwise votes. | ArenaType: Official benchmark leaderboardLeaderboard updated: 2026-08-12Import ID: lmarena-eeedf9209373a7f9b324bfb839e7b02fedacd1e5-1611ed64f3f1Retrieved 2026-08-16 |
| Code MigrationCLIReasoning: xhigh | 26.645 % | 36.882 %Winner | 1accuracyHigher is betterCohort: vals-code-migration:1:cliNo documented setup differenceWinner: GPT-5.5GPT-5.6 Terra: Reasoning: xhigh, Output limit: 128,000 tokens GPT-5.5: Reasoning: xhigh, Output limit: 128,000 tokens | Vals AIType: Independent evaluationLeaderboard updated: 2026-08-09Import ID: vals-code-migration-2026-08-11-3a2d5ce718a3Retrieved 2026-08-11 |
| CorpFin v2Exact PagesReasoning: xhigh | 63.17 % | 65.618 %Winner | 2accuracyHigher is betterCohort: vals-corp-fin-v2:2:exact_pagesNo documented setup differenceWinner: GPT-5.5GPT-5.6 Terra: Reasoning: xhigh, Output limit: 128,000 tokens GPT-5.5: Reasoning: xhigh, Output limit: 128,000 tokens | Vals AIType: Independent evaluationLeaderboard updated: 2026-08-06Import ID: vals-corp_fin_v2-2026-08-11-d9e58d191cd9Retrieved 2026-08-11 |
| EMBCompsReasoning: xhigh | 72.539 %Winner | 64.681 % | 1accuracyHigher is betterCohort: vals-emb:1:compsNo documented setup differenceWinner: GPT-5.6 TerraGPT-5.6 Terra: Reasoning: xhigh, Output limit: 128,000 tokens GPT-5.5: Reasoning: xhigh, Output limit: 128,000 tokens | Vals AIType: Independent evaluationLeaderboard updated: 2026-08-06Import ID: vals-emb-2026-08-11-e3c855e236e4Retrieved 2026-08-11 |
| Finance Agent (v2)AdjustmentsReasoning: xhigh | 50.442 %Winner | 45.74 % | 2accuracyHigher is betterCohort: vals-finance-agent-v2:2:adjustmentsNo documented setup differenceWinner: GPT-5.6 TerraGPT-5.6 Terra: Reasoning: xhigh, Output limit: 128,000 tokens GPT-5.5: Reasoning: xhigh, Output limit: 128,000 tokens | Vals AIType: Independent evaluationLeaderboard updated: 2026-08-06Import ID: vals-fabv2-2026-08-11-3e5c93a1857cRetrieved 2026-08-11 |
| GPQA DiamondFew-Shot CoTReasoning: xhigh | 89.899 % | 93.434 %Winner | 1accuracyHigher is betterCohort: vals-gpqa:1:diamond_few_shot_cotNo documented setup differenceWinner: GPT-5.5GPT-5.6 Terra: Reasoning: xhigh, Output limit: 128,000 tokens GPT-5.5: Reasoning: xhigh, Output limit: 128,000 tokens | Vals AIType: Independent evaluationLeaderboard updated: 2026-08-09Import ID: vals-gpqa-2026-08-11-d3325290a404Retrieved 2026-08-11 |
| Harvey's Legal Agent BenchmarkAntitrust Competition · Criteria passedReasoning: xhigh | 76.449 % | 82.246 %Winner | 1criteria pass rateHigher is betterCohort: vals-legal-agent-benchmark:1:criteria_pass_rate__antitrust_competitionNo documented setup differenceWinner: GPT-5.5GPT-5.6 Terra: Reasoning: xhigh, Output limit: 128,000 tokens GPT-5.5: Reasoning: xhigh, Output limit: 128,000 tokens | Vals AIType: Independent evaluationLeaderboard updated: 2026-08-07Import ID: vals-hlab-2026-08-11-ea11b6e53414Retrieved 2026-08-11 |
| Legal Research BenchAdministrative / Regulatory · All-passReasoning: xhigh | 57.576 %Winner | 53.03 % | 1all-pass rateHigher is betterCohort: vals-legal-research:1:administrative_regulatoryNo documented setup differenceWinner: GPT-5.6 TerraGPT-5.6 Terra: Reasoning: xhigh, Output limit: 128,000 tokens GPT-5.5: Reasoning: xhigh, Output limit: 128,000 tokens | Vals AIType: Independent evaluationLeaderboard updated: 2026-08-06Import ID: vals-legal_research-2026-08-11-326cf7aaca58Retrieved 2026-08-11 |
| LegalBenchConclusion TasksReasoning: xhigh | 90.327 %Winner | 89.644 % | 1accuracyHigher is betterCohort: vals-legal-bench:1:conclusion_tasksNo documented setup differenceWinner: GPT-5.6 TerraGPT-5.6 Terra: Reasoning: xhigh, Output limit: 128,000 tokens GPT-5.5: Reasoning: xhigh, Output limit: 128,000 tokens | Vals AIType: Independent evaluationLeaderboard updated: 2026-08-09Import ID: vals-legal_bench-2026-08-11-836e5e44618eRetrieved 2026-08-11 |
| LiveBenchAgentic coding | 68 pointsWinner | 52.1 points | 2026-06-25category scoreHigher is betterCohort: livebench-2026-06-25-agentic-coding-maxNo documented setup differenceWinner: GPT-5.6 TerraGPT-5.6 Terra: No further settings disclosed GPT-5.5: No further settings disclosedAgentic coding category inside the same LiveBench release. | LiveBenchType: Official benchmark leaderboardLeaderboard updated: 2026-06-25Import ID: curated-livebench-2026-08-02-ef86df16502a / curated-livebench-2026-08-02-a5dc6dae7795Retrieved 2026-08-02 |
| LiveCodeBench v6EasyReasoning: xhigh | 97.205 % | 98.447 %Winner | 1accuracyHigher is betterCohort: vals-lcb:1:easyNo documented setup differenceWinner: GPT-5.5GPT-5.6 Terra: Reasoning: xhigh, Output limit: 128,000 tokens GPT-5.5: Reasoning: xhigh, Output limit: 128,000 tokens | Vals AIType: Independent evaluationLeaderboard updated: 2026-08-09Import ID: vals-lcb-2026-08-11-0342bcc364e4Retrieved 2026-08-11 |
| MMLU-ProBiologyReasoning: xhigh | 93.026 % | 94.003 %Winner | 1accuracyHigher is betterCohort: vals-mmlu-pro:1:biologyNo documented setup differenceWinner: GPT-5.5GPT-5.6 Terra: Reasoning: xhigh, Output limit: 128,000 tokens GPT-5.5: Reasoning: xhigh, Output limit: 128,000 tokens | Vals AIType: Independent evaluationLeaderboard updated: 2026-08-09Import ID: vals-mmlu_pro-2026-08-11-b8e53828d746Retrieved 2026-08-11 |
| MortgageTaxNumerical ExtractionReasoning: xhigh | 74.324 % | 76.153 %Winner | 1accuracyHigher is betterCohort: vals-mortgage-tax:1:numerical_extractionNo documented setup differenceWinner: GPT-5.5GPT-5.6 Terra: Reasoning: xhigh, Output limit: 128,000 tokens GPT-5.5: Reasoning: xhigh, Output limit: 128,000 tokens | Vals AIType: Independent evaluationLeaderboard updated: 2026-08-09Import ID: vals-mortgage_tax-2026-08-11-5ea6eef3e482Retrieved 2026-08-11 |
| ProgramBenchAlmost ResolvedReasoning: xhigh | 6.5 % | 9.5 %Winner | 1accuracyHigher is betterCohort: vals-programbench:1:almostNo documented setup differenceWinner: GPT-5.5GPT-5.6 Terra: Reasoning: xhigh, Output limit: 128,000 tokens GPT-5.5: Reasoning: xhigh, Output limit: 128,000 tokens | Vals AIType: Independent evaluationLeaderboard updated: 2026-08-09Import ID: vals-programbench-2026-08-11-b6f8959fbdfeRetrieved 2026-08-11 |
| SAGEAutomataReasoning: xhigh | 38.889 % | 40.476 %Higher measured value | 1accuracyHigher is betterCohort: vals-sage:1:automataTest setup not documented as identicalNo direct winnerGPT-5.6 Terra: Reasoning: xhigh, Output limit: 30,000 tokens GPT-5.5: Reasoning: xhigh, Temperature: 1, Output limit: 30,000 tokens | Vals AIType: Independent evaluationLeaderboard updated: 2026-08-09Import ID: vals-sage-2026-08-11-f1f79f6d8af3Retrieved 2026-08-11 |
| SkillsBenchNo SkillsReasoning: xhigh | 44.208 % | 49.875 %Winner | 1accuracyHigher is betterCohort: vals-skillsbench:1:no_skillsNo documented setup differenceWinner: GPT-5.5GPT-5.6 Terra: Reasoning: xhigh, Harness: OpenHands, Output limit: 128,000 tokens GPT-5.5: Reasoning: xhigh, Harness: OpenHands, Output limit: 128,000 tokens | Vals AIType: Independent evaluationLeaderboard updated: 2026-08-07Import ID: vals-skillsbench-2026-08-11-351bec9d0e01Retrieved 2026-08-11 |
| SWE-bench Verified<15 min fixReasoning: xhigh | 77.835 % | 91.753 %Winner | 1accuracyHigher is betterCohort: vals-swebench:1:<15 min fixNo documented setup differenceWinner: GPT-5.5GPT-5.6 Terra: Reasoning: xhigh, Output limit: 128,000 tokens GPT-5.5: Reasoning: xhigh, Output limit: 128,000 tokens | Vals AIType: Independent evaluationLeaderboard updated: 2026-08-08Import ID: vals-swebench-2026-08-11-a6212cd857d8Retrieved 2026-08-11 |
| TaxEval v2CorrectnessReasoning: xhigh | 65.822 %Winner | 65.495 % | 2accuracyHigher is betterCohort: vals-tax-eval-v2:2:correctnessNo documented setup differenceWinner: GPT-5.6 TerraGPT-5.6 Terra: Reasoning: xhigh, Output limit: 128,000 tokens GPT-5.5: Reasoning: xhigh, Output limit: 128,000 tokens | Vals AIType: Independent evaluationLeaderboard updated: 2026-08-09Import ID: vals-tax_eval_v2-2026-08-11-d05a40bf446fRetrieved 2026-08-11 |
| Terminal-Bench 2.1Easy | 83.333 %No direct winner | 83.333 %No direct winner | 2.1accuracyHigher is betterCohort: vals-terminal-bench-2-1:2.1:easyTest setup not documented as identicalNo direct winnerGPT-5.6 Terra: Reasoning: xhigh, Output limit: 128,000 tokens GPT-5.5: Reasoning: high, Output limit: 128,000 tokens | Vals AIType: Independent evaluationLeaderboard updated: 2026-08-06Import ID: vals-terminal-bench-2-1-2026-08-11-8f0ebd72a609Retrieved 2026-08-11 |
| Vals IndexCorpFin v2Reasoning: xhigh | 66.434 % | 69.58 %Winner | 1.2benchmark scoreHigher is betterCohort: vals-vals-index:1.2:corp_fin_v2No documented setup differenceWinner: GPT-5.5GPT-5.6 Terra: Reasoning: xhigh, Output limit: 128,000 tokens GPT-5.5: Reasoning: xhigh, Output limit: 128,000 tokens | Vals AIType: Independent evaluationLeaderboard updated: 2026-08-09Import ID: vals-vals_index-2026-08-11-e79d08d59249Retrieved 2026-08-11 |
| Vals Multimodal IndexCorpFin v2Reasoning: xhigh | 66.434 % | 69.58 %Winner | 1.2benchmark scoreHigher is betterCohort: vals-vals-multimodal-index:1.2:corp_fin_v2No documented setup differenceWinner: GPT-5.5GPT-5.6 Terra: Reasoning: xhigh, Output limit: 128,000 tokens GPT-5.5: Reasoning: xhigh, Output limit: 128,000 tokens | Vals AIType: Independent evaluationLeaderboard updated: 2026-08-09Import ID: vals-vals_multimodal_index-2026-08-11-fa704862df19Retrieved 2026-08-11 |
| Arena Text, Style ControlBusiness, management and finance | 1,468.921 arena points 95% confidence interval: ±11.251The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | 1,486.534 arena pointsHigher measured value 95% confidence interval: ±6.991The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | style-control-v1style-controlled Bradley-Terry ratingHigher is betterCohort: lmarena-text-style-control:2026-08-12:industry_business_and_management_and_financial_operationsTest setup not documented as identicalNo direct winnerGPT-5.6 Terra: Snapshot: gpt-5.6-terra-xhigh, Reasoning: xhigh, Harness: Arena text, style control GPT-5.5: Snapshot: gpt-5.5, Harness: Arena text, style controlGPT-5.6 Terra: Style-controlled Arena rating from 3,050 anonymous pairwise votes.GPT-5.5: Style-controlled Arena rating from 11,314 anonymous pairwise votes. | ArenaType: Official benchmark leaderboardLeaderboard updated: 2026-08-12Import ID: lmarena-eeedf9209373a7f9b324bfb839e7b02fedacd1e5-1611ed64f3f1Retrieved 2026-08-16 |
| Code MigrationCOBOLReasoning: xhigh | 65.844 % | 70 %Winner | 1accuracyHigher is betterCohort: vals-code-migration:1:cobolNo documented setup differenceWinner: GPT-5.5GPT-5.6 Terra: Reasoning: xhigh, Output limit: 128,000 tokens GPT-5.5: Reasoning: xhigh, Output limit: 128,000 tokens | Vals AIType: Independent evaluationLeaderboard updated: 2026-08-09Import ID: vals-code-migration-2026-08-11-3a2d5ce718a3Retrieved 2026-08-11 |
| CorpFin v2Max Fitting ContextReasoning: xhigh | 66.317 % | 70.047 %Winner | 2accuracyHigher is betterCohort: vals-corp-fin-v2:2:max_fitting_contextNo documented setup differenceWinner: GPT-5.5GPT-5.6 Terra: Reasoning: xhigh, Output limit: 128,000 tokens GPT-5.5: Reasoning: xhigh, Output limit: 128,000 tokens | Vals AIType: Independent evaluationLeaderboard updated: 2026-08-06Import ID: vals-corp_fin_v2-2026-08-11-d9e58d191cd9Retrieved 2026-08-11 |
| EMBDataroomReasoning: xhigh | 81.591 %Winner | 81.227 % | 1accuracyHigher is betterCohort: vals-emb:1:dataroomNo documented setup differenceWinner: GPT-5.6 TerraGPT-5.6 Terra: Reasoning: xhigh, Output limit: 128,000 tokens GPT-5.5: Reasoning: xhigh, Output limit: 128,000 tokens | Vals AIType: Independent evaluationLeaderboard updated: 2026-08-06Import ID: vals-emb-2026-08-11-e3c855e236e4Retrieved 2026-08-11 |
| Finance Agent (v2)All-PassReasoning: xhigh | 40.448 %Winner | 39.562 % | 2accuracyHigher is betterCohort: vals-finance-agent-v2:2:all_passNo documented setup differenceWinner: GPT-5.6 TerraGPT-5.6 Terra: Reasoning: xhigh, Output limit: 128,000 tokens GPT-5.5: Reasoning: xhigh, Output limit: 128,000 tokens | Vals AIType: Independent evaluationLeaderboard updated: 2026-08-06Import ID: vals-fabv2-2026-08-11-3e5c93a1857cRetrieved 2026-08-11 |
| GPQA DiamondZero-Shot CoTReasoning: xhigh | 91.919 % | 92.929 %Winner | 1accuracyHigher is betterCohort: vals-gpqa:1:diamond_zero_shot_cotNo documented setup differenceWinner: GPT-5.5GPT-5.6 Terra: Reasoning: xhigh, Output limit: 128,000 tokens GPT-5.5: Reasoning: xhigh, Output limit: 128,000 tokens | Vals AIType: Independent evaluationLeaderboard updated: 2026-08-09Import ID: vals-gpqa-2026-08-11-d3325290a404Retrieved 2026-08-11 |
| Harvey's Legal Agent BenchmarkAntitrust Competition · Task fully resolvedReasoning: xhigh | 0 %Tie | 0 %Tie | 1task resolution rateHigher is betterCohort: vals-legal-agent-benchmark:1:antitrust_competitionNo documented setup differenceTieGPT-5.6 Terra: Reasoning: xhigh, Output limit: 128,000 tokens GPT-5.5: Reasoning: xhigh, Output limit: 128,000 tokens | Vals AIType: Independent evaluationLeaderboard updated: 2026-08-07Import ID: vals-hlab-2026-08-11-ea11b6e53414Retrieved 2026-08-11 |
| Legal Research BenchAdministrative / Regulatory · Weighted partial creditReasoning: xhigh | 86.696 %Winner | 86.669 % | 1weighted partial-credit scoreHigher is betterCohort: vals-legal-research:1:weighted_pass__administrative_regulatoryNo documented setup differenceWinner: GPT-5.6 TerraGPT-5.6 Terra: Reasoning: xhigh, Output limit: 128,000 tokens GPT-5.5: Reasoning: xhigh, Output limit: 128,000 tokens | Vals AIType: Independent evaluationLeaderboard updated: 2026-08-06Import ID: vals-legal_research-2026-08-11-326cf7aaca58Retrieved 2026-08-11 |
| LegalBenchInterpretation TasksReasoning: xhigh | 83.178 % | 83.836 %Winner | 1accuracyHigher is betterCohort: vals-legal-bench:1:interpretation_tasksNo documented setup differenceWinner: GPT-5.5GPT-5.6 Terra: Reasoning: xhigh, Output limit: 128,000 tokens GPT-5.5: Reasoning: xhigh, Output limit: 128,000 tokens | Vals AIType: Independent evaluationLeaderboard updated: 2026-08-09Import ID: vals-legal_bench-2026-08-11-836e5e44618eRetrieved 2026-08-11 |
| LiveBenchCoding | 78.2 points | 82.1 pointsWinner | 2026-06-25category scoreHigher is betterCohort: livebench-2026-06-25-coding-maxNo documented setup differenceWinner: GPT-5.5GPT-5.6 Terra: No further settings disclosed GPT-5.5: No further settings disclosedCoding category inside the same LiveBench release. | LiveBenchType: Official benchmark leaderboardLeaderboard updated: 2026-06-25Import ID: curated-livebench-2026-08-02-affb8fbcb10a / curated-livebench-2026-08-02-3f8bcd468562Retrieved 2026-08-02 |
| LiveCodeBench v6HardReasoning: xhigh | 72.857 %Winner | 69.714 % | 1accuracyHigher is betterCohort: vals-lcb:1:hardNo documented setup differenceWinner: GPT-5.6 TerraGPT-5.6 Terra: Reasoning: xhigh, Output limit: 128,000 tokens GPT-5.5: Reasoning: xhigh, Output limit: 128,000 tokens | Vals AIType: Independent evaluationLeaderboard updated: 2026-08-09Import ID: vals-lcb-2026-08-11-0342bcc364e4Retrieved 2026-08-11 |
| MMLU-ProBusinessReasoning: xhigh | 90.875 % | 92.015 %Winner | 1accuracyHigher is betterCohort: vals-mmlu-pro:1:businessNo documented setup differenceWinner: GPT-5.5GPT-5.6 Terra: Reasoning: xhigh, Output limit: 128,000 tokens GPT-5.5: Reasoning: xhigh, Output limit: 128,000 tokens | Vals AIType: Independent evaluationLeaderboard updated: 2026-08-09Import ID: vals-mmlu_pro-2026-08-11-b8e53828d746Retrieved 2026-08-11 |
| MortgageTaxSemantic ExtractionReasoning: xhigh | 60.334 % | 61.367 %Winner | 1accuracyHigher is betterCohort: vals-mortgage-tax:1:semantic_extractionNo documented setup differenceWinner: GPT-5.5GPT-5.6 Terra: Reasoning: xhigh, Output limit: 128,000 tokens GPT-5.5: Reasoning: xhigh, Output limit: 128,000 tokens | Vals AIType: Independent evaluationLeaderboard updated: 2026-08-09Import ID: vals-mortgage_tax-2026-08-11-5ea6eef3e482Retrieved 2026-08-11 |
| ProgramBenchFully ResolvedReasoning: xhigh | 0.5 %Tie | 0.5 %Tie | 1accuracyHigher is betterCohort: vals-programbench:1:strictNo documented setup differenceTieGPT-5.6 Terra: Reasoning: xhigh, Output limit: 128,000 tokens GPT-5.5: Reasoning: xhigh, Output limit: 128,000 tokens | Vals AIType: Independent evaluationLeaderboard updated: 2026-08-09Import ID: vals-programbench-2026-08-11-b6f8959fbdfeRetrieved 2026-08-11 |
| SAGECalculusReasoning: xhigh | 59.259 % | 72.222 %Higher measured value | 1accuracyHigher is betterCohort: vals-sage:1:calculusTest setup not documented as identicalNo direct winnerGPT-5.6 Terra: Reasoning: xhigh, Output limit: 30,000 tokens GPT-5.5: Reasoning: xhigh, Temperature: 1 | Vals AIType: Independent evaluationLeaderboard updated: 2026-08-09Import ID: vals-sage-2026-08-11-f1f79f6d8af3Retrieved 2026-08-11 |
| SkillsBenchWith SkillsReasoning: xhigh | 60.645 % | 62.209 %Winner | 1accuracyHigher is betterCohort: vals-skillsbench:1:with_skillsNo documented setup differenceWinner: GPT-5.5GPT-5.6 Terra: Reasoning: xhigh, Harness: OpenHands, Output limit: 128,000 tokens GPT-5.5: Reasoning: xhigh, Harness: OpenHands, Output limit: 128,000 tokens | Vals AIType: Independent evaluationLeaderboard updated: 2026-08-07Import ID: vals-skillsbench-2026-08-11-351bec9d0e01Retrieved 2026-08-11 |
The table shows 64 diversified result series from 238 shared results. This prevents one benchmark with many subtasks from crowding out every other test.
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.
Prices use official API rates per 1M tokens. Web subscriptions and cloud platform surcharges can differ.
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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