Benchmark Almanac

GPT-5.5

GPT-5.5 ranks first on 37 of the 378 benchmarks with five or more models scored.

OpenAI Released April 23rd, 2026 Family GPT-5 The lab's model card Compare with others
402
Benchmarks with a score
37
Ranked first, out of five or more models
99
In the top three
OpenAI Apr 2026

GPT-5.5

Closed weights Flagship

160.1 #20 of 256
Epoch Capabilities Index
Self-Reported Index 160.8 #25 of 404
  • SWE-bench Verified 80.6% #2 /32
  • MMMU-Pro 83.2% #4 /90
  • Terminal-Bench 2.0 84.7% #1 /43

Where it ranks

Its best score on each benchmark, and where that ranks among every model with a score there. We rank each model once, at its best setting.

Knowledge and language

BenchmarkScoreRankSource
Wer wird Millionär? LLM Benchmark 588889.0 #2 of 77 Official leaderboard
Judgemark v4 87.8 #2 of 40 Official leaderboard
CL-bench Life 22.2% #1 of 16 Official leaderboard
OpenAI MRCR v2 75.3% #3 of 47 Official leaderboard
FACTS Search 85% #2 of 31 Official leaderboard
LMArena (Elo) 1,481 #26 of 335 Official leaderboard
Extended NYT Connections 96.2% #8 of 103 Official leaderboard
SEA-HELM 76.3 #6 of 71 Official leaderboard
CulturalRiddles 76.3% #2 of 20 Official leaderboard
EQ-Bench 3 1,554 #8 of 78 Official leaderboard
EvoArena SWE-Chain-Evo 50.9% #1 of 8 Official leaderboard
EvoArena Terminal-Bench-Evo 65.1% #1 of 8 Official leaderboard
FACTS Parametric 78% #6 of 45 Official leaderboard
Creative Writing v3 79.5 #17 of 120 Official leaderboard
SimpleQA Verified 63% #16 of 94 Epoch AI run
Longform Creative Writing (EQ-Bench) 78.2 #21 of 119 Official leaderboard
Lech Mazur Creative Writing 2.39 #9 of 50 Official leaderboard
EQ-Bench 4 1,295 #6 of 32 Official leaderboard
Document Arena 1,481 #8 of 39 Official leaderboard
Doubao Multi-Turn Bench 62.5% #1 of 4 Official leaderboard
OpenAI user-flagged hallucination eval 9.20% #1 of 4 Lab model card
xDailyBench 73% #1 of 4 Official leaderboard
DesignArena ASCII Art 1,247 #22 of 77 Official leaderboard
AA-LCR Extended 70.5% #14 of 49 Official leaderboard
Phare 70.5% #19 of 62 Official leaderboard
Opening Lines Arena 1,567 #5 of 15 Official leaderboard
HUMAINE 30 #17 of 50 Official leaderboard
Structured Output Benchmark 86% #7 of 19 Official leaderboard
BullshitBench V2 47% #57 of 129 Official leaderboard
Hemingway-bench 1,035 #19 of 42 Official leaderboard
Vectara Hallucination Leaderboard (2025 dataset) 9.30% #52 of 104 Official leaderboard
BullshitBench 27.3% #54 of 107 Official leaderboard
GraphWalks 73.7% #15 of 27 Lab model card
Antidote 1,013 #21 of 36 Official leaderboard
Joke Arena 1,499 #15 of 25 Official leaderboard
ELI5 Arena 1,450 #11 of 18 Official leaderboard
Corp Speak Arena 1,441 #18 of 22 Official leaderboard
CompassArena 989 #9 of 10 Official leaderboard
EvoArena PersonaMem-Evo 43.8% #8 of 8 Official leaderboard

Math and science

BenchmarkScoreRankSource
OTIS Mock AIME 2024-2025 100% #1 of 212 Epoch AI run
ForecastBench 0.11 #1 of 82 Official leaderboard
MathArena Apex Shortlist 98.4% #1 of 38 Official leaderboard
FrontierMath 51.7% #2 of 70 Epoch AI run
AIME 2026 100% #1 of 31 Official leaderboard
HMMT 2026 98.5% #1 of 31 Official leaderboard
MathArena (Apex, IMO, USAMO) 80.2% #2 of 47 Official leaderboard
GPQA Diamond 94% #14 of 229 Epoch AI run
SpatialBench (LatchBio) 57.6% #1 of 14 Official leaderboard
FrontierMath Tier 4 35.4% #4 of 55 Epoch AI run
ResearchClawBench 34.9 #2 of 23 Official leaderboard
DTBench 96% #16 of 180 Official leaderboard
USAMO 2026 98.2% #1 of 9 Official leaderboard
ARC-AGI-2 85% #13 of 98 Official leaderboard
IMO-ProofBench 71.9% #3 of 20 Official leaderboard
Surface Evolver Bench 88.1% #4 of 25 Official leaderboard
FrontierMath Tiers 1-3 v2 85.3% #16 of 86 Official leaderboard
ARC-AGI 95% #20 of 95 Official leaderboard
Verifying the Verifiers (Project APE CRED benchmark) 96.5% #5 of 23 Official leaderboard
ProofBench 50% #13 of 59 Official leaderboard
FrontierMath Tier 4 v2 72.5% #15 of 68 Official leaderboard
SimpleBench 69% #26 of 106 Official leaderboard
AstaBench 52.9% #4 of 13 Official leaderboard
ASI-Bench 38.1 #4 of 11 Official leaderboard
Leipzig Benchmark 44% #9 of 19 Official leaderboard
scBench (LatchBio SingleCellBench) 57.1% #13 of 26 Official leaderboard
FrontierMath Erdős 0% #8 of 15 Official leaderboard
BixBench3 43.1 #11 of 20 Official leaderboard
LatchBio Capabilities v1.0 41.9% #15 of 27 Official leaderboard
NatureBench 4.44% #17 of 18 Official leaderboard
Apodex Discovery 2.25 #8 of 8 Official leaderboard
BixBench 80.5% #4 of 4 Lab model card

Coding

BenchmarkScoreRankSource
WeirdML 84.9% #7 of 112 Official leaderboard
SWE-bench Verified 80.6% #2 of 32 Epoch AI run
Bird-SQL 72.5% #1 of 13 Official leaderboard
Monthly-SWEBench 76% #1 of 12 Official leaderboard
Claw-SWE-Bench 78% #2 of 16 Official leaderboard
FeatureBench 69.8% #2 of 16 Official leaderboard
FeatureBench Lite 69.8% #2 of 16 Official leaderboard
MLE-bench 30 36.7% #1 of 8 Lab model card
ALE-Bench 2,108 #17 of 126 Official leaderboard
LiveSQLBench 33.5% #5 of 36 Official leaderboard
Vision2Web S3-2026 74.6% #1 of 7 Official leaderboard
OpenHands Index 65.9% #5 of 33 Official leaderboard
EvoCode-Bench 52.4% #2 of 13 Official leaderboard
EvoCode-Bench v2 29.5% #2 of 13 Official leaderboard
FrontierCode 25.5% #2 of 12 Official leaderboard
LoopArena 36.3% #1 of 6 Official leaderboard
DAXBench v2 86.4% #10 of 47 Official leaderboard
FrontierCS 72.1 #3 of 14 Official leaderboard
DesignArena Game Dev 1,283 #31 of 143 Official leaderboard
PostTrainBench 28.4% #5 of 23 Official leaderboard
SlopCodeBench 28.1% #5 of 22 Official leaderboard
Code Migration 45.2% #18 of 78 Official leaderboard
AndroidBench 80.2% #8 of 32 Official leaderboard
EvoPolicyGym 0.89 #1 of 4 Official leaderboard
ParallelKernelBench 32.2% #1 of 4 Official leaderboard
DesignArena SVG 1,226 #27 of 103 Official leaderboard
GSO-Bench 40.2% #8 of 30 Official leaderboard
GBAEval 53.2% #6 of 21 Official leaderboard
DesignArena Data Visualization 1,260 #35 of 118 Official leaderboard
SWE-bench-Live 62% #4 of 12 Official leaderboard
Senior SWE-Bench 29.5% #8 of 23 Official leaderboard
SWE Atlas Refactoring 44.8% #6 of 17 Official leaderboard
ProgramBench 0.50% #9 of 25 Official leaderboard
DesignArena Code 1,250 #52 of 143 Official leaderboard
SWE Atlas 45.4% #8 of 22 Official leaderboard
DesignArena Website 1,249 #55 of 151 Official leaderboard
DesignArena UI Component 1,250 #51 of 139 Official leaderboard
FrontierCode 1.1 43% #3 of 8 Official leaderboard
WebDev Arena 1,510 #41 of 105 arena.ai, via Epoch AI
DeepSWE 67% #11 of 28 Official leaderboard
ProgramBench almost solved 13.5% #10 of 25 Official leaderboard
ProgramBench tests passed 69.5% #10 of 25 Official leaderboard
Monorepo-Bench 60% #2 of 5 Lab model card
SWE-Bench Pro 58.6% #33 of 81 Lab model card
SWE Atlas Test Writing 42.6% #9 of 22 Official leaderboard
FrontierSWE v1 64.5% #7 of 17 Official leaderboard
SWE Atlas Codebase QnA Extended 17.3% #16 of 38 Official leaderboard
Vibe Code Bench 69.8% #51 of 120 Official leaderboard
Code Arena 1,512 #57 of 128 Official leaderboard
TasteVal 47.0× #9 of 20 Official leaderboard
FrogsGame post-training task 1.40% #8 of 17 Official leaderboard
DesignArena Image to HTML 1,208 #25 of 51 Official leaderboard
DesignArena 3D Design 1,178 #68 of 136 Official leaderboard
Data Agent Benchmark 78.5% #9 of 18 Official leaderboard
SWE-Marathon 12% #6 of 12 Official leaderboard
HarnessDev 55.1% #3 of 6 Official leaderboard
APEX-SWE 40.8% #33 of 65 Official leaderboard
GameDevBench 54.7% #9 of 17 Official leaderboard
DesignArena Agentic Image to HTML 1,205 #6 of 11 Official leaderboard
DesignArena Agentic Game Dev 1,127 #15 of 27 Official leaderboard
FrontierCode 2.0 23.6% #18 of 32 Official leaderboard
Image-to-WebDev Arena 1,531 #32 of 55 Official leaderboard
GameCraft-Bench 39.5% #9 of 15 Official leaderboard
DesignArena Android (Kotlin) 1,153 #29 of 46 Official leaderboard
DesignArena Godot Game Dev 1,155 #16 of 24 Official leaderboard
MLS-Bench 35.5% #10 of 15 Official leaderboard
DesignArena Agentic Overall 1,106 #50 of 74 Official leaderboard
DesignArena React Native 1,136 #38 of 56 Official leaderboard
SWE-bench Verified Extended 39.3% #30 of 44 Official leaderboard
Doc2Harness 34.6% #13 of 19 Official leaderboard
DesignArena Full Stack 1,068 #35 of 49 Official leaderboard
PostTrainBench 1.1 27.2% #8 of 11 Official leaderboard
FDE-Gym 0.03 #9 of 12 Official leaderboard
SWE-Together 58% #18 of 22 Official leaderboard
DesignArena Frontend Web App 1,099 #44 of 53 Official leaderboard
RSI-Exam 33.1% #15 of 18 Official leaderboard
Internal Research Debugging Evaluation 50.5% #5 of 6 Lab model card
Vals RSI Index 0.17 #23 of 27 Official leaderboard
PostTrainBench 1.2 23.9% #18 of 21 Official leaderboard
MirrorCode 23.3% #34 of 39 Epoch AI run
OpenAI-Proof Q&A 1.70% #8 of 9 Lab model card
DesignArena Image to Frontend 1,107 #28 of 31 Official leaderboard
Expert-SWE (OpenAI) 73.1% #2 of 2 Lab model card

Agents and tools

BenchmarkScoreRankSource
GAIA 91.7% #1 of 64 Official leaderboard
SnakeBench 37 #4 of 188 Official leaderboard
Terminal-Bench 2.0 84.7% #1 of 43 Official leaderboard
tau2-bench 98% #2 of 79 Lab model card
Game Arena Coin Game 514 #1 of 39 Official leaderboard
BabaIsBench 100% #1 of 32 Official leaderboard
Pencil Puzzle Bench 83.3% #2 of 53 Official leaderboard
PACT 1,607 #1 of 26 Official leaderboard
Toolathlon 55.6% #2 of 50 Official leaderboard
Clocktower Radio 1,708 #1 of 23 Official leaderboard
SkillsBench 67.3% #1 of 22 Official leaderboard
Game Arena Bargaining 274 #2 of 39 Official leaderboard
Game Arena Poker 25.3 #2 of 31 Official leaderboard
LLM Chess 1,532 #8 of 123 Official leaderboard
Game Arena Dark Hex 492 #3 of 41 Official leaderboard
Game Arena Word Association 563 #3 of 40 Official leaderboard
Chess Puzzles 63% #8 of 93 Epoch AI run
Game Arena Five in a Row 925 #2 of 20 Official leaderboard
LisanBench 9844.7 #14 of 133 Official leaderboard
Harbor-Index 28.1% #1 of 9 Official leaderboard
BrowseComp 90.1% #10 of 81 Lab model card
Mystery Game Puzzles 56% #12 of 84 Epoch AI run
ClawProBench 67.9% #7 of 49 Official leaderboard
WildClawBench 58.2% #5 of 31 Official leaderboard
TUA-Bench 64.7% #2 of 12 Official leaderboard
Game Arena Checkers 1,125 #7 of 41 Official leaderboard
LiveClawBench 74.5% #3 of 17 Official leaderboard
DeepResearch Bench 54% #4 of 22 evals.futuresearch.ai, via Epoch AI
Deep Research Bench (FutureSearch) 0.54 #4 of 21 Official leaderboard
τ³-bench Banking 44.6% #5 of 25 Official leaderboard
Game Arena Ultimate Tic-Tac-Toe 481 #8 of 39 Official leaderboard
Game Arena Chess 1,244 #9 of 42 Official leaderboard
Kaggle Game Arena 409 #9 of 42 Official leaderboard
GameHorizon 73.2 #8 of 37 Official leaderboard
LMArena Search Arena 1,226 #8 of 37 Official leaderboard
WeaveBench 35.1% #2 of 9 Official leaderboard
Game Arena Lines of Action 600 #9 of 39 Official leaderboard
Game Arena Reversi 795 #9 of 39 Official leaderboard
Terminal-Bench 2.1 83.2% #3 of 13 Official leaderboard
MCPMark Verified 92.9% #2 of 8 Official leaderboard
RuneBench 5.68 #20 of 76 Official leaderboard
Toolathlon-Verified 73.5% #7 of 25 Official leaderboard
ClawBench V2 35.4% #2 of 7 Official leaderboard
DiG-bench 25.7% #2 of 7 Official leaderboard
Gaia2-CLI 56.4% #2 of 7 Official leaderboard
OSWorld-Verified 78.7% #12 of 41 Lab model card
Terminal-Bench 2.1 Extended 38% #13 of 44 Official leaderboard
Game Arena Dots and Boxes 974 #12 of 40 Official leaderboard
Game Arena Clobber 414 #12 of 39 Official leaderboard
ScienceBoard 18.3% #5 of 15 Official leaderboard
CAR-bench 60% #4 of 12 Official leaderboard
Game Arena Word Art 1,036 #14 of 39 Official leaderboard
Long-Horizon-Terminal-Bench (LHTB) 44.5% #9 of 25 Official leaderboard
Game Arena Four in a Row 466 #16 of 43 Official leaderboard
ApprenticeBench 20% #7 of 18 Official leaderboard
MobileWorld 43.8% #7 of 18 Official leaderboard
EdgeBench 48.4 #2 of 5 Official leaderboard
SeedClawBench 66.4% #2 of 5 Official leaderboard
PinchBench 2.0 75.5% #24 of 57 Official leaderboard
OSWorld 2.0 13% #3 of 7 Official leaderboard
DeepTerminalBench 32% #4 of 9 Official leaderboard
EBR-bench 34.3% #14 of 31 Epoch AI run
CreativeWork 30.5% #2 of 4 Official leaderboard
WebHarbor 79.7% #2 of 4 Official leaderboard
STATE-Bench 58.9% #1 of 2 Official leaderboard
Game Arena Go 996 #20 of 39 Official leaderboard
Game Arena Nine Men's Morris 621 #20 of 39 Official leaderboard
AutomationBench 16.6% #23 of 42 Official leaderboard
Era by Eon 66.7% #5 of 9 Official leaderboard
MCP Atlas 75.3% #22 of 37 Official leaderboard
Clocktower Bench 1,482 #7 of 11 Official leaderboard
TERMS-Bench 0.61 #7 of 11 Official leaderboard
BrowseComp Extended 19% #27 of 42 Official leaderboard
DuelLab GameBench 2 59.9 #38 of 57 Official leaderboard
MyPCBench 45.1% #6 of 9 Official leaderboard
CEO-Bench $33,260 #14 of 19 Official leaderboard
ARC-AGI-3 0.43% #20 of 27 Official leaderboard
Time Horizon Index: KSP 8.33% #10 of 13 Official leaderboard
TextQuests 21.4 #23 of 28 Official leaderboard

Professional work

BenchmarkScoreRankSource
FORTE 77.8% #1 of 21 Official leaderboard
Vals Index v1 71% #2 of 34 Official leaderboard
CorpFin v2 68.4% #9 of 119 Official leaderboard
ProfBench 58% #6 of 72 Official leaderboard
LegalBench 86.5% #13 of 138 Official leaderboard
FoodTruck Bench $61,408 #6 of 59 Official leaderboard
MortgageTax 68.8% #9 of 87 Official leaderboard
EnterpriseClawBench 66.3% #1 of 9 Official leaderboard
QF-Bench 61.7% #1 of 9 Official leaderboard
Vals Finance Agent 60% #6 of 49 Official leaderboard
Vending-Bench Arena $10,627 #4 of 32 Official leaderboard
CaseLaw v2 66.2% #7 of 53 Official leaderboard
3DCodeArena 1,135 #2 of 14 Official leaderboard
prinzbench 74.0 #4 of 26 Official leaderboard
PhysicianBench 46.3% #2 of 13 Official leaderboard
E-Commerce Bench 7.02 #3 of 19 Official leaderboard
VWE-Bench 57.3% #1 of 6 Official leaderboard
TaxEval v2 75% #25 of 129 Official leaderboard
GDPval 84.9% #2 of 10 Lab model card
MedScribe 86.9% #20 of 97 Official leaderboard
APEX-1 68.4% #17 of 71 Official leaderboard
PatientAgentBench 4.22 #2 of 8 Official leaderboard
Kimi Claw 24/7 Bench 52.8% #1 of 4 Official leaderboard
RedlineBench 50.5% #1 of 4 Official leaderboard
PolicyBench 88% #14 of 50 Official leaderboard
MedCode 49.1% #27 of 96 Official leaderboard
Vending-Bench 2 $7,524 #19 of 67 Official leaderboard
MedXpertQA MM Extended 60.8% #12 of 41 Official leaderboard
TRLawBench 9.38 #10 of 34 Official leaderboard
TaxCalcBench v2 68% #10 of 32 Official leaderboard
OfficeQA Pro 57.1% #4 of 12 Official leaderboard
Excel Modeling Benchmark 64.5% #26 of 76 Official leaderboard
Vals Index v2 57.4% #23 of 65 Official leaderboard
CADGenBench 36% #4 of 11 Official leaderboard
GDPval Extended 1.30% #16 of 43 Official leaderboard
APEX-Agents 1.1 70.3% #25 of 65 Official leaderboard
Legal Research Bench 40.4% #36 of 93 Official leaderboard
CHI-Bench 20.9% #9 of 23 Official leaderboard
EnterpriseBench: CoreCraft 51.3% #20 of 51 Official leaderboard
BankerToolBench v1.1 15% #4 of 10 Official leaderboard
Agent Startup Bench 68.1% #2 of 5 Official leaderboard
SimuVerity 41.7 #2 of 5 Official leaderboard
Tuesday Work Index 54.0 #18 of 44 Official leaderboard
APEX-Agents 55.1% #25 of 61 Collected by Epoch AI, source not named
HealthBench Consensus 95.6% #7 of 17 Lab model card
OfficeQA Pro V2 38.9% #3 of 7 Official leaderboard
YC-Bench $1,206,045 #26 of 59 Official leaderboard
Agents' Last Exam 26.6% #14 of 31 Official leaderboard
Remote Labor Index 6.25% #9 of 19 Official leaderboard
Vals Finance Agent v2 51.8% #39 of 80 Official leaderboard
Harvey LAB (Legal Agent Benchmark) 3.75% #40 of 80 Official leaderboard
GDPevo 64.5% #2 of 4 Official leaderboard
CommerceAgentBench 47.7% #7 of 13 Official leaderboard
Tax Agent Bench 21.8% #51 of 84 Official leaderboard
JobBench 38.3% #10 of 16 Official leaderboard
Public Benefits Bench 60.9% #32 of 50 Official leaderboard
HealthBench Hard 31.5% #14 of 21 Lab model card
APEX-Accounting 56.3% #33 of 49 Official leaderboard
FrontierFinance 43.5% #13 of 17 Official leaderboard
HealthBench 56.5% #24 of 31 Lab model card
Management Consulting Tasks (OpenAI) 31.3% #6 of 7 Official leaderboard
DesignArena Python-PPTX Slides 1,068 #31 of 36 Official leaderboard
HealthBench Professional 51.8% #24 of 26 Lab model card
DesignArena HTML Slides 963 #27 of 28 Official leaderboard

Vision, audio and robotics

BenchmarkScoreRankSource
VisFactor 55.9% #1 of 26 Official leaderboard
MMMU-Pro 83.2% #4 of 90 Lab model card
Math Kangaroo 2025 (MathArena) 94.9% #1 of 22 Official leaderboard
RoboRewardBench 0.66 #1 of 22 Official leaderboard
Code2Video Benchmark 1,571 #2 of 19 Official leaderboard
Vision Arena 1,285 #17 of 136 Official leaderboard
ZeroBench 41% #11 of 76 Official leaderboard
vCX Benchmark 91.9% #7 of 42 Official leaderboard
BabyVision 83.6% #5 of 27 Official leaderboard
MineBench 1,828 #16 of 75 Official leaderboard
ExtractBench 93.3% #6 of 27 Official leaderboard
VoxelBench Image 1,527 #3 of 13 Official leaderboard
MMMU-Pro Extended 43.8% #9 of 38 Official leaderboard
GlobeBench 25.2% #5 of 19 Official leaderboard
VoxelBench 1,915 #15 of 56 Official leaderboard
ClockBench 46.1% #11 of 37 Official leaderboard
PerceptionBench (Moonshot) 55.8% #5 of 16 Official leaderboard
AgenticVBench 31% #3 of 9 Official leaderboard
Blueprint-Bench 2 36.2% #13 of 38 Official leaderboard
CharXiv Extended 82.7% #13 of 38 Official leaderboard
Chartography 31% #15 of 43 Official leaderboard
BVB 68.5 #17 of 45 Official leaderboard
InteractiveBench 30% #5 of 12 Official leaderboard
Furniture Assembly Benchmark 44.2% #15 of 35 Official leaderboard
ParseBench 66.4% #20 of 44 Official leaderboard
Image2FloorPlan 50.7 #2 of 4 Official leaderboard
Drone-Bench 63.9% #10 of 19 Official leaderboard
CC-OCR-Bench-V2 64.2% #9 of 15 Official leaderboard
LongExtractionBench 52.7% #2 of 3 Official leaderboard
ArtifactArena 967 #17 of 21 Official leaderboard
RoboDojo 1.13% #5 of 6 Official leaderboard

Safety and security

BenchmarkScoreRankSource
Capture the Flag (Professional) 96.3% #1 of 21 Lab model card
Cyber Range 93.3% #1 of 10 Lab model card
SusVibes 43.5% #1 of 10 Official leaderboard
CyberBench (Vals) 80.5% #3 of 26 Official leaderboard
KORA 67% #5 of 42 Official leaderboard
Destructive action avoidance 90% #1 of 8 Lab model card
Human Pathogen Capabilities Test v2 (HPCT v2) 66.2% #9 of 71 Official leaderboard
Human Pathogen Capabilities Test 66.8% #11 of 86 Official leaderboard
nocot-bench (NCRI) 100.2 #24 of 185 Official leaderboard
World-Class Bio 59.7% #10 of 74 Official leaderboard
Molecular Biology Capabilities Test 57.1% #14 of 90 Official leaderboard
SEC-bench Pro 46.4% #1 of 6 Official leaderboard
SEC-bench Pro 260617 58.4% #1 of 6 Official leaderboard
EpiBench 28.3% #5 of 27 Official leaderboard
BrowseSafe++ 89.3% #3 of 15 Official leaderboard
CVE-Bench 93.1% #3 of 14 Lab model card
ExploitBench 72% #2 of 9 Official leaderboard
BiomniBench 63.6 #2 of 8 Official leaderboard
DTap Prompt Injection 17.7% #2 of 8 Official leaderboard
LifeSciBench 51.9% #1 of 4 Official leaderboard
FORTRESS 16.3% #19 of 73 Official leaderboard
Tacit Knowledge and Troubleshooting 78.3% #8 of 30 Lab model card
PatchEval 81.3% #2 of 7 Official leaderboard
PatchEval-Verified 81.3% #2 of 7 Official leaderboard
SpatialBench-Long 32.1% #8 of 27 Official leaderboard
CyberGym 81.8% #11 of 34 Official leaderboard
GeneBench Pro 20.5% #4 of 12 Official leaderboard
BrowseSafe-Adapt 65.2% #2 of 6 Official leaderboard
PCT (Polarized Contrastive Pairs) 40% #16 of 46 Official leaderboard
TroubleshootingBench 44.1% #7 of 20 Lab model card
scBench-Long 21.6% #10 of 27 Official leaderboard
DTap Direct Misuse 28.9% #3 of 8 Official leaderboard
DrugDiscoveryBench 51.6% #8 of 20 Official leaderboard
BioTIER Refuse 75.3% #28 of 69 Official leaderboard
ProtocolQA Open-Ended 37.3% #11 of 27 Lab model card
VCT-v2 45.3% #11 of 25 Official leaderboard
Multimodal Troubleshooting Virology 53.7% #12 of 27 Lab model card
DeepsecBench 21.0 #13 of 29 Official leaderboard
Dictatorship Eval 82.5% #9 of 20 Official leaderboard
BioSecBench-Surveillance 47.1% #13 of 27 Official leaderboard
TxBench-Preclinical-Pharmacology 55.3% #15 of 30 Official leaderboard
DNA sequence design for transcription factor binding 13.8% #2 of 4 Lab model card
Hard-negative protein binding prediction 1.48% #2 of 4 Lab model card
GeneBench 33.2% #1 of 2 Lab model card
SRE-Bench 3.82% #18 of 35 Official leaderboard
CyScenarioBench 26% #9 of 17 Lab model card
ExploitGym 14.8% #10 of 18 Official leaderboard
OncologyBench 14.7% #19 of 30 Official leaderboard
TxBench-Oligo-Discovery 33.9% #19 of 30 Official leaderboard
BioTIER Permit 99% #47 of 69 Official leaderboard
HackBench 50.9 #6 of 8 Official leaderboard
UK AISI cyber ranges 10% #3 of 4 Lab model card
TxBench-Antibody-Discovery 33% #23 of 30 Official leaderboard
VariantBench 30.5% #21 of 27 Official leaderboard
BioSecBench-Function 28.3% #22 of 27 Official leaderboard
First-Person Fairness evaluation 1.12% #10 of 10 Lab model card
CoT-Control 0.20% #9 of 9 Lab model card
Agent JSK 96.3% #7 of 7 Lab model card
OpenAI Deployment Simulation 0.01% #5 of 5 Lab model card
Capture the Flag (Internal) 88.1% #4 of 4 Lab model card
Biochemistry knowledge improvement 32.3% #2 of 2 Lab model card
UK AISI narrow cyber tasks 90.5% #2 of 2 Lab model card
BashArena 99.1% #1 of 1 Lab model card

Other

BenchmarkScoreRankSource
ACCoRD 80.5 #11 of 152 Official leaderboard
Conceptual Reasoning Index 67.3 #16 of 151 Official leaderboard
LMCA 54.3% #19 of 147 Official leaderboard
SAGE (Vals) 51.5% #13 of 81 Official leaderboard
Artificial Analysis Intelligence Index v4.0 60.2 #1 of 5 Lab model card
CompassRank 80.6 #3 of 14 Official leaderboard
CAIS Text Capabilities Index 46.3 #15 of 68 Official leaderboard
CAIS Vision Capabilities Index 64.3 #13 of 53 Official leaderboard
Vals Multimodal Index 68.1% #9 of 33 Official leaderboard
CAIS Risk Index 42.4 #20 of 67 Official leaderboard
StudentBench 12.8 #8 of 11 Official leaderboard

Its lab's numbers put it at 160.8, in line with its ECI

The Self-Reported Index fits one score to the 23 capability results OpenAI reported for this model, on the scale of the Epoch Capabilities Index. Labs choose which benchmarks to show and how to run them, so read it as the lab's claim, not an independent measurement. The 90% interval runs from 158.0 to 163.6. How we compute it.

Its lab's numbers next to 12 leaderboards

Where the benchmark's own leaderboard, or Epoch AI's run, also has this model. Gaps mostly come from different harnesses, effort levels and task subsets. Every pair.

Benchmark Lab says Board says Gap
OpenAI MRCR v2 87.5% OpenAI MRCR v2 8-needle 128K-256K 87.5% (512K-1M 74.0%) 75.3% Leaderboard, 8-needle, 128K to 256K bin, high reasoning +12 pts
FrontierMath Tier 4 39.6% FrontierMath Tier 4 (GPT-5.5 Pro) 35.4% Epoch AI run, xhigh +4.2 pts
OfficeQA Pro 54.1% OfficeQA Pro 57.1% Leaderboard, Codex SDK −3.0 pts
Terminal-Bench 2.0 82.7% Terminal-Bench 2.0 84.7% Leaderboard, NexAU-AHE −2.0 pts
FrontierMath 52.4% FrontierMath Tier 1–3 (GPT-5.5 Pro) 51.7% Epoch AI run, xhigh +0.7 pts
GPQA Diamond 93.6% GPQA Diamond 94% Epoch AI run, xhigh −0.4 pts
Vals Finance Agent 60% FinanceAgent v1.1 60% Leaderboard Same
ARC-AGI 95% ARC-AGI-1 (Verified) 95% Leaderboard, xhigh Same
ARC-AGI-2 85% ARC-AGI-2 (Verified) 85% Leaderboard, xhigh Same
CyberGym 81.8% CyberGym 81.8% Leaderboard, OpenAI Agent Same
MCP Atlas 75.3% MCP Atlas 75.3% Leaderboard, xhigh Same
Toolathlon 55.6% Toolathlon 55.6% Leaderboard, xhigh Same

OpenAI's models over time

OpenAI's models in color, against every other model on the Epoch Capabilities Index, by release date.

50 100 150 2023 2024 2025 2026 2027 GPT-6.1 Terra GPT-6 Luna GPT-5.4 Mini GPT-5.2 Pro GPT-5 GPT-5 nano GPT-4.1 nano 50 100 150 2023 2024 2025 2026 2027 GPT-6.1 Terra GPT-6 Luna

Source: Epoch Capabilities Index, Epoch AI (CC BY 4.0)

Its launch post

The benchmarks the lab chose to headline, with the scores it gave.

Introducing GPT-5.5 Apr 23, 2026

Its system card

Every result in the longer documents the lab published with it. 41 of them aren't in the launch post.

GPT-5.5 System Card Apr 23, 2026

Monitorability