GPT-5.2-Codex
OpenAI·Released Dec 11, 2025
Updated Oct 8, 11:55 PM ET
The score is on the board's scale (reference average 50, about 15 points per standard deviation), not a percentage.
By domain
Each domain is scored on the same scale as the overall score. Coverage is the share of the domain's kinds of evaluation with a result; it says how much evidence there is, not how good the model is.
Every result behind the score
The result as the evaluator publishes it, and the reading it gives on the board's scale. A hard evaluation can give a high reading for a modest result; results near 95% or 5% only say "at least" or "at most".
Coding
2 results · 49.3- LiveBench CodingLiveBench66.5%Reading 57.9
- Vibe Code BenchVals AI · high effort37.9%Reading 40.8
Research and reasoning
2 results · 47.9- Humanity's Last Exam (AA run)Artificial Analysis · xhigh effort35.7%Reading 50.7
- LiveBench ReasoningLiveBench83.2%Reading 44.4
Professional work
2 results · 57.2- LiveBench Data AnalysisLiveBench78.2%Reading 68.1
- τ²-Bench Telecom (AA run)Artificial Analysis · xhigh effort92.1%Reading 50.5
Knowledge and accuracy
5 results · 45.7- IFBench (AA run)Artificial Analysis · xhigh effort77.6%Reading 59.0
- AA-LCRArtificial Analysis · xhigh effort82.3%Reading 53.2
- LiveBench Instruction FollowingLiveBench66.4%Reading 48.2
- LiveBench LanguageLiveBench73.7%Reading 41.6
- BullshitBenchBullshitBench · high effort29.1%Reading 24.9
Shown, not scored
Composite indices, saturated or older evaluations, evaluations still being checked, and vision, writing and multilingual results. They do not move the score.
- LiveCodeBenchVals AI · CodingReference only88.0%
- SWE-bench VerifiedVals AI · CodingReference only72.4%
- AA Intelligence IndexArtificial Analysis · Composite indicesReference only28.5
- LiveBench averageLiveBench · Composite indicesReference only74.0%
- Arena WebDevLMArena · Writing and designReference only1,339.4
No result yet
Scored evaluations this model has not taken. A missing result neither adds nor subtracts.
- Terminal-Bench 4.0 · Vals AI
- Terminal-Bench 4.0 (AA run) · Artificial Analysis
- Code Migration · Vals AI
- ProgramBench · Vals AI
- Vibe Code Bench 1–100 · Vals AI
- CyberBench Patch · Vals AI
- APEX-SWE · Mercor
- SciCode · Artificial Analysis
- FrontierMath Tiers 1–3 · Epoch AI
- FrontierMath Tier 4 · Epoch AI
- Chess Puzzles · Epoch AI
- Mystery Game Puzzles · Epoch AI
- MysteryMechanism · Vals AI
- Terminal-Bench Science · Vals AI
- ProofBench · Vals AI
- Finance Agent · Vals AI
- APEX-Agents · Mercor
- Harvey Legal Agent Benchmark · Vals AI
- MedCode · Vals AI
- Legal Research Bench · Vals AI
- Tax Agent Bench · Vals AI
- EMB · Vals AI
- τ-Bench Banking (AA run) · Artificial Analysis
- SimpleQA Verified · Epoch AI
- Arena Text · LMArena