GPT-5.1-Codex
GPT-5.1-Codex.
OpenAI Released 12 Nov 2025
13
Benchmarks with a score
0
Ranked first, out of five or more models
0
In the top three
OpenAI Nov 2025
GPT-5.1-Codex
Closed weights
No Epoch Capabilities Index score yet
- Terminal-Bench 2.0 57.8% #13 /43
- Vibe Code Bench v1 13.1% #10 /17
- Vibe Code Bench 13.1% #94 /115
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
| Benchmark | Score | Rank | Source | |
|---|---|---|---|---|
| Wer wird Millionär? LLM Benchmark | 291667.0 | #8 of 76 | Official leaderboard | |
| BullshitBench | 29.1% | #50 of 107 | Official leaderboard | |
| BullshitBench V2 | 32% | #67 of 122 | Official leaderboard |
Coding
| Benchmark | Score | Rank | Source | |
|---|---|---|---|---|
| ALE-Bench | 1,245 | #37 of 121 | Epoch AI | |
| SWE-bench Verified | 66% | #20 of 60 | Official leaderboard | |
| Vibe Code Bench v1 | 13.1% | #10 of 17 | Official leaderboard | |
| Vibe Code Bench | 13.1% | #94 of 115 | Official leaderboard | |
| WebDev Arena | 1,336 | #86 of 105 | Epoch AI | |
| Code Arena | 1,337 | #102 of 124 | Official leaderboard | |
| IOI (Vals) | 3.67% | #46 of 55 | Official leaderboard |
Agents and tools
| Benchmark | Score | Rank | Source | |
|---|---|---|---|---|
| SnakeBench | 32 | #27 of 183 | Official leaderboard | |
| Terminal-Bench 2.0 | 57.8% | #13 of 43 | Official leaderboard | |
| LLM Chess | 504 | #40 of 124 | Official leaderboard |