OpenAI
GPT-5.1 Codex mini is a smaller, faster, and cheaper version of GPT-5.1 Codex.
Introducing GPT-5Rank #84 across 526
Rank #82 across 436
Rank #162 across 357
Percentile score by analysis domain.
* Cost is inverted: lower input, output, and blended prices rank higher.
Higher bars mean stronger relative placement.
| Metric | Domain | Value | Rank |
|---|---|---|---|
| Artificial Analysis Intelligence Index | overall | 38.6 | #84 |
| Artificial Analysis Coding Index | coding | 36.4 | #82 |
| Artificial Analysis Math Index | math | 91.7 | #19 |
| MMLU-Pro | reasoning | 82.0% | #76 |
| reasoning |
| 81.3% |
| #104 |
| Humanity's Last Exam | reasoning | 16.9% | #101 |
| LiveCodeBench | coding | 83.6% | #19 |
| SciCode | coding, reasoning | 42.6% | #72 |
| Output Speed | speed | 213.6 tok/s | #27 |
| Time to First Token | speed | 3.79s | #246 |
| Blended Price | cost | $0.688/M | #162 |
| Input Price | cost | $0.250/M | #129 |
| Output Price | cost | $2.00/M | #181 |
| Value Index | cost, overall | 56.1 | #117 |