GPT-5.1 Codex (High): benchmark results
GPT-5.1 Codex evaluated at the high reasoning-effort setting. Provider: OpenAI. Released 2025-11-13. Access: API.
Aggregate Rating 1691 ± 19, rank #387 of 2168 rated models, from 73 benchmark results.
Strongest benchmark results
| Benchmark | Score | Metric | Percentile |
|---|---|---|---|
| Sonar LLM Leaderboard - Java - Bug Density | 0.52 | Bugs per 1,000 lines of code (lower is better) | 98.6 |
| AA AIME 2025 | 95.67 | Accuracy (%) | 97.2 |
| AA LiveCodeBench | 84.87 | Pass@1 (%) | 95.9 |
| AA MMLU-Pro | 86.01 | Accuracy (%) | 94.5 |
| AA Global-MMLU-Lite - French | 92.75 | Accuracy (%) | 93.6 |
| AA Global-MMLU-Lite - Hindi | 90.58 | Accuracy (%) | 93.6 |
| AA Global-MMLU-Lite - Swahili | 89.5 | Accuracy (%) | 93.2 |
| AA Global-MMLU-Lite - Japanese | 91.08 | Accuracy (%) | 91.8 |
| AA Global-MMLU-Lite - Spanish | 92.75 | Accuracy (%) | 90 |
| AA Global-MMLU-Lite - Bengali | 89.92 | Accuracy (%) | 89.1 |
| AA Global-MMLU-Lite - Yoruba | 79.75 | Accuracy (%) | 89.1 |
| ALE-Bench | 1244.92 | Performance (Self-Refine x1) (imported) | 87.8 |
Interactive version: theaggregate.ai/model?slug=gpt-5-1-codex-high · How It Works · Data refreshed daily, snapshot 2026-10-20.