OpenAI: GPT-5.1-Codex-Mini
openai/gpt-5.1-codex-mini
Context: 400,000In: $0.25/1MOut: $2.00/1MUpdated 2026-10-04
GPT-5.1-Codex-Mini is a smaller and faster version of GPT-5.1-Codex
Intelligence
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Coding
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Agentic
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Metric profile
Trend over time
Classic evals (curated from model cards)
OpenAI GPT — manually maintained, may lag releases
MMLU-Pro
79.6%
GPQA Diamond
81.5%
HumanEval
96.8%
MATH-500
93%
Design Arena (ELO by category)
| Category | ELO | Win rate | Rank |
|---|---|---|---|
| website | 1117 | 42.8% | #95 |
| asciiart | 1115 | 43% | #56 |
| dataviz | 1105 | 40.6% | #93 |
| gamedev | 1105 | 43.4% | #88 |
| codecategories | 1100 | 41.5% | #95 |
| uicomponent | 1088 | 41% | #93 |
| 3d | 1004 | 32.8% | #105 |
| svg | 977 | 35.3% | #86 |