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GPT-5.1 Codex
🇺🇸OpenAI8mo
Neura Index
69.3
Rank #70—
lowCategory Profile
Benchmark Scores (1)
coding
| Benchmark | Score | Source |
|---|---|---|
| SWE-bench Verified | 73.7 | verified |
Performance History
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Frequently Asked Questions about GPT-5.1 Codex
What is GPT-5.1 Codex's Neura Intelligence Index score?▾
GPT-5.1 Codex by OpenAI scores 69.3 out of 100 on the Neura Intelligence Index, ranking #70 among tracked AI models. This composite score is computed from 1 individual benchmarks across coding, math, reasoning, and language categories.
Is GPT-5.1 Codex open source?▾
No, GPT-5.1 Codex is a proprietary model by OpenAI. It is only accessible via their API.
What benchmark does GPT-5.1 Codex perform best on?▾
GPT-5.1 Codex achieves its highest score on SWE-bench Verified with a score of 73.7%. This benchmark evaluates real-world github issue resolution — 500 verified problems from popular python repos.