GPT-5.1-Codex
by OpenAI
GPT-5.1-Codex is a specialized version of GPT-5.1 optimized for software engineering and coding workflows. It is designed for both interactive development sessions and long, indepe
Models
GPT-5.1-Codex
Added 10 July 2026
Overview
GPT-5.1-Codex is a specialized version of GPT-5.1 optimized for software engineering and coding workflows. It is designed for both interactive development sessions and long, independent execution of complex engineering tasks....
How to use / API access
Call via OpenRouter with model id `openai/gpt-5.1-codex`.
- openrouter ·
openai/gpt-5.1-codexDocs
OpenRouter id: openai/gpt-5.1-codex
Benchmarks
- Intelligence Index (artificial-analysis): 23.7 index
- Design Arena fullstack (other): 1086 elo · #30
- Design Arena mobileapps (other): 1191 elo · #18
- Design Arena webapps (other): 1015 elo · #41
- Design Arena codecategories (other): 1154 elo · #83
Notes
GPT-5.1-Codex is listed in the EDNA Models directory from the OpenRouter catalogue.
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