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
- Design Arena fullstack (other) : 1086 elo · #27
- Design Arena mobileapps (other) : 1198 elo · #17
- Design Arena webapps (other) : 1075 elo · #32
- Design Arena codecategories (other) : 1187 elo · #57
Notes
GPT-5.1-Codex is listed in the EDNA Models directory from the OpenRouter catalogue.
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