OpenAI: GPT-5.1-Codex-Max
GPT-5.1-Codex-Max is OpenAI’s latest agentic coding model, designed for long-running, high-context software development…
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Open / InstallLast updated July 27, 2026
Description
GPT-5.1-Codex-Max is OpenAI’s latest agentic coding model, designed for long-running, high-context software development tasks. It is based on an updated version of the 5.1 reasoning stack and trained on agentic...
Author
openai
Platform
api
Pricing model
paid
Categories
Coding
Research
Tags
openrouter
llm
openai
text
image
Capabilities
- Image input
- 400,000 token context