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...
Rank
#263
Up 108% week over week
Tokens
657.2M
2026-08-14
Requests
39.1K
39,073
Tool calls
-
Input / M
$1.25
Output / M
$10
Cache / M
$0.13
Context
400K
400,000 tokens