Provider OpenAI

Model Code gpt-5.1-codex-max

Model Type LLM

Licence Proprietary

Status Active

Deployment Option Hosted API only

Input Modality Text, Image

Output Modality Text

Context Length 400k

Release Date December 19, 2025

Documentation URL https://platform.openai.com/docs/models/gpt-5.1-codex-max ↗