What is the context window of GPT-5.1 Codex Mini?

GPT-5.1 Codex Mini has a context window of 400000 tokens.

When was GPT-5.1 Codex Mini released?

GPT-5.1 Codex Mini was released on 2025-11-13.

GPT-5.1 Codex Mini

Name: GPT-5.1 Codex Mini
Author: OpenAI

ProprietaryMultimodal

About

GPT-5.1 Codex Mini is a smaller, faster, and more cost-efficient agentic coding model in the GPT-5.1 Codex lineup. Delivers approximately 4x more usage within ChatGPT subscriptions compared to GPT-5.1 Codex Max at a slight capability tradeoff. Priced at $0.25 per 1M input tokens and $2 per 1M output tokens via API. Available in the Codex CLI and IDE extension, where it is offered automatically when users approach their usage limit.