0.80
CONFIRMED89% CONFIDENCEDated from the release notes leave this entry undated; the Codex changelog dates GPT-5-Codex-Mini's introduction Nov 7, 2025[1]
- Start
- Nov 7, 202595% CONFIDENCEfrom help.openai.com
GPT-5-Codex-Mini Released
OpenAI adds GPT-5-Codex-Mini, a smaller, cheaper GPT-5-Codex with about 4x more usage, to the Codex CLI and IDE extension.
- GPT-5-Codex-Mini was added on November 7, 2025[3]
- It preceded GPT-5.1-Codex and Mini (November 13, 2025) and GPT-5.1-Codex-Max (November 18-19, 2025)[1][3]
Notable features
- GPT-5-Codex-Mini is a smaller, more cost-effective but less capable version of GPT-5-Codex, offered as the gpt-5-codex-mini model option in the Codex CLI and IDE Extension[3]
- It is a smaller model with up to 4x more usage, and Codex offers it at 90% of the 5-hour usage limit[1]
- Its parent GPT-5-Codex is a version of GPT-5 optimized for agentic coding, with a 400,000-token context window, 128,000 max output tokens and text and image input[2]
References 389% CONFIDENCE
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- [1]95%OpenAI Model Release Notes: Introducing GPT-5-Codex-Minihelp.openai.com· Posted Sep 19, 2026· Starts Nov 7, 2025· 33% of score
Dated from the release notes leave this entry undated; the Codex changelog dates GPT-5-Codex-Mini's introduction Nov 7, 2025
- [2]88%GPT-5-Codex Model | OpenAI APIdevelopers.openai.com· Added Sep 22, 2026· 34% of score
OpenAI's[1][3] API model page describes GPT-5-Codex as "a version of GPT-5 optimized for agentic coding tasks in Codex" with a 400,000 context window and 128,000 max output tokens.
- [3]85%Codex changelog: Introducing GPT-5-Codex-Minidevelopers.openai.com· Added Sep 19, 2026· Starts Nov 7, 2025· 33% of score
The Codex changelog introduces gpt-5-codex-mini on Nov 7, 2025.[1]
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