OpenAI: GPT-5.1-Codex-Mini

OpenAIID: openai/gpt-5.1-codex-mini

GPT-5.1-Codex-Mini is a smaller and faster version of GPT-5.1-Codex

Pricing per 1M Tokens

Input (Prompt)$0.25
Output (Completion)$2.00
Cache Read$0.02
Cache WriteFree
ImageN/A

Specifications

Context Length400K
Max Output Tokens100K
Input ModalitiesImage + Text
Output ModalitiesText
TokenizerGPT
Instruct TypeN/A
Top Provider Context400K
Top Provider Max Output100K
ModeratedYes

Compare this model

See how OpenAI: GPT-5.1-Codex-Mini stacks up against other models.

vs OpenAI: GPT-5.4 Nanovs OpenAI: GPT-5.4 Minivs OpenAI: GPT-5.4 Provs OpenAI: GPT-5.4vs OpenAI: GPT-5.3 Chat

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Last updated: March 23, 2026

First tracked: March 23, 2026