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OpenAI: Codex Mini

openai/codex-mini

codex-mini-latest is a fine-tuned version of o4-mini specifically for use in Codex CLI. For direct use in the API, we recommend starting with gpt-4.1.

Modalities

Context

200K

Released

May 16, 2025

Knowledge Cutoff

Jun 2024

About OpenAI: Codex Mini

OpenRouter makes OpenAI: Codex Mini available through a unified, OpenAI-compatible API using the model ID openai/codex-mini.

OpenAI: Codex Mini accepts images and text and returns text. It has a 200,000-token context window.

It was released on May 16, 2025; its knowledge cutoff is June 30, 2024.

More models from OpenAI

  • GPT Transcribe
  • GPT-5.6 Luna Pro
  • GPT-5.6 Luna

Frequently asked questions

codex-mini-latest is a fine-tuned version of o4-mini specifically for use in Codex CLI. For direct use in the API, we recommend starting with gpt-4.1.

Codex Mini has a 200,000 token context window.

Codex Mini accepts images and text as input and returns text.

GPT-5.6 Luna Pro, GPT-5.6 Luna, GPT-5.6 Terra Pro and 56 more are other text models from OpenAI.

Codex Mini was released on May 16, 2025. Its knowledge cutoff is June 30, 2024.

ActivityFAQ

Activity

Token volume and request traffic to this model over time.