AI Observatory / Model Radar OpenAI / openai/gpt-5.1-codex-mini

OpenAI: GPT-5.1-Codex-Mini

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

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400,000 Context
128,000 Max output
$0.25 / 1M Prompt price
2025-11-13 Created
01 / Snapshot

Pricing, context, modalities, and parameters.

Model Radar detail pages stay neutral and operator-readable: core metadata first, then workflow fit.

Provider OpenAI Input modalities image, text
Output modalities text Prompt price $0.25 / 1M
Completion price $2.00 / 1M Request price N/A
Context length 400,000 Max completion tokens 128,000
Supported parameters include_reasoning, max_completion_tokens, max_tokens, reasoning, response_format, seed, structured_outputs, tool_choice, tools
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OpenAI: GPT-5.1-Codex-Mini

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

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03 / Colophon

Routes and exits.

Each model page stays simple: overview, compare, related models, then back to the public hub.