OpenAI

GPT-5.1-Codex-Mini

openai/gpt-5.1-codex-mini

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Specification

Published by the vendor; the platform bills at the target's declared price.

GPT-5.1-Codex-Mini

reasoning tools

OpenAI openai/gpt-5.1-codex-mini

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

Input $/1M: $0.25
Output $/1M: $2.00
Context: 400K
Max output: 128K
Released: Nov 13, 2025
Modalities: imagetext

Cached input reads $0.03 per 1M

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targets.yamlyaml

# targets.yaml - declare a target that runs GPT-5.1-Codex-Mini
targets:
  - id: gpt-5-1-codex-mini
    kind: llm
    name: GPT-5.1-Codex-Mini
    metadata:
      model: openai/gpt-5.1-codex-mini          # links the target to this catalogue entry
    capabilities:
      domains: [general]
      supports_tools: true
      context_window: 400000
    cost:
      usd_per_1k_tokens: 0.001125

Price among OpenAI models

Input list price per million tokens; GPT-5.1-Codex-Mini is the 5th cheapest of 13 listed.

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