GPT-5.1 Codex Mini

OpenAI

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

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Capabilities

Thinking

Tool Use

Image Input

Technical Specifications

Context Window

400,000 tokens

Max Output

100,000 tokens

Pricing

Token Costs (per 1M tokens)

Cache Miss Input

$0.25

Non-Reasoning Output

$2

Cache Read Input

$0.025

Tool Costs (per 1K calls)

Web Search

$15

Code Execution

$0.19

Legacy

Made legacy on

Reason

Superseded by GPT-5.2 Codex; variant discontinued

Recommended Replacement

GPT-5.3 Codex