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GPT-5.1-Codex-Mini pricing & benchmarks

GPT-5.1-Codex-Mini is available from OpenAI at $0.250 per million input tokens and $2.00 per million output tokens ($0.688 blended at 3:1). It accepts up to 400,000 tokens of context. GPT-5.1-Codex-Mini is a smaller and faster version of GPT-5.1-Codex

Pricing

Per million tokens · OpenRouter

Input$0.250

Output$2.00

Blended (3:1)$0.688

Specification

openai/gpt-5.1-codex-mini

Context window400K

Max output128K

ReleasedNov 2025

LicenceProprietary

Modalitiesin:text, in:image, out:text

No independently-run benchmark scores are published for GPT-5.1-Codex-Mini yet. We show nothing rather than reprinting an unverified figure.

Compare GPT-5.1-Codex-Mini

GPT-5.1-Codex-Mini vs Qwen3.8 Max GPT-5.1-Codex-Mini vs DeepSeek V4 Flash 0731 GPT-5.1-Codex-Mini vs Claude Opus 5 GPT-5.1-Codex-Mini vs Gemini 3.6 Flash GPT-5.1-Codex-Mini vs Kimi K3 GPT-5.1-Codex-Mini vs Grok 4.5 GPT-5.1-Codex-Mini vs Claude Sonnet 5 GPT-5.1-Codex-Mini vs GLM 5.2

FAQ

How much does GPT-5.1-Codex-Mini cost?

GPT-5.1-Codex-Mini costs $0.250 per million input tokens and $2.00 per million output tokens on OpenRouter. At a 3:1 input:output mix that blends to $0.688 per million tokens.

What is GPT-5.1-Codex-Mini's context window?

GPT-5.1-Codex-Mini accepts up to 400,000 tokens of context, and can generate up to 128,000 output tokens.