What is GPT-5.1-Codex Mini?

GPT-5.1-Codex Mini is a large language model from OpenAI, released on November 13, 2025. It accepts text and image input.

When was GPT-5.1-Codex Mini released?

OpenAI released GPT-5.1-Codex Mini on November 13, 2025.

How much does GPT-5.1-Codex Mini cost?

GPT-5.1-Codex Mini costs $0.25 per 1M input tokens and $2 per 1M output tokens through the OpenAI API. Cached input costs $0.025 per 1M tokens. Prices are from OpenAI's official pricing as of October 5, 2026.

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

GPT-5.1-Codex Mini has a 400K-token context window and can generate up to 128K output tokens.

How does GPT-5.1-Codex Mini score on benchmarks?

GPT-5.1-Codex Mini has 1 cited benchmark score, including LMArena WebDev (LMArena) 1243.6 Elo. Each score links to its source.

GPT-5.1-Codex Mini

OpenAI·Degraded·Released 2025-11-13textvision

Context400k

Max output128k

Input / 1M$0.25 ↗

Output / 1M$2 ↗

Cached in$0.025

Benchmarks1

Benchmarks

Cited public sources · rank is exact-benchmark, apples-to-apples

LMArena WebDev (LMArena)

#86/941243.6 ↗

Compare

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GPT-5.1-Codex Mini FAQ

What is GPT-5.1-Codex Mini?: GPT-5.1-Codex Mini is a large language model from OpenAI, released on November 13, 2025. It accepts text and image input.
When was GPT-5.1-Codex Mini released?: OpenAI released GPT-5.1-Codex Mini on November 13, 2025.
How much does GPT-5.1-Codex Mini cost?: GPT-5.1-Codex Mini costs $0.25 per 1M input tokens and $2 per 1M output tokens through the OpenAI API. Cached input costs $0.025 per 1M tokens. Prices are from OpenAI's official pricing as of October 5, 2026.
What is GPT-5.1-Codex Mini's context window?: GPT-5.1-Codex Mini has a 400K-token context window and can generate up to 128K output tokens.
How does GPT-5.1-Codex Mini score on benchmarks?: GPT-5.1-Codex Mini has 1 cited benchmark score, including LMArena WebDev (LMArena) 1243.6 Elo. Each score links to its source.

Access GPT-5.1-Codex Mini and every other model through one endpoint with automatic failover: Respan gateway.