GPT-5.1

Nov 2025
Retires Apr 1, 2027Move toGPT-6.1 SolNewer version
GPT-5.1
Compare in
on
—per task?
$1.25 / $10per 1M in / outcache $0.13
138 tok/sfirst token in 46 s?
400Kcontext

Alternatives?

History

17 versions
8890929496Oct 25Release dateMathArena · CMIMC 20255 · Aug5.1 · Nov5.2 · Dec
8890929496Oct 25Release dateMathArena · CMIMC 20255 · Aug5.1 · Nov

FAQ

How much does GPT-5.1 cost?›

$1.25 per 1M input tokens and $10 per 1M output tokens; cached input $0.13 per 1M.

Is GPT-5.1 free to use?›

There is no free API; the cheapest paid price is $1.25 per 1M input tokens.

How good is GPT-5.1, and what is it best at?›

#90 of 336 in Chat & Knowledge, #72 of 97 in Coding, #139 of 177 in Agents & Tool Use, #42 of 197 in Writing & Language, #44 of 125 in Vision & Documents. Strongest at: Science, Long context, Knowledge, Instructions.

Is GPT-5.1 better than DeepSeek V3.2 Speciale?›

On MathArena · CMIMC 2025, GPT-5.1 scores 94.4 vs 95.6 — about the same.

How can I use GPT-5.1?›

Through the API of Azure, OpenAI.

What is the context window of GPT-5.1?›

400K tokens, with up to 128K output tokens.

When was GPT-5.1 released? Is there a newer version?›

Released 2025-11-13. It has been superseded by GPT-6 Sol.

Is GPT-5.1 open source?›

No, GPT-5.1 is a closed model available through an API. The closest open-weights option here is DeepSeek V3.2 Speciale.

Can GPT-5.1 read images?›

It accepts text and images, PDF files as input.

What is GPT-5.1?›

GPT-5.1 is a closed language model from OpenAI, released Nov 2025.

What are the best alternatives to GPT-5.1?›

GLM 5 (cheaper), DeepSeek V3.2 Speciale (open weights).