GPT-5.1
GPT-5.1Alternatives?
CheaperMuse Spark 1.3maxwins 60%-42%$1.60Only auto tool_choice is supported+5BetterGPT-5.6 Terraxhighwins 53%+31%$0.63Prompts with >272K input tokens
OpenGLM 5.3maxwins 57%-37%$2.01No image input+4
CheaperGemini 3.6 Flashhighwins 57%-56%*$1.60CheaperMuse Spark 1.2xhighwins 57%-42%$0.97Only auto tool_choice is supported+1Muse Spark 1.3maxwins 60%-42%$1.60Only auto tool_choice is supported+5Gemini 3.6 Flashhighwins 57%-56%*$1.60Muse Spark 1.2xhighwins 57%-42%$0.97Only auto tool_choice is supported+1GLM 5.3maxOpenwins 57%-37%$2.01No image input+4Muse Sparkunstatedwins 57%-42%$1.25 / $4.25Only n=1 · Meta / Chat Completions+1GPT-5.6 Terraxhighwins 53%+31%$0.63Prompts with >272K input tokensGPT-6.1 Solmaxwins 53%+16%$0.72Remove unsupported parameters+5Muse Spark 1.2xhighwins 57%-42%$0.97Only auto tool_choice is supported+1GPT-5.6 Solxhighwins 54%+133%$1.18Gemini 3.8 Flashhighwins 56%-56%*$1.24Sampling parameters are ignored+1GLM 5.3maxOpenwins 57%-37%$2.01No image input+4GLM 5.3 FlashunstatedOpenwins 56%-93%$0.15 / $0.50Defaults to max · Self-hosted+4
MiMo v2.5 ProunstatedOpenwins 55%-84%$0.43 / $0.87No image input
Kimi K3maxOpenwins 55%+75%$2.00Sampling parameters are fixed+3GLM 5.2maxOpenwins 54%-37%$1.47No image inputGPT-5.4highwins 56%—$2.50 / $15GPT-5.5highwins 55%—$1.54Prompts with >272K input tokensGPT-5.6 Solxhighwins 54%—$1.18GPT-6.1 Solmaxwins 53%—$0.72Remove unsupported parameters+5GPT-5.6 Terraxhighwins 53%—$0.63Prompts with >272K input tokensGPT-5.6 Lunaxhighsame—$0.085GPT-5.2highsame—$1.75 / $14GPT-6 Astramaxsame—$3.26Monitoring can return HTTP 403+2All OpenAI models →History
17 versionsBenchmarks
in Chat & KnowledgeFAQ
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?›
#88 of 334 in Chat & Knowledge, #72 of 97 in Coding, #97 of 175 in Agents & Tool Use, #46 of 195 in Writing & Language, #43 of 124 in Vision & Documents. Strongest at: Science, Long context, Knowledge, Instructions.
Is GPT-5.1 better than GPT-5?›
On Arena Text · French, GPT-5.1 scores 1,450 vs 1,407.6 — higher.
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 It has been superseded by GPT-6 Sol.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 GLM 5.3.
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, the successor to GPT-5.
What are the best alternatives to GPT-5.1?›
Muse Spark 1.3 (cheaper), GPT-5.6 Terra (better), GLM 5.3 (open weights).