o1
o1Alternatives?
CheaperClaude Opus 5.5highwins 75%-70%$1.82No forced tool use+5BetterGPT-6 Lunamaxwins 52%-99%$0.068Function calling only with none · Chat Completions+3
OpenMiMo v2.6 Prounstatedwins 67%-98%$0.43 / $0.87Pass back reasoning_content+3
CheaperGemini 4 Argonhighwins 73%-85%*$1.62Synchronous output stops at 65,536+2CheaperClaude Fable 5.1maxwins 72%-24%$7.63Replace forced tool_choice+5Claude Opus 5.5highwins 75%-70%$1.82No forced tool use+5Gemini 4 Argonhighwins 73%-85%*$1.62Synchronous output stops at 65,536+2Claude Fable 5.1maxwins 72%-24%$7.63Replace forced tool_choice+5Claude Opus 4.6highwins 71%-62%$5 / $25Claude Opus 5maxwins 70%-62%$5.86GPT-6 Lunamaxwins 52%-99%$0.068Function calling only with none · Chat Completions+3GPT-5.6 Lunaxhighwins 57%-98%$0.085GPT-5.6 Terraxhighwins 59%-83%$0.63Prompts with >272K input tokensGPT-6.1 Solmaxwins 61%-85%$0.72Remove unsupported parameters+5GPT-6 Solmaxwins 54%-85%$1.04MiMo v2.6 ProunstatedOpenwins 67%-98%$0.43 / $0.87Pass back reasoning_content+3
GLM 5.2maxOpenwins 66%-92%$1.28No image inputGLM 5.3maxOpenwins 66%-92%$2.01No image input+4
Kimi K3maxOpenwins 65%-77%$2.00Sampling parameters are fixed+3GLM 5.1unstatedOpenwins 65%-92%$1.40 / $4.40No image inputGPT-5.5highwins 65%—$1.40Prompts with >272K input tokensGPT-5.6 Solxhighwins 64%—$1.18GPT-5.4highwins 63%—$2.50 / $15GPT-5.1highwins 61%—$1.25 / $10GPT-6.1 Solmaxwins 61%—$0.72Remove unsupported parameters+5GPT-6 Astramaxwins 60%—$3.26Monitoring can return HTTP 403+2GPT-5.6 Terraxhighwins 59%—$0.63Prompts with >272K input tokensGPT-5.6 Lunaxhighwins 57%—$0.085All OpenAI models →History
3 versionsBenchmarks
in Writing & LanguageFAQ
How much does o1 cost?›
$15 per 1M input tokens and $60 per 1M output tokens; cached input $7.50 per 1M.
Is o1 free to use?›
There is no free API; the cheapest paid price is $15 per 1M input tokens.
How good is o1, and what is it best at?›
#224 of 336 in Chat & Knowledge, #117 of 239 in Coding, #100 of 242 in Agents & Tool Use, #98 of 197 in Writing & Language, #69 of 88 in Vision & Documents. Strongest at: Instructions.
Is o1 better than Qwen 3.5 35B A3B?›
On Arena Text · creative writing · October 22, 2026, o1 scores 1,347.2 vs 1,347.4 — about the same.
How can I use o1?›
Through the API of OpenAI.
What is the context window of o1?›
200K tokens, with up to 100K output tokens.
When was o1 released? Is there a newer version?›
Released 2024-12-05. It has been superseded by o3.
Is o1 open source?›
No, o1 is a closed model available through an API. The closest open-weights option here is MiMo v2.6 Pro.
Can o1 read images?›
It accepts text and images, PDF files as input.
What is o1?›
o1 is a closed language model from OpenAI, released Dec 2024.
What are the best alternatives to o1?›
Claude Opus 5.5 (cheaper), GPT-6 Luna (better), MiMo v2.6 Pro (open weights).