o1 Pro
Mar 2025
o1 ProCompare inon
Benchmarks of o1 Pro2
BenchmarkByScoreRank
Overall1
Math1
No benchmark matches
Rankingin thinking mode?
Retired models are left out of the current rankings.
Alternatives?
ModelScoreCostPer taskWhat changes
CheaperClaude Opus 5.5max×4.6-97%$5.98No forced tool use+5BetterGPT-6 Lunalow+73%-100%$0.005Function calling only with none · Chat Completions+3
OpenMiMo v2.6 Prothinking×3.7-100%$0.13Pass back reasoning_content+3CheaperClaude Sonnet 5.5max×4.5-98%$5.46No forced tool use+5CheaperClaude Fable 5.1max×4.3-92%$7.63Replace forced tool_choice+5ModelScoreCostPer taskWhat changes
Claude Opus 5.5max×4.6-97%$5.98No forced tool use+5Claude Sonnet 5.5max×4.5-98%$5.46No forced tool use+5Claude Fable 5.1max×4.3-92%$7.63Replace forced tool_choice+5GPT-6 Astramax×4.2-92%$3.26Monitoring can return HTTP 403+2
Gemini 4 Argonhigh×4.2-98%*$1.99Synchronous output stops at 65,536+2ModelScoreCostPer taskWhat changes
GPT-6 Lunalow+73%-100%$0.005Function calling only with none · Chat Completions+3GPT-5.6 Lunalow+69%-100%$0.01MiMo v2.5thinkingOpen+76%-100%$0.019Claude Haiku 5.5low×2.4-100%$0.024Remove sampling parameters+5GPT-5 Minihigh+35%-100%$0.053ModelScoreCostPer taskWhat changes
MiMo v2.6 ProthinkingOpen×3.7-100%$0.13Pass back reasoning_content+3
DeepSeek V4.1 Flash 1017maxOpen×3.6-100%$0.26Pass back reasoning_content · Chat Completions+4
GLM 5.3maxOpen×3.6-99%$2.01No image input+4
Step 5 PreviewthinkingOpen×3.5-99%$1.03web_search not available · Chat Completions+2
Kimi K3maxOpen×3.5-98%$2.00Sampling parameters are fixed+3ModelScoreCostPer taskWhat changes
GPT-6 Astramedium×4—$1.54Monitoring can return HTTP 403+2GPT-6.1 Solmedium×3.8—$0.21Remove unsupported parameters+5GPT-6 Solmedium×3.2—$0.25GPT-5.6 Solmedium×3.2—$0.50GPT-5.5medium×2.7—$0.90Prompts with >272K input tokensGPT-5.3 Codexxhigh×2.6—$1.75 / $14DeprecatedGPT-5.6 Terramedium×2.4—$0.18Prompts with >272K input tokensGPT-6 Lunamedium×2.4—$0.017Function calling only with none · Chat Completions+3All OpenAI models →History
2 versionsFAQ
How much does o1 Pro cost?›
$150 per 1M input tokens and $600 per 1M output tokens.
Is o1 Pro free to use?›
There is no free API; the cheapest paid price is $150 per 1M input tokens.
How can I use o1 Pro?›
Through the API of OpenAI.
What is the context window of o1 Pro?›
200K tokens, with up to 100K output tokens.
When was o1 Pro released? Is there a newer version?›
Released 2025-03-19. It has been superseded by GPT-5.6 Sol.
Is o1 Pro open source?›
No, o1 Pro is a closed model available through an API. The closest open-weights option here is MiMo v2.6 Pro.
Can o1 Pro read images?›
It accepts text and images, PDF files as input.
What is o1 Pro?›
o1 Pro is a closed language model from OpenAI, released Mar 2025.
What are the best alternatives to o1 Pro?›
Claude Opus 5.5 (cheaper), GPT-6 Luna (better), MiMo v2.6 Pro (open weights).