o3 Pro
Jun 2025
o3 ProCompare inon
Benchmarks of o3 Pro9
BenchmarkByScoreRank
Overall1
Reasoning4
Agents2
Legacy · saturated or no longer reported2
No benchmark matches
Rankingat high effort?
Strong at
Alternatives?
ModelScoreCostPer taskWhat changes
CheaperGPT-6 Astramax×19.5-43%$3.26Monitoring can return HTTP 403+2BetterGPT-5.6 Lunamedium+51%-99%$0.016
OpenGLM 5.3 Flashmax×13.5-99%$0.28Defaults to max · Self-hosted+4CheaperGPT-6.1 Solmax×19.4-89%$0.72Remove unsupported parameters+5
CheaperClaude Opus 5.5high×19.2-77%$1.82No forced tool use+5ModelScoreCostPer taskWhat changes
GPT-6 Astramax×19.5-43%$3.26Monitoring can return HTTP 403+2GPT-6.1 Solmax×19.4-89%$0.72Remove unsupported parameters+5Claude Opus 5.5high×19.2-77%$1.82No forced tool use+5GPT-5.6 Solmax×19-77%$1.99
Gemini 4 Argonhigh×18.8-89%*$1.99Synchronous output stops at 65,536+2ModelScoreCostPer taskWhat changes
GPT-5.6 Lunamedium+51%-99%$0.016GPT-6 Lunamedium×3.7-99%$0.017Function calling only with none · Chat Completions+3Claude Haiku 5.5medium+94%-99%$0.047Remove sampling parameters+5GPT-6.1 Sollow×15.8-89%$0.13Remove unsupported parameters+5GPT-6 Sollow×6.5-89%$0.13ModelScoreCostPer taskWhat changes
GLM 5.3 FlashmaxOpen×13.5-99%$0.28Defaults to max · Self-hosted+4
DeepSeek V4 Pro 0813maxOpen×12.6-94%$0.67No image input+5
Kimi K3maxOpen×12.4-83%$2.00Sampling parameters are fixed+3
Qwen3.8 27BxhighOpen×8.7-97%$1.01max_tokens range · QwenCloud+4TInkling SmallxhighOpen×8.3-98%$0.45 / $1.20No strict JSONModelScoreCostPer taskWhat changes
GPT-6 Astrahigh×18.9—$1.73Monitoring can return HTTP 403+2GPT-6.1 Solhigh×18.9—$0.32Remove unsupported parameters+5GPT-5.6 Solhigh×17.6—$0.81GPT-5.5 Prohigh×17.4—$30 / $180GPT-5.5high×17.1—$1.54Prompts with >272K input tokensGPT-5.4 Proxhigh×17.1—$30 / $180No strict JSONGPT-6 Solhigh×14.2—$0.37GPT-5.4high×13.9—$2.50 / $15All OpenAI models →Benchmarks
all categoriesCoding
Aider Polyglot · two attempts84.9#2
FAQ
How much does o3 Pro cost?›
$20 per 1M input tokens and $80 per 1M output tokens.
Is o3 Pro free to use?›
There is no free API; the cheapest paid price is $20 per 1M input tokens.
How good is o3 Pro, and what is it best at?›
#105 of 334 in Chat & Knowledge, #2 of 15 in Coding, #15 of 16 in Agents & Tool Use.
Is o3 Pro better than MiniMax M2.5?›
On ARC-AGI-2 · semi-private, o3 Pro scores 4.9 vs 4.9 — about the same.
How can I use o3 Pro?›
Through the API of OpenAI.
What is the context window of o3 Pro?›
200K tokens, with up to 100K output tokens.
When was o3 Pro released? Is there a newer version?›
Released 2025-06-10. It has been superseded by GPT-5.
Is o3 Pro open source?›
No, o3 Pro is a closed model available through an API. The closest open-weights option here is GLM 5.3 Flash.
Can o3 Pro read images?›
It accepts text and images, PDF files as input.
What is o3 Pro?›
o3 Pro is a closed language model from OpenAI, released Jun 2025.
What are the best alternatives to o3 Pro?›
GPT-6 Astra (cheaper), GPT-5.6 Luna (better), GLM 5.3 Flash (open weights).