OpenAI: o3-pro:free
o3-pro:free
200K context100K outReasoningToolsVisionFilesStructured
Released Jun 10, 2025Knowledge cutoff 2024Updated Jun 10, 2025
The elite model in OpenAI's reasoning series, engineered for professional tasks where precision is more critical than speed. o3-pro leverages massive reasoning compute to provide unparalleled reliability in complex math proofs, scientific discovery, deep logic architecture, and high-stakes coding.
Mode responsesTokenizer GPTModerated
All providers for this model are busy right now
Every upstream provider has hit its rate limit. The model comes back automatically once limits lift, usually within hours. Try again in a little while or switch to another model.
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Input price
$0.00/ 1M tokens
Output price
$0.00/ 1M tokens
Context window 200K tokensCompatible endpoints openai-responseVendor OpenAI
Performance
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Usage & Ranking
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Supported parameters
All providers = every upstream serving this model supports it. Some providers = depends on which upstream handles the request. Default = the value sent when you leave the parameter unset.
| Parameter | Providers | Default |
|---|---|---|
| frequency_penalty | Some providers | Not sent by default |
| include_reasoning | All providers | - |
| max_tokens | All providers | - |
| reasoning | All providers | - |
| response_format | All providers | - |
| seed | All providers | - |
| structured_outputs | All providers | - |
| temperature | Some providers | Not sent by default |
| tool_choice | All providers | - |
| tools | All providers | - |
| top_p | Some providers | Not sent by default |
