OpenAI: o3 Pro

openai/o3-pro

Released Jun 10, 2025Knowledge cutoff Jun 30, 2024200,000 context$20/M input tokens$80/M output tokens

The o-series of models are trained with reinforcement learning to think before they answer and perform complex reasoning. The o3-pro model uses more compute to think harder and provide consistently better answers.

Note that BYOK is required for this model. Set up here: https://openrouter.ai/settings/integrations(opens in new tab)

OpenAI: o3 Pro

openai/o3-pro

Released Jun 10, 2025Knowledge cutoff Jun 30, 2024200,000 context$20/M input tokens$80/M output tokens

The o-series of models are trained with reinforcement learning to think before they answer and perform complex reasoning. The o3-pro model uses more compute to think harder and provide consistently better answers.

Note that BYOK is required for this model. Set up here: https://openrouter.ai/settings/integrations(opens in new tab)

Sample code and API for o3 Pro

OpenRouter normalizes requests and responses across providers for you.

OpenRouter provides an OpenAI-compatible completion API to 300+ models & providers that you can call directly, or using the OpenAI SDK. Additionally, some third-party SDKs are available.

In the examples below, the OpenRouter-specific headers are optional. Setting them allows your app to appear on the OpenRouter leaderboards.

Using third-party SDKs

For information about using third-party SDKs and frameworks with OpenRouter, please see our frameworks documentation.