OpenAI requires bringing your own API key to use o3-pro over the API. Set up here: https://openrouter.ai/settings/integrations

OpenAI: o3 Pro

openai/o3-pro

Created Jun 10, 2025200,000 context
$20/M input tokens$80/M output tokens$15.30/K input imgs

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

Providers for o3 Pro

OpenRouter routes requests to the best providers that are able to handle your prompt size and parameters, with fallbacks to maximize uptime.

    OpenAI: o3 Pro – Provider Status | OpenRouter