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)
Modalities
Input Price
$20per 1M
Output Price
$80per 1M
Context
200K
Weekly Tokens
8.34M
Released
Jun 10, 2025