OpenAI: o3 Pro
OpenAI's o3 Pro is a premium reasoning model with strong benchmark scores, vision support, tool use, and a 200K context window — designed for the most demanding analytical and technical tasks. Its high price ($20/1M input) reflects its positioning as a top-tier offering, and it meets the intelligence threshold for top-tier classification, though its cost limits value-for-money appeal.
Assessment date: March 14, 2026
Our methodology takes into account a range of factors including pricing, functionality, capabilities, benchmark performance, and real-world applicability. Rankings are reviewed and updated regularly as new models are released. Issues with our rankings? Contact us
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
Capabilities
Architecture
| Modality | Text + Image + File → Text |
| Tokenizer | GPT |
Benchmark Scores
Evaluations
Benchmark data from Artificial Analysis and Hugging Face
Model Information
Pricing
| Token Type | Cost per 1M tokens | Cost per 1K tokens |
|---|---|---|
| Input | $20.00 | $0.020000 |
| Output | $80.00 | $0.080000 |
