Op
o3 Pro
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.
- Input
- text
- image
- Output
- text
Providers
Available through 1 free provider. Use the model ID and API settings below to connect.
Vercel AI Gateway
VAVercel AI Gateway
* The provider match may differ from this model. Check its docs for details.
Benchmarks
Compare scores and explore results by category.
No benchmark results are available for this model yet.
Frequently asked questions
Free access, setup, and what to expect.
Free API access for o3 Pro is listed through Vercel AI Gateway, but a specific request or token allowance isn’t available in the listed data. Check the o3 Pro provider pricing and rate limits for what’s included and any account requirements.
To use o3 Pro, choose one of the listed o3 Pro API providers and follow the provider’s account and API-key setup guide. Copy the o3 Pro model ID and connection settings for your chosen provider into your app or API client. Model IDs can differ between providers. API requests go directly to the provider; Free Models is a comparison site.
o3 Pro accepts text, image, and pdf as listed input formats. Listed output formats include text. Image or audio input support does not imply image or audio generation. Check the chosen provider’s o3 Pro documentation for supported file types and request formats.
o3 Pro has a listed context window of 200K tokens. Tokens are small pieces of content rather than a word count. Instructions, conversation history, and other inputs use context space, and the response also needs room. The maximum output length for o3 Pro may be smaller than the context window and can vary by provider.
o3 Pro has both reasoning and tool calling listed as supported capabilities. Reasoning enables additional processing for complex problems. Tool calling allows a model to request functions that your app executes. Check the chosen provider’s documentation for capability availability and setup.
No benchmark results are listed for o3 Pro yet. Missing scores don’t establish poor performance. Compare scores within the same benchmark: coding indexes, Elo ratings, and win rates measure different things. The index comparison charts include only scored free models listed on Free Models. Evaluate o3 Pro on examples from your own task alongside context size and provider limits.