OpenAI: o3-pro API
The elite model in OpenAI's reasoning series, engineered for professional tasks where precision is more critical than speed. o3-pro leverages massive reasoning compute to provide unparalleled reliability in complex math proofs, scientific discovery, deep logic architecture, and high-stakes coding.
- Context window: 200,000 tokens
- Max output: 100,000 tokens
- Input: text, image
- Output: text
- Reasoning: Supported
- Tool calling: Supported
- File input: Supported
- Released: 2025-06-10
- Knowledge cutoff: 2024-04-30
Frequently Asked Questions
What is the context window of o3-pro?
o3-pro supports a context window of up to 200,000 tokens.
Does o3-pro support function calling?
Yes. o3-pro supports tool / function calling.
Does o3-pro support reasoning?
Yes. o3-pro is a reasoning-capable model.
What is the knowledge cutoff of o3-pro?
The knowledge cutoff of o3-pro is 2024-04-30.