Key Metrics
Input Limit
200K tokens
Output Limit
100K tokens
Input Cost
$150.00/1M
Output Cost
$600.00/1M
Sample API Code
Required Libraries
Notes
The o1 series of models are trained with reinforcement learning to think before they answer and perform complex reasoning. The o1-pro model uses more compute to think harder and provide consistently better answers. o1-pro is available in the Responses API only to enable support for multi-turn model interactions before responding to API requests, and other advanced API features in the future.
Capabilities
Reasoning token support
Function calling
Structured outputs
Text input
Image input
Text output
Complex reasoning
No streaming support
No fine-tuning support
No distillation support
No predicted outputs support
Responses API only access
Supported Data Types
Input Types
Text
image
Output Types
Text
Strengths & Weaknesses
Exceptional at
Reasoning
Poor at
Speed (Slowest)
Additional Information
Latest Update
Mar 19, 2025
Knowledge Cutoff
Oct 01, 2023