1
Gain API Access
Reach tier 5 usage tier in the OpenAI API to access the o1 model.
2
Select the Model
Choose o1 or o1-mini from the model picker in ChatGPT (for Plus/Team users) or via the API.
3
Use Chat Completions Endpoint
Access o1 through the v1/chat/completions API endpoint.
4
Implement Function Calling or Structured Outputs
Configure function calling to connect to external data and APIs, or use Structured Outputs for JSON Schema compliance.
5
Monitor Rate Limits
Be aware of weekly message limits (30 for o1-preview, 50 for o1-mini) at launch.