1
Access via ChatGPT
Use ChatGPT Plus, Team, or Pro subscriptions and select the o3 model in the model picker.
2
Use API
Integrate using Chat Completions or Responses API; verify your organization if required.
3
Explore Documentation
Review official docs for features like function calling and tool integrations.
4
Test in Playground
Try the o-series models in the OpenAI playground demo to evaluate capabilities.