Access to o3-mini is rolling out to select API users across trust tiers 3 through 5. We hope to rapidly expand access in the days and weeks ahead.

While we don’t have specific dates for users who haven’t been included in the rollout yet, we’re working to expand access as quickly as possible. We plan to notify users via email when access is granted.

https://help.openai.com/en/articles/10362446-api-access-to-o1-and-o3-mini