We’re cutting the price of o3 by 80% and introducing o3-pro in the API, which uses even more compute. o3: Input: $2 / 1M tokens Output: $8 / 1M tokens Now in effect. We optimized our inference stack that serves o3. Same exact model—just cheaper.

o3-pro: Input: $20 / 1M tokens Output: $80 / 1M tokens (87% cheaper than o1-pro!) We recommend using background mode with o3-pro: long-running tasks will be kicked off asynchronously, preventing timeouts.