openai: OpenAI o3 Mini

o3-mini is our newest small reasoning model, providing high intelligence at the same cost and latency targets of o1-mini. o3-mini supports key developer features, like Structured Outputs, function calling, and Batch API. This model supports the `reasoning_effort` parameter, which can be set to 'high', 'medium', or 'low' to control the thinking time of the model.