OpenAI o1-mini is a small, faster, and more affordable o-series reasoning model. It is text-only and supports a 128,000-token input context with 65,536 output tokens, exposing streaming and reasoning tokens across Chat Completions, Responses, Batch, Fine-tuning, and Assistants APIs. Note that o1-mini does not support function calling, structured outputs, or predicted outputs — OpenAI recommends o3-mini for higher intelligence at comparable latency and cost.
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