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Models Beginner Also known as: Modello di ragionamento · Thinking model

Reasoning model

A model trained to reason at length before answering, generating intermediate steps (even minutes of 'thinking') for hard math, code, or analysis problems.

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In practice

Examples: OpenAI's o1 and o3, Claude with extended thinking, DeepSeek-R1. They cost much more and are slower, so use them only where you really need them. For plain chat a standard model is enough and cheaper.

Related terms

Chain-of-thought Inference compute

Seen in the wild

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