Claude 5.5 Haiku
Text by Anthropic
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When enabled, the model uses adaptive thinking to decide when and how much to think before responding, and at lower effort it can skip thinking on simple requests. Adaptive thinking is on by default. Turning it off answers without thinking.
Controls thinking depth, latency, and cost. The default is Medium. Higher effort improves quality but uses more tokens and is slower. Recommended: Low for classification, routing and extraction, Medium for general use, High or above for harder tasks. Only applies when Reasoning is enabled.
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