Glossary changedglossary
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141141### Effort level
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143A setting that controls adaptive reasoning, which lets the model decide whether and how much to think on each step. Higher effort means more thinking tokens and deeper reasoning; lower effort is faster and cheaper. Effort is supported on Fable models, on Opus 4.6 and later, and on Sonnet 4.6 and later.
143A setting that controls adaptive reasoning, which lets the model decide whether and how much to think on each step. Higher effort means more thinking tokens and deeper reasoning; lower effort is faster and cheaper. Effort is supported on Fable models, on Opus 4.6 and later, on Sonnet 4.6 and later, and on Haiku 5.5.
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145145Learn more: [Adjust effort level](/docs/en/model-config#adjust-effort-level)
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