Adaptive Thinking
Adaptive thinking is how Claude automatically decides how much reasoning effort to apply to a given question. Simple questions get fast, direct answers. Complex or ambiguous questions trigger more deliberate internal reasoning before a response. You don't have to configure this — Claude adjusts on its own. The practical result is that you get appropriate depth without having to manually switch modes or prompt for step-by-step reasoning.
In practice
You ask Claude a quick factual question and it answers in one sentence. You ask it to help you think through a tricky hiring decision and it slows down, considers multiple angles, and walks you through its reasoning. You didn't change anything — Claude calibrated the depth on its own.
Related concepts