A way for AI to reason inside without showing every step in words.
It is like a student doing math in their head. You see the answer, not the messy scratch paper.
The AI works through steps inside, then gives the final answer. It suits short questions.
Chain-of-thought
It keeps the middle steps inside instead of writing them out.
Reasoning-model
A Reasoning-model can use it for inner thinking.
Reasoning Transparency
Its hidden steps are harder to inspect.