Architecture of Thinking: Fast and Slow

Paradox: Millisecond response vs. seconds of deep thought.

Three options:

separated responses – fast responds with a placeholder in 500ms, slow thinks for 5–10 seconds and gives a complete answer; risks of overthinking and inconsistency;
fast interacts, slow suggests via status line – GPT-Live, Pine AI, “Think Fast”: fast plan in the foreground, reasoning model in the background, transmission via a compact text channel;
unity of thinking and expression – Step-Audio R1: “think as I speak”, two brains (thought formulation and speech articulation) work in parallel as a pipeline.

The separation of 1–2 does not depend on end-to-end architecture; option 3 embeds thinking into the model.