reasoning model — A model trained to think — generating extended internal reasoning before answering — trading time and tokens for accuracy on hard problems.
AI agent — An AI system that doesn't just answer once but works toward a goal in a loop — taking actions, reading the results, and deciding what to do next.
Why it matters
Mercury 2 is now one model string away in anything already routing through OpenRouter, which makes an A/B against your current low-latency model cheap to run.
