What is a ReAct-style agent? (opens in new tab)

TL;DR: "ReAct" is the way all models do their internal "reasoning+acting" loop since 2023. prompt => {loop = evaluate tool call(s)} => final answer It used to be dumber, before a paper from Google. Disclaimer: this article is a reviewed, lightly edited and enriched conversation with Claude Opus 4.8. I was learning the subject and found the answer worth sharing. I'm not taking any credit: It helped me, hopefully it'll help you. A ReAct-style agent is an LLM agent that interleaves reasoning...