ReAct: Reasoning + Action = More Reliable Agent
Comparison Demo: ReAct vs Pure Thinking (CoT) vs Action-only
Three-way Comparison
ReAct Detail
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What is the elevation range of the eastern region reached by the Colorado orogeny?
Multi-hop QA — requires multiple retrieval steps to answer
ReAct (Reasoning + Action)
Pure CoT (Thinking Only)
Act-only (Action Only)
ReAct
Correct
1,800 ~ 7,000 ft
Pure CoT
Hallucination
Fabricated non-existent data
Act-only
Inefficient
Required 5 searches, wasted Tokens