Philipp Schmid • 3/31/2025

ReAct agent from scratch with Gemini 2.5 and LangGraph

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This technical article provides a detailed guide to creating a ReAct (Reasoning and Acting) AI agent using Google's Gemini 2.5 Pro or 2.0 Flash models with LangGraph. It explains the ReAct pattern, its evolution from simple prompting, and demonstrates how to build an agent capable of iterative reasoning, tool execution, and observation to solve complex, multi-step problems programmatically.

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#React #llm #AI Agents
ReAct agent from scratch with Gemini 2.5 and LangGraph

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