# ReAct agents explained: concepts & practical uses

DevFeed: [ReAct agents explained: concepts & practical uses](<https://devfeed.tech/articles/react-agents-explained-concepts-practical-uses-4842.md>)

Original publisher: [Read original article](<https://redis.io/blog/react-agents-explained-concepts-practical-uses/>)

Author: Jeff Mills

Published: 2026-08-18T00:00:00Z

Content type: article

Language: en

Sources: [Redis Blog](<https://devfeed.tech/sources/redis-blog.md>)

Topics: [Artificial Intelligence](<https://devfeed.tech/topics/ai.md>), [ai-coding](<https://devfeed.tech/topics/ai-coding.md>), [LangChain](<https://devfeed.tech/topics/langchain.md>), [Iris](<https://devfeed.tech/topics/iris.md>), [Chain-of-thought](<https://devfeed.tech/topics/chain-of-thought.md>), [coding](<https://devfeed.tech/topics/coding.md>), [Error Propagation](<https://devfeed.tech/topics/error-propagation.md>)

Tags: [agent](<https://devfeed.tech/tags/agent.md>), [agents](<https://devfeed.tech/tags/agents.md>), [ai](<https://devfeed.tech/tags/ai.md>), [ai-coding](<https://devfeed.tech/tags/ai-coding.md>), [coding](<https://devfeed.tech/tags/coding.md>), [langchain](<https://devfeed.tech/tags/langchain.md>), [reasoning](<https://devfeed.tech/tags/reasoning.md>), [tech-de](<https://devfeed.tech/tags/tech-de.md>), [tool](<https://devfeed.tech/tags/tool.md>)

## AI overview

A practical guide to ReAct agents: AI systems that alternate between reasoning, tool use, and feedback in a loop. It explains the pattern, compares it with chain-of-thought approaches, and discusses production concerns such as latency, cost, hallucination, and error propagation, with examples involving LangChain, LangGraph, and Redis Iris.

## Source excerpt

If you've watched an AI coding assistant hunt down a bug, run a test, read the failure, and adapt its next fix, you've watched Reasoning and Acting (ReAct)-like behavior at work. ReAct is a common pattern in production agent systems today. It's simple...