langchain4j/langchain4j

langchain4j

✅ Recently maintained

LangChain4j is an idiomatic, open-source Java library for building LLM-powered applications on the JVM. It offers a unified API over popular LLM providers and vector stores, and makes implementing tool calling (including MCP support), agents and RAG easy. It integrates seamlessly with enterprise Java frameworks like Quarkus and Spring Boot.

13,347Stars
2,657Forks
+427-day stars

Java · Apache-2.0 · Last push 2026-11-02

Official repository & installation ↗
huggingfacejavalangchainopenaichatgptgptllamamilvuspineconeonnx

GitValue · Value evidence

Unscored · Evidence coverage 0%

Provisional rubric; documentation and runtime testing are separate. Missing evidence does not imply low value.

Star history

2025-09-292026-11-03
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2026-10-0513,176
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2026-11-0113,337
2026-11-0213,344
2026-11-0313,347

Get the project

git clone https://github.com/langchain4j/langchain4j.git

Cloning downloads the source. For dependencies and installation, follow the project README.

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