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LangChain

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Framework for building LLM-powered applications

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About LangChain

LangChain is the most popular framework for building AI agents, RAG pipelines, and LLM-powered applications. Available for Python and JavaScript with 100+ integrations.

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Hugging Face

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Freemium

The GitHub of AI — 500,000+ open-source models

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Anthropic API

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Claude API — safe, fast, and powerful language models

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OpenAI API

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The most widely used AI API — GPT-4o, embeddings, and more

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