How many projects is running on it?

ChatGPT 说：

As of early 2025, LangChain has become a widely adopted framework for building applications powered by large language models (LLMs). While there isn't an exact count of all projects utilizing LangChain, available data provides insight into its extensive usage:

• Over 100,000 applications have been built using LangChain's framework.
• The LangChain Python package receives more than 20 million monthly downloads. LangChain
• The framework boasts a vibrant open-source community with over 4,000 contributors and more than 100,000 GitHub stars, indicating significant developer engagement. LangChain

These figures underscore LangChain's prominence in the LLM application development space, reflecting its widespread adoption across various industries and use cases.

If you're interested in exploring specific projects built with LangChain or seeking inspiration for your own applications, feel free to ask!

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您说：

Is it free for the 100,000applications?

ChatGPT 说：

Yes, LangChain is free and open source under the MIT license, which means anyone can use, modify, and distribute it without cost. This core framework is widely adopted in the AI community for building applications powered by large language models (LLMs) .

However, while the LangChain framework itself is free, there are associated services and tools that may incur costs:

1. Model Usage Costs: When you integrate LangChain with third-party LLM providers like OpenAI, Anthropic, or Cohere, you'll be subject to their respective pricing models. For instance, using OpenAI's GPT-4 model involves costs based on the number of tokens processed .
2. LangChain's Commercial Tools: LangChain Inc. offers additional tools such as LangSmith and LangGraph Platform, which provide enhanced features for developing and managing LLM applications. These tools have their own pricing structures:docs.smith.langchain.com+6LangChain+6LangChain+6 LangSmith: Developer Plan: Free for individual users, including up to 5,000 traces per month. Beyond this, it's $0.50 per 1,000 additional traces. Plus Plan: $39 per user per month, offering up to 10,000 traces monthly and additional team features. Enterprise Plan: Custom pricing tailored to organizational needs, including options for self-hosting and dedicated support . LangGraph Platform: Developer Plan: Free with a limit of 1 million nodes executed per year, suitable for self-hosted deployments. Plus Plan: Currently free during its beta phase, with plans to introduce pricing based on usage in the future. Enterprise Plan: Custom pricing for large-scale deployments, offering advanced features and support .

In summary, while the LangChain framework is free and open source, building applications with it may involve costs related to LLM usage and optional premium tools offered by LangChain Inc.

If you're interested, I can provide examples of how to set up a free LangChain project using open-source models or guide you through the pricing details of specific services.

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