LangChain 推出 ModelRouterMiddleware：按首条消息自动选模型
LangChain 出了个 ModelRouterMiddleware，读你第一条消息就自动挑模型，还能每次工具返回后换模型，15分钟就能搭出来。
LangChain 的 ModelRouterMiddleware 借助 Jev 读取对话的第一条消息，据此挑选合适的模型，并由该模型完成整个运行流程。Jev 成本足够低，开发者还能在每次工具调用结果返回后通过自定义 hook 重新选模型。Drew Breunig 用 DSPy 和 Jev 做了一个模型路由示例，约 15 分钟搭建完成。文档已发布在 docs.langchain.com。
cool project by @dbreunig in langchain this is ModelRouterMiddleware - jev reads the first message, picks the model, and that model handles the whole run jev is cheap enough that you can also re-pick after each tool result with a custom hook docs: docs.langchain.com/oss/python/int… x.com/dbreunig/statu… Drew Breunig @dbreunig A quick example of a model router, using DSPy and Jev, based on your initial prompt. Sketched this out in ~15 min, by request, and am surprised at how well it works! gist.github.com/dbreunig/949b4… 🔗 View Quoted Tweet 💬 4 🔄 1 ❤️ 8 👀 764 📊 4 ⚡
