Really like your writeup! I work on LangChain and would love to set up some time to chat if you're game. My email is in my profile

Howdy! Erick from LangChain here. If anyone is seeing version conflicts on particular packages, please let me know!

These usually stem from overly strict constraints in the underlying sdks for the integrations, and in general we've been pretty successful asking for those constraints to be loosened. The main "problem" constraint we've seen in the past has been on httpx. Curious if you've seen others!

Howdy Erick from LangChain here! Just a quick clarification that LangSmith is designed to work great for folks not using LangChain as well :)

Check out our quickstart for an example of what that looks like! https://docs.smith.langchain.com/

TIL! LangSmith is great.

Erick from LangChain here - would recommend either deploying with LangGraph Cloud or anywhere that deploys a FastAPI easily.

LangGraph Cloud: https://langchain-ai.github.io/langgraph/cloud/ Example (chat-langchain): https://github.com/langchain-ai/chat-langchain?tab=readme-ov...

FastAPI example with LangServe (old chat-langchain implementation): https://github.com/langchain-ai/chat-langchain/blob/langserv...

Or just use regular fastapi endpoints instead of langserve.add_routes with a fastapi server: https://fastapi.tiangolo.com/

Would recommend using the updated guide here! That link is from the v0.1 docs. https://python.langchain.com/v0.2/docs/how_to/structured_out...

OOC which openai model were you using? Would recommend trying 4o as well as Anthropic claude 3.5 sonnet if ya haven't played around with those yet

Thanks.

I was using gpt-3.5-turbo-0125. It was before the recent pricing change.

But I have a bunch of updates to make to the json schema, so will re-run everything with gpt-4o-mini.

Sonnet seems a lot more expensive, but I'll 'upgrade' if the schema changes don't get sufficiently good results.

Nice. Could also give haiku a try!

Howdy! Erick from LangChain here. Would love to learn a bit more about your bug hunting process and see how we can improve the debugging process for everyone else! Could you email me at erick@langchain.dev?

Erick, please just read this entire thread.

Kept searching for an “April fools” with a 4/1 publication date to no avail

My first thought as well. But unless they have went too overboard and published a nature paper[1] just for fun, it seems legit.

[1]: https://www.nature.com/articles/s41467-024-47073-2