Add Groq LLM integration (or ability to create custom LLM models)

[arek-e]

Is your feature request related to a problem? Please describe.
I have used the python Langchain library in a previous project for a Django backend. Now Im working on a new project that uses Tauri and its rust backend so naturally i was looking for implementation for Langchain in rust. In python I started using the Groq chat model, I really liked its simple price model and fast inference so naturally i would want to use it in this project as well but currently there is no support for this.

Describe the solution you'd like
I would like an integration for the llm Groq model for langchain-rust like OpenAI,Claude and Ollama is supported. Currently there are some unnoffical sdk for Groq like groq-api-rust or groq-rust

Describe alternatives you've considered
The other alternative and more scalable solution for similar issues would be the ability to create a custom chat model similarly to how the python SDK works by wrapping the llm with the BaseChatModel.

https://python.langchain.com/docs/how_to/custom_chat_model/

[prabirshrestha]

Seems like Groq supports OpenAI compatibility based on their docs. Would this be enough?

[dredozubov]

@arek-e I'm pretty sure I'll need Groq compatibility, too. Have you managed to make it work for you?