I am looking for any way (including code) to access the knowledge base with Claude LLM and not GPT, does that possible?

Have you tried Langchain?

Not sure how it can help?

It works pretty much like the KB in Botpress does. Have you used it before?

Never, do you recommend?

You could try it, and see if it works for you

You would need to set the Knowledge in another service like Langchain or StackAI which can use any LLM provider, then you would make API requests to that service inside a Botpress code and then get the Knowledge answer back