Best approach for RAG testing with LangChain

[simonfreeman80]

I would like to use ChainForge to test several LLM model against some RAG documents (PDF>text>chunk>vector embedding>feeding in prompt).
Hello, I'm just wondering what could be best approach for testing ie: is there any easy way to do it using Python Evaluator Node? Thx

[ianarawjo]

If you want to test LLM providers against custom models/chains, then I would suggest creating a Custom Provider as a Python function: https://chainforge.ai/docs/custom_providers/