To be precise - I don't think I'm saying 'local LLMs' above :) But technically possible, I guess, just hasn't been part of what's officially available. (There are also licensing issues still.) To answer your question about the APIs - the Agent itself queries OpenAI via REST to break the prompt down into tasks, then works with the underlying tools/pipelines using Python API (and then, e.g., a Transformer model that's part of the pipeline has to be 'loaded' into a GPU). Part of those pipelines might be using Promptnode (that can work with hosted LLMs via REST, but could also work with a local LLM). Re 'subsume' - well, that depends :) But arguably, you can build an NLP Python backend with Haystack only, of course.. Regardless of how complex your underlying use case is, or whether it's extractive, generative or both.