ChunkHound does it a bit differently, since at true enterprise scale it's very slow and costly to pass all code chunks through an LLM during indexing time. Instead, ChunkHound implements a customized "deep research" algorithm that's been optimized for code exploration so it can answer, on demand, any deep technical question about the indexed codebase. This research agent can be powered by a lower tier LLM (think Haiku, Codex low, etc) that's already included in your subscription.