Comment by BeetleB

> They seem mostly useless in a sufficiently large codebase especially when they are messy and interactions aren't always obvious.

What type of documents do you have explaining the codebase and its messy interactions, and have you provided that to the LLM?

Also, have you tried giving someone brand new to the team the exact same task and information you gave to the LLM, and how effective were they compared to the LLM?

> I don't know how much better Claude is than ChatGPT, but I can't get ChatGPT to do much useful with an existing large codebase.

As others have pointed out, from your comment, it doesn't sound like you've used a tool dedicated for AI coding.

(But even if you had, it would still fail if you expect LLMs to do stuff without sufficient context).