I think the key quote is:
>"Claude's extensive context window has also transformed their approach to handling large codebases. When the 200K context window was released, Hedley notes they "ripped out the entire RAG and just put it in the context window instead and it went from 60 percent accuracy to 98."
RAG = Retrieval Augmented Generation
Related:
What is retrieval-augmented generation, and what does it do for generative AI?:
https://github.blog/ai-and-ml/generative-ai/what-is-retrieva...
Retrieval Augmented Generation:
https://en.wikipedia.org/wiki/Retrieval-augmented_generation
Retrieval-Augmented Generation for Knowledge-Intensive NLP Tasks (2021) (apparently the original paper where the term 'RAG' was coined):