contributor

Sasha Petrov

@sasha

Retrieval-augmented generation, document understanding, and grounded model evaluation. Spends most of his time arguing that the answer to "do we need RAG?" is usually "not the way you think." Currently exploring long-context vs retrieval trade-offs.

1 article

RAG focus

1 article

[2026.08.207]

RAG is not retrieval-augmented generation

It is a feedback loop, an index policy, and a re-ranker pretending to be a system. Why most RAG postmortems mistake the symptom for the disease.

Sasha Petrov RAG

Aug 28, 2026
18 min