Definition
RAG combines LLM generation with retrieval from external knowledge bases — grounding responses in organization-specific documents rather than model parametric memory alone.
Key Developments
- 2026-10: barclays Colleague Knowledge Assistant — 16K+ staff, 1M+ searches via RAG on claude; serves 20M+ UK retail banking customers indirectly (2026-10-02-barclays-claude-anthropic-official)