Copilot Studio environments can expose different model options depending on region, licensing, and tenant configuration. Teams should use tenant-approved models and review current Microsoft documentation before rollout.
Claude is particularly favored for 'Deep Context' RAG because of its massive context window — Opus 4.7 introduced 200K–1M tokens (beta), and Opus 4.8 now delivers 1M tokens as standard with improved coding accuracy. Claude's record-breaking performance in Needle In A Haystack retrieval tests — 98.5% visual acuity benchmark — makes it ideal for enterprise use. When an agent needs to analyze a 1,000-page regulatory manual, Claude Opus 4.8 is now the preferred reasoning engine.