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Claude Opus 4.6 and the compaction API

calendar_today February 5, 2026 person domain anthropic

Opus 4.6 is our most intelligent model for complex agentic tasks and long-horizon work, introducing adaptive thinking and a server-side compaction API for effectively infinite conversations. This release also brings data residency controls (US-only inference at 1.1x pricing) and 1M token context windows in beta for Opus 4.6.

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