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Claude Platform Release Notes: Dreams (research preview) now supports Claude Fable 5 and Claude Sonnet 5.

Claude Platform Release Notes · article · Jul 10, 2026 · UTC

Dreams (research preview) now supports Claude Fable 5 and Claude Sonnet 5. See Supported models. We've expanded the Access Transparency documentation of cmek_preserve events with a filter example, an example event payload, and two preservation reason codes (policy_violation_investigation, csae_report). The documentation now also clarifies that a preservation event is written whether the preservation was initiated by a human reviewer or an automated safety pipeline. See CMEK content preservation.

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recordType

page-entry

evidenceStatus

publisher-reported

region

Global