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overview changedrelease-notes/overview

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9393### October 1, 2026
9494 
9595* We’ve added a `line` field to the [Models API](https://platform.claude.com/docs/en/api/models/list). `GET /v1/models` and `GET /v1/models/{model_id}` now return the model line each model belongs to. Claude Opus 4.5 and Claude Opus 4.6 both report `opus`, for example. Use `line` to group models without parsing their IDs. `line` is `null` for a model that belongs to no line. See [Using the Models API](https://platform.claude.com/docs/en/models/overview#using-the-models-api).
96* [Dreams](https://platform.claude.com/docs/en/managed-agents/dreams) (research preview) now supports Claude Opus 5.5, Claude Fable 5.1, and Claude Sonnet 5.5. See [Supported models](https://platform.claude.com/docs/en/managed-agents/dreams#limits).
96* [Dreams](https://platform.claude.com/docs/en/managed-agents/dreams) (research preview) now supports Claude Opus 5.5, Claude Fable 5.1, and Claude Sonnet 5.5. See [Supported models](https://platform.claude.com/docs/en/managed-agents/dreams#feature-availability).
9797 
9898### September 30, 2026
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220220 
221221### August 1, 2026
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223* [Dreams](https://platform.claude.com/docs/en/managed-agents/dreams) (research preview) now supports Claude Opus 5. See [Supported models](https://platform.claude.com/docs/en/managed-agents/dreams#limits).
223* [Dreams](https://platform.claude.com/docs/en/managed-agents/dreams) (research preview) now supports Claude Opus 5. See [Supported models](https://platform.claude.com/docs/en/managed-agents/dreams#feature-availability).
224224 
225225### July 24, 2026
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254254 
255255### July 10, 2026
256256 
257* [Dreams](https://platform.claude.com/docs/en/managed-agents/dreams) (research preview) now supports Claude Fable 5 and Claude Sonnet 5. See [Supported models](https://platform.claude.com/docs/en/managed-agents/dreams#limits).
257* [Dreams](https://platform.claude.com/docs/en/managed-agents/dreams) (research preview) now supports Claude Fable 5 and Claude Sonnet 5. See [Supported models](https://platform.claude.com/docs/en/managed-agents/dreams#feature-availability).
258258* We’ve expanded the [Access Transparency](https://platform.claude.com/docs/en/manage-claude/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](https://platform.claude.com/docs/en/manage-claude/access-transparency#cmek-content-preservation).
259259 
260260### July 8, 2026
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