dreams changedmanaged-agents/dreams
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1111 supportedModels:
1212 - claude-fable-5-1
1313 - claude-fable-5
14 - claude-mythos-preview
1514 - claude-opus-5-5
1615 - claude-opus-5
1716 - claude-sonnet-5-5
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3534
3635The input store is never modified, so you can review the output and discard it if you don’t like the result.
3736
38<Note>
39 Dream endpoints are gated by the `dreaming-2026-04-21` beta header; the `managed-agents-2026-04-01` header on its own doesn’t grant access to dreams. The dream-endpoint examples on this page send both headers; session and memory-store calls need only `managed-agents-2026-04-01`. The SDK sets these automatically.
40</Note>
41
4237## How it works
4338
4439A **dream** is an asynchronous job that takes:
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171166 ```
172167</CodeGroup>
173168
174Dreaming inputs include the pre-existing memory store and an array of sessions. The selected model runs the dreaming pipeline. During the research preview, `claude-opus-5-5`, `claude-fable-5-1`, `claude-opus-5`, `claude-fable-5`, `claude-opus-4-8`, `claude-opus-4-7`, `claude-sonnet-5-5`, `claude-sonnet-5`, and `claude-sonnet-4-6` are supported. You can optionally pass `instructions` (csharp, go: `Instructions`) to steer the dreaming process. See [Steer with instructions](https://platform.claude.com/docs/en/managed-agents/dreams#steer-with-instructions).
169Dreaming inputs include the pre-existing memory store and an array of sessions. The model you choose runs the dreaming pipeline. Only [select models](https://platform.claude.com/docs/en/managed-agents/dreams#feature-availability) are supported. You can optionally pass `instructions` (csharp, go: `Instructions`) to steer the dreaming process. See [Steer with instructions](https://platform.claude.com/docs/en/managed-agents/dreams#steer-with-instructions).
175170
176171The response is the full `dream` resource with `status: "pending"`:
177172
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649644
650645## Limits
651646
652| Limit | Value |
653| -------------------------------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
654| Sessions per dream | 100 |
655| `instructions` (csharp, go: `Instructions`) length | 4,096 characters |
656| Supported models | `claude-opus-5-5`, `claude-fable-5-1`, `claude-opus-5`, `claude-fable-5`, `claude-opus-4-8`, `claude-opus-4-7`, `claude-sonnet-5-5`, `claude-sonnet-5`, `claude-sonnet-4-6` |
657
658647Default rate limits apply to dream creation while this feature is in research preview. [Contact support](https://support.claude.com) if you need higher limits.
659648
660649## Availability
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667656
668657* Availability: Available
669658
670| Status | Cloud platforms | Models |
671| ---------------- | --------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
672| Research preview | Claude API | [Claude Fable 5.1](https://platform.claude.com/docs/en/models/fable-5-1/overview), [Claude Fable 5](https://platform.claude.com/docs/en/models/fable-5/overview), Claude Mythos Preview, [Claude Opus 5.5](https://platform.claude.com/docs/en/models/opus-5-5/overview), [Claude Opus 5](https://platform.claude.com/docs/en/models/opus-5/overview), [Claude Sonnet 5.5](https://platform.claude.com/docs/en/models/sonnet-5-5/overview), [Claude Sonnet 5](https://platform.claude.com/docs/en/models/sonnet-5/overview), [Claude Opus 4.8](https://platform.claude.com/docs/en/models/opus-4-8/overview), [Claude Opus 4.7](https://platform.claude.com/docs/en/models/opus-4-7/overview), [Claude Sonnet 4.6](https://platform.claude.com/docs/en/models/sonnet-4-6/overview) |
659| Status | Cloud platforms | Models |
660| ---------------- | --------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
661| Research preview | Claude API | [Claude Fable 5.1](https://platform.claude.com/docs/en/models/fable-5-1/overview), [Claude Fable 5](https://platform.claude.com/docs/en/models/fable-5/overview), [Claude Opus 5.5](https://platform.claude.com/docs/en/models/opus-5-5/overview), [Claude Opus 5](https://platform.claude.com/docs/en/models/opus-5/overview), [Claude Sonnet 5.5](https://platform.claude.com/docs/en/models/sonnet-5-5/overview), [Claude Sonnet 5](https://platform.claude.com/docs/en/models/sonnet-5/overview), [Claude Opus 4.8](https://platform.claude.com/docs/en/models/opus-4-8/overview), [Claude Opus 4.7](https://platform.claude.com/docs/en/models/opus-4-7/overview), [Claude Sonnet 4.6](https://platform.claude.com/docs/en/models/sonnet-4-6/overview) |
673662
674663### Required beta headers
675664
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679668
680669* `managed-agents-2026-04-01`
681670* `dreaming-2026-04-21`
671
672Dream endpoints require the `dreaming-2026-04-21` beta header. The `managed-agents-2026-04-01` header on its own doesn’t grant access to dreams. Session calls use `managed-agents-2026-04-01`, and memory store calls use `agent-memory-2026-07-22`. The SDK sets the right header on each call.
682673
683674### Data handling
684675
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