budgets changedmanaged-agents/budgets
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## Availability ### API support #### [Messages API](https://platform.claude.com/docs/en/build-with-claude/working-with-messages) #### [Managed Agents](https://platform.claude.com/docs/en/managed-agents/overview) ### Required beta headers ### Data handling
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88 url: https://platform.claude.com/docs/en/managed-agents/overview
99 status: beta
1010 betaHeader: managed-agents-2026-04-01
11 zdr:
12 eligibility: not-eligible
13 note: Sessions are stateful resources; transcripts persist until you delete them. Applies to all Managed Agents sub-features, including Self-hosted sandboxes.
14 supportedModels:
15 - claude-fable-5-1
16 - claude-mythos-5-1
17 - claude-fable-5
18 - claude-mythos-5
19 - claude-mythos-preview
20 - claude-opus-5-5
21 - claude-opus-5
22 - claude-sonnet-5-5
23 - claude-sonnet-5
24 - claude-haiku-5-5
25 - claude-haiku-4-5-20251001
26 - claude-opus-4-8
27 - claude-opus-4-7
28 - claude-opus-4-6
29 - claude-sonnet-4-6
30 - claude-opus-4-5-20251101
31 - claude-sonnet-4-5-20250929
32 supportedPlatforms:
33 Claude API: beta
34 Claude Platform on AWS: beta
35 Claude Models on Google Cloud (Anthropic managed): beta
1136---
1237
1338A session budget is an optional hard spend ceiling you set when you [create a session](https://platform.claude.com/docs/en/managed-agents/sessions). The platform continuously prices everything the session consumes at public list rates (the session’s **list cost**) and stops issuing new model requests once that cost reaches the budget. The request in flight when the cap is crossed still completes, so the final list cost can land [a fraction past the budget](https://platform.claude.com/docs/en/managed-agents/budgets#when-a-session-reaches-its-budget). A session at its budget pauses and goes [idle](https://platform.claude.com/docs/en/managed-agents/session-operations#session-statuses) rather than terminating; changing or removing the budget resumes the work that the budget paused. Deployments accept the same budget and apply it to each session they start; see [Budgets on deployments](https://platform.claude.com/docs/en/managed-agents/budgets#budgets-on-deployments).
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426451<Note>
427452 Session budgets are hard caps in US dollars (written in cents) on a single session, enforced by the platform. They are distinct from the Messages API’s [task budgets](https://platform.claude.com/docs/en/build-with-claude/task-budgets), which are advisory, token-denominated budgets the model uses to self-regulate within one agentic loop.
428453</Note>
454
455## Availability
456
457Session budgets are in beta on every model.
458
459### API support
460
461#### [Messages API](https://platform.claude.com/docs/en/build-with-claude/working-with-messages)
462
463* Availability: Not available
464* Usage: Use [Task budgets](https://platform.claude.com/docs/en/build-with-claude/task-budgets) instead.
465
466#### [Managed Agents](https://platform.claude.com/docs/en/managed-agents/overview)
467
468* Availability: Available
469
470| Status | Cloud platforms |
471| ------ | ----------------------- |
472| Beta | All supported platforms |
473
474### Required beta headers
475
476[Beta headers overview](https://platform.claude.com/docs/en/api/beta-headers)
477
478Beta headers allow you to access experimental features and new model capabilities before they become part of the standard API.
479
480* `managed-agents-2026-04-01`
481
482### Data handling
483
484[Data handling overview](https://platform.claude.com/docs/en/manage-claude/api-and-data-retention#feature-eligibility)
485
486| Item | Zero data retention | HIPAA |
487| ------- | -------------------------------------------------------------------------------------------------------------------------------------------------------- | ---------------------------------------------------------------------------- |
488| Status | Not eligible | Not eligible |
489| Details | Sessions are stateful resources; transcripts persist until you delete them. Applies to all Managed Agents sub-features, including Self-hosted sandboxes. | Applies to all Managed Agents sub-features, including Self-hosted sandboxes. |
490
491Applicable endpoints:
492
493* `/v1/agents`
494* `/v1/sessions`
495* `/v1/environments`
429496
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