service-tiers changedapi/service-tiers
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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)
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22title: Service tiers
33url: https://platform.claude.com/docs/en/api/service-tiers
44description: Different tiers of service allow you to balance availability, performance, and predictable costs based on your application's needs.
5featureMetadata:
6 status: ga
7 supportedModels:
8 - claude-fable-5-1
9 - claude-mythos-5-1
10 - claude-fable-5
11 - claude-mythos-5
12 - claude-mythos-preview
13 - claude-opus-5-5
14 - claude-opus-5
15 - claude-sonnet-5-5
16 - claude-sonnet-5
17 - claude-haiku-5-5
18 - claude-haiku-4-5-20251001
19 - claude-opus-4-8
20 - claude-opus-4-7
21 - claude-opus-4-6
22 - claude-sonnet-4-6
23 - claude-opus-4-5-20251101
24 - claude-sonnet-4-5-20250929
25 supportedPlatforms:
26 Claude API: ga
527---
628
729<Warning>
30 Service tiers are legacy.
31</Warning>
32
33<Warning>
834 Priority Tier capacity commitments are no longer available for purchase. Organizations with an existing commitment can continue to use Priority Tier through their contract end date, and this page remains available as a reference for them. If you need guaranteed capacity, [contact sales](https://claude.com/contact-sales).
935</Warning>
1036
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230256Priority Tier is supported on all available Claude models except Claude Fable 5.1, Claude Haiku 5.5, Claude Mythos 5.1, Claude Mythos 5, [Claude Mythos Preview](https://anthropic.com/glasswing), Claude Opus 5.5, Claude Opus 5, Claude Sonnet 5.5, and Claude Sonnet 5.
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232258Check the [Models overview](https://platform.claude.com/docs/en/models/overview) for more details on available models.
259
260## Availability
261
262Service tiers are available on every model.
263
264### API support
265
266#### [Messages API](https://platform.claude.com/docs/en/build-with-claude/working-with-messages)
267
268* Availability: Available
269* Usage: Needs a Priority Tier commitment, which is no longer sold. With one, requests use Priority Tier by default; set `service_tier` to `"standard_only"` to use only standard capacity.
270
271| Status | Cloud platforms |
272| --------- | --------------- |
273| Available | Claude API |
274
275#### [Managed Agents](https://platform.claude.com/docs/en/managed-agents/overview)
276
277* Availability: Not available
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