cache-diagnostics changedbuild-with-claude/cache-diagnostics
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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) ### Data handling
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55featureMetadata:
66 status: ga
77 zdr:
8 eligibility: eligible
9 note: Excludes [Covered Models](https://platform.claude.com/docs/en/manage-claude/api-and-data-retention#model-specific-data-retention-requirements).
8 eligibility: qualified
9 note: Excludes [Covered Models](https://platform.claude.com/docs/en/manage-claude/api-and-data-retention#model-specific-data-retention-requirements). Your prompts and Claude's outputs are not stored. A fingerprint of cryptographic hashes and token-count estimates is retained briefly to allow comparison against the next request.
10 supportedModels:
11 - claude-fable-5-1
12 - claude-mythos-5-1
13 - claude-fable-5
14 - claude-mythos-5
15 - claude-mythos-preview
16 - claude-opus-5-5
17 - claude-opus-5
18 - claude-sonnet-5-5
19 - claude-sonnet-5
20 - claude-haiku-5-5
21 - claude-haiku-4-5-20251001
22 - claude-opus-4-8
23 - claude-opus-4-7
24 - claude-opus-4-6
25 - claude-sonnet-4-6
26 - claude-opus-4-5-20251101
27 - claude-sonnet-4-5-20250929
1028 supportedPlatforms:
1129 Claude API: ga
1230---
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10381056
10391057The API stores a fingerprint only for requests that include the `diagnostics` object. The fingerprint consists only of cryptographic hashes and token-count estimates, keyed by the response `id` and scoped to your organization and workspace. Fingerprints expire after a short period and are not used for any other purpose.
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1041For ZDR eligibility across all features, see [API and data retention](https://platform.claude.com/docs/en/manage-claude/api-and-data-retention).
1042
10431059## See also
10441060
10451061* [Prompt caching](https://platform.claude.com/docs/en/build-with-claude/prompt-caching)
10461062* [Token counting](https://platform.claude.com/docs/en/build-with-claude/token-counting)
1063
1064## Availability
1065
1066Cache diagnostics are available on every model.
1067
1068### API support
1069
1070#### [Messages API](https://platform.claude.com/docs/en/build-with-claude/working-with-messages)
1071
1072* Availability: Available
1073
1074| Status | Cloud platforms |
1075| --------- | --------------- |
1076| Available | Claude API |
1077
1078#### [Managed Agents](https://platform.claude.com/docs/en/managed-agents/overview)
1079
1080* Availability: Not available
1081
1082### Data handling
1083
1084[Data handling overview](https://platform.claude.com/docs/en/manage-claude/api-and-data-retention#feature-eligibility)
1085
1086| Item | Zero data retention | HIPAA |
1087| ------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------------ |
1088| Status | Eligible (qualified; excludes [Covered Models](https://platform.claude.com/docs/en/manage-claude/api-and-data-retention#model-specific-data-retention-requirements)) | Not eligible |
1089| Details | Your prompts and Claude’s outputs are not stored. A fingerprint of cryptographic hashes and token-count estimates is retained briefly to allow comparison against the next request. [Learn more](https://platform.claude.com/docs/en/build-with-claude/cache-diagnostics#data-retention) | — |
1090
1091Applicable endpoints:
1092
1093* `/v1/messages` with `diagnostics`
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