api-20261109T190724Z / page 4 of 7 / documentation capture

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88 url: https://platform.claude.com/docs/en/manage-claude/opentelemetry

99 status: beta

1010 supportedModels:

11 - claude-fable-5-2

12 - claude-mythos-5-2

1113 - claude-fable-5-1

1214 - claude-mythos-5-1

1315 - claude-fable-5

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55featureMetadata:

66 status: stable

77 supportedModels:

8 - claude-fable-5-2

9 - claude-mythos-5-2

810 - claude-fable-5-1

911 - claude-mythos-5-1

1012 - claude-fable-5

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253255

254256### Supported models

255257

256Priority 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.

258Priority Tier is supported on all available Claude models except Claude Fable 5.2, Claude Fable 5.1, Claude Haiku 5.5, Claude Mythos 5.2, 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.

257259

258260Check the [Models overview](https://platform.claude.com/docs/en/models/overview) for more details on available models.

259261

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88 eligibility: not-eligible

99 note: 29-day retention; async storage required.

1010 supportedModels:

11 - claude-fable-5-2

12 - claude-mythos-5-2

1113 - claude-fable-5-1

1214 - claude-mythos-5-1

1315 - claude-fable-5

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107109

108110| Model | Batch input | Batch output |

109111| :--------------------------------------------------------------------------------------------------------------------------------------------------------------------- | :----------- | :------------ |

112| Claude Fable 5.2 | $4 / MTok | $20 / MTok |

113| Claude Mythos 5.2 ([limited availability](https://support.claude.com/en/articles/14604842)) | $4 / MTok | $20 / MTok |

110114| Claude Fable 5.1 | $5 / MTok | $25 / MTok |

111115| Claude Mythos 5.1 ([limited availability](https://support.claude.com/en/articles/14604842)) | $5 / MTok | $25 / MTok |

112116| Claude Fable 5 | $5 / MTok | $25 / MTok |

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88 eligibility: qualified

99 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.

1010 supportedModels:

11 - claude-fable-5-2

12 - claude-mythos-5-2

1113 - claude-fable-5-1

1214 - claude-mythos-5-1

1315 - claude-fable-5

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88 eligibility: eligible

99 note: Excludes [Covered Models](https://platform.claude.com/docs/en/manage-claude/api-and-data-retention#model-specific-data-retention-requirements).

1010 supportedModels:

11 - claude-fable-5-2

12 - claude-mythos-5-2

1113 - claude-fable-5-1

1214 - claude-mythos-5-1

1315 - claude-fable-5

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99 eligibility: eligible

1010 note: Excludes [Covered Models](https://platform.claude.com/docs/en/manage-claude/api-and-data-retention#model-specific-data-retention-requirements). Context edits (tool use clearing and thinking clearing) are applied in real time.

1111 supportedModels:

12 - claude-fable-5-2

13 - claude-mythos-5-2

1214 - claude-fable-5-1

1315 - claude-mythos-5-1

1416 - claude-fable-5

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8991

9092Context editing is applied server-side before the prompt reaches Claude. Your client application maintains the full, unmodified conversation history. You do not need to sync your client state with the edited version. Continue managing your full conversation history locally as you normally would.

9193

92On Claude 5.1 and later models, server-side context management never invalidates thinking blocks. Client-side edits to earlier turns can invalidate the thinking blocks in every later assistant turn. See [Keeping the prefix unchanged](https://platform.claude.com/docs/en/build-with-claude/preserved-thinking#prefix-check).

94On Claude Fable 5.2, Claude Mythos 5.2, Claude Fable 5.1, Claude Mythos 5.1, Claude Opus 5.5, Claude Sonnet 5.5, and Claude Haiku 5.5, server-side context management never invalidates thinking blocks. Client-side edits to earlier turns can invalidate the thinking blocks in every later assistant turn. See [Keeping the prefix unchanged](https://platform.claude.com/docs/en/build-with-claude/preserved-thinking#prefix-check).

9395

9496### Context editing and prompt caching

9597

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363363You need to migrate off `type: "enabled"` if:

364364

365365* You use Claude Opus 4.6 or Claude Sonnet 4.6, where `budget_tokens` is deprecated.

366* You use Claude 4.7 or a later model, such as Claude Opus 5.5, Claude Sonnet 5, Claude Sonnet 5.5, Claude Fable 5.1, or Claude Haiku 5.5, where `type: "enabled"` returns a 400 error.

366* You use Claude 4.7 or a later model, such as Claude Opus 5.5, Claude Sonnet 5, Claude Sonnet 5.5, Claude Fable 5.2, Claude Fable 5.1, or Claude Haiku 5.5, where `type: "enabled"` returns a 400 error.

367367

368368The mapping is small: remove `budget_tokens`, set `thinking: {type: "adaptive"}`, and control reasoning depth with `output_config: {effort: ...}` instead of a token budget.

369369

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88 eligibility: not-eligible

99 note: Files retained until explicitly deleted or they reach their configured expiration.

1010 supportedModels:

11 - claude-fable-5-2

12 - claude-mythos-5-2

1113 - claude-fable-5-1

1214 - claude-mythos-5-1

1315 - claude-fable-5

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18991899

19001900On a refusal, the [`stop_details`](https://platform.claude.com/docs/en/api/messages/create#message.stop_details) object identifies the policy category that triggered it. The categories and the full refusal response shape are covered in [What a refusal looks like](https://platform.claude.com/docs/en/build-with-claude/refusals-and-fallback#refusal-response). `stop_details` is `null` for all stop reasons other than `refusal`.

19011901

1902You can usually get a response to a refused request by retrying it on another Claude model. This works for Claude Fable 5.1, Claude Fable 5, Claude Opus 5.5, Claude Opus 5, Claude Sonnet 5.5, and Claude Haiku 5.5. [Refusals and fallback](https://platform.claude.com/docs/en/build-with-claude/refusals-and-fallback) shows how to set up that retry, server-side or in your client. Claude Haiku 5.5 has no server-side fallback, so set up its retry with [client-side fallback](https://platform.claude.com/docs/en/build-with-claude/refusals-and-fallback#client-side-fallback). If you build the retry yourself from any of these models except Claude Haiku 5.5, [fallback credit](https://platform.claude.com/docs/en/build-with-claude/fallback-credit) covers how to avoid paying the prompt-cache cost twice.

1902You can usually get a response to a refused request by retrying it on another Claude model. This works for Claude Fable 5.2, Claude Fable 5.1, Claude Fable 5, Claude Opus 5.5, Claude Opus 5, Claude Sonnet 5.5, and Claude Haiku 5.5. [Refusals and fallback](https://platform.claude.com/docs/en/build-with-claude/refusals-and-fallback) shows how to set up that retry, server-side or in your client. Claude Haiku 5.5 has no server-side fallback, so set up its retry with [client-side fallback](https://platform.claude.com/docs/en/build-with-claude/refusals-and-fallback#client-side-fallback). If you build the retry yourself from any of these models except Claude Haiku 5.5, [fallback credit](https://platform.claude.com/docs/en/build-with-claude/fallback-credit) covers how to avoid paying the prompt-cache cost twice.

19031903

19041904### model\_context\_window\_exceeded

19051905

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99 eligibility: not-eligible

1010 note: A thread's contents (the conversation, system prompt, and tools) are held in memory, encrypted under a server-managed key, never written to durable storage, and deleted no more than 1 hour after the thread's last use. Using this feature does not affect your use of other ZDR eligible features.

1111 supportedModels:

12 - claude-fable-5-2

13 - claude-mythos-5-2

1214 - claude-fable-5-1

1315 - claude-mythos-5-1

1416 - claude-fable-5

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600602

601603To change a create-only or fixed field, start a new thread: send the full conversation in a create request with the new values.

602604

603On Claude Fable 5.1, Claude Mythos 5.1, Claude Opus 5.5, Claude Sonnet 5.5, and Claude Haiku 5.5, changing `system` or `tools` makes the `thinking` and `redacted_thinking` blocks already in the conversation invalid, and the create request can return a 400 error. To avoid it, leave every `thinking` and `redacted_thinking` block out of the conversation you send. The model then answers without that earlier reasoning. See [What counts as an edit](https://platform.claude.com/docs/en/build-with-claude/preserved-thinking#what-counts-as-an-edit), [When `prefix_mismatch_behavior` is unset](https://platform.claude.com/docs/en/build-with-claude/preserved-thinking#enforcement), and [What the API does with an invalid block](https://platform.claude.com/docs/en/build-with-claude/preserved-thinking#mismatch-behavior).

605On Claude Fable 5.2, Claude Mythos 5.2, Claude Fable 5.1, Claude Mythos 5.1, Claude Opus 5.5, Claude Sonnet 5.5, and Claude Haiku 5.5, changing `system` or `tools` makes the `thinking` and `redacted_thinking` blocks already in the conversation invalid, and the create request can return a 400 error. To avoid it, leave every `thinking` and `redacted_thinking` block out of the conversation you send. The model then answers without that earlier reasoning. See [What counts as an edit](https://platform.claude.com/docs/en/build-with-claude/preserved-thinking#what-counts-as-an-edit), [When `prefix_mismatch_behavior` is unset](https://platform.claude.com/docs/en/build-with-claude/preserved-thinking#enforcement), and [What the API does with an invalid block](https://platform.claude.com/docs/en/build-with-claude/preserved-thinking#mismatch-behavior).

604606

605607Send only the new messages on a continue request. The API doesn’t check them against the messages it already has. A message you send again can appear twice in the conversation, or the request can return an error. For example, a continue request that starts with the previous response returns an error.

606608

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88 eligibility: eligible

99 note: Excludes [Covered Models](https://platform.claude.com/docs/en/manage-claude/api-and-data-retention#model-specific-data-retention-requirements).

1010 supportedModels:

11 - claude-fable-5-2

12 - claude-mythos-5-2

1113 - claude-fable-5-1

1214 - claude-mythos-5-1

1315 - claude-fable-5

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88 eligibility: eligible

99 note: Excludes [Covered Models](https://platform.claude.com/docs/en/manage-claude/api-and-data-retention#model-specific-data-retention-requirements).

1010 supportedModels:

11 - claude-fable-5-2

12 - claude-mythos-5-2

1113 - claude-fable-5-1

1214 - claude-mythos-5-1

1315 - claude-fable-5

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55featureMetadata:

66 status: stable

77 supportedModels:

8 - claude-fable-5-2

9 - claude-mythos-5-2

810 - claude-fable-5-1

911 - claude-mythos-5-1

1012 - claude-fable-5

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88 eligibility: qualified

99 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. Only the JSON schema is cached, for up to 24 hours since last use. This also covers strict tool use (`strict: true` on tools), which uses the same grammar pipeline."

1010 supportedModels:

11 - claude-fable-5-2

12 - claude-mythos-5-2

1113 - claude-fable-5-1

1214 - claude-mythos-5-1

1315 - claude-fable-5

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38382. Add prompt guidance only if Claude’s triggering still doesn’t match your needs at that level.

3939

4040<Note>

41 To get less thinking on Claude Sonnet 5.5 and Claude Haiku 5.5, lower the effort level. Asking Claude Sonnet 5.5 in the system prompt to think less doesn’t reliably reduce its thinking. In Anthropic’s testing, telling Claude Haiku 5.5 in the prompt to answer directly didn’t stop it from thinking. See [Prompting Claude Sonnet 5.5](https://platform.claude.com/docs/en/build-with-claude/prompt-engineering/prompting-claude-sonnet-5-5#calibrate-effort) and [Prompting Claude Haiku 5.5](https://platform.claude.com/docs/en/build-with-claude/prompt-engineering/prompting-claude-haiku-5-5#use-effort-to-control-thinking).

41 To get less thinking on Claude Sonnet 5.5 and Claude Haiku 5.5, lower the effort level. Asking Claude Sonnet 5.5 in the system prompt to think less doesn’t reliably reduce its thinking. In Anthropic’s testing, telling Claude Haiku 5.5 in the prompt to answer directly didn’t stop it from thinking. See [Prompting Claude Sonnet 5.5](https://platform.claude.com/docs/en/build-with-claude/prompt-engineering/prompting-claude-sonnet-5-5#calibrate-effort) and [Prompting Claude Haiku 5.5](https://platform.claude.com/docs/en/build-with-claude/prompt-engineering/prompting-claude-haiku-5-5#use-effort-to-control-thinking). To get less thinking on Claude Fable 5.2, lower the effort level too. In Anthropic’s testing, an instruction to answer directly without deliberating didn’t stop the model from thinking at `medium` effort and above. See [Prompting Claude Fable 5.2](https://platform.claude.com/docs/en/build-with-claude/prompt-engineering/prompting-claude-fable-5-2#calibrate-effort).

4242</Note>

4343

4444For broader prompting guidance with thinking, see [leverage thinking and interleaved thinking capabilities](https://platform.claude.com/docs/en/build-with-claude/prompt-engineering/claude-prompting-best-practices#leverage-thinking-and-interleaved-thinking-capabilities).

from line 96

9696

9797Per-message steering is useful when only some requests in a conversation warrant extended reasoning. An agent harness, for example, can append the encouraging phrase on planning steps and the discouraging phrase on routine confirmations, without touching the system prompt or changing any request parameters between turns.

9898

99On Claude Haiku 5.5, the discouraging phrase doesn’t reliably reduce thinking. Where your platform supports it, run routine turns on that model with less thinking by using a [per-message effort change](https://platform.claude.com/docs/en/build-with-claude/effort#change-effort-mid-conversation-beta) (beta) instead, which also keeps the prompt cache.

99On Claude Haiku 5.5, the discouraging phrase doesn’t reliably reduce thinking. Where your platform supports it, run routine turns on that model with less thinking by using a [per-message effort change](https://platform.claude.com/docs/en/build-with-claude/effort#change-effort-mid-conversation-beta) (beta) instead, which also keeps the prompt cache. The same holds for Claude Fable 5.2. In Anthropic’s testing, the discouraging phrase didn’t stop the model from thinking at `medium` effort and above. Where your platform supports it, use a per-message effort change for those turns.

100100

101101### Verify steering on your workload

102102

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1414

1515Each link leads to the full statement on the Thinking page:

1616

17* [Limit tool choice to `auto` or `none` in manual mode](https://platform.claude.com/docs/en/build-with-claude/thinking#thinking-with-tool-use): `tool_choice` options that force tool use return an error with manual extended thinking (`thinking: {type: "enabled"}`). Adaptive thinking supports forced tool use, with exceptions. Claude Opus 5.5, Claude Sonnet 5.5, Claude Fable 5.1, and Claude Mythos 5.1 return a 400 error instead. Where forced tool use is accepted, it skips thinking: the response starts with the tool call.

17* [Limit tool choice to `auto` or `none` in manual mode](https://platform.claude.com/docs/en/build-with-claude/thinking#thinking-with-tool-use): `tool_choice` options that force tool use return an error with manual extended thinking (`thinking: {type: "enabled"}`). Adaptive thinking supports forced tool use, with exceptions. Claude Opus 5.5, Claude Sonnet 5.5, Claude Fable 5.2, Claude Mythos 5.2, Claude Fable 5.1, and Claude Mythos 5.1 return a 400 error instead. Where forced tool use is accepted, it skips thinking: the response starts with the tool call.

1818* [Keep one thinking configuration per assistant turn](https://platform.claude.com/docs/en/build-with-claude/thinking#thinking-with-tool-use): a tool-use loop is one assistant turn, so change the configuration only between turns.

1919* [Pass thinking blocks back complete and unmodified](https://platform.claude.com/docs/en/build-with-claude/thinking#preserving-thinking-blocks): when you return a tool result, the thinking blocks from the assistant message must come back with it.

2020* [Echo the assistant message exactly as received](https://platform.claude.com/docs/en/build-with-claude/thinking#preserving-thinking-blocks): rebuilding the message or filtering out `redacted_thinking` blocks triggers a 400 error.

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55featureMetadata:

66 status: stable

77 supportedModels:

8 - claude-fable-5-2

9 - claude-mythos-5-2

810 - claude-fable-5-1

911 - claude-mythos-5-1

1012 - claude-fable-5

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88 eligibility: eligible

99 note: Excludes [Covered Models](https://platform.claude.com/docs/en/manage-claude/api-and-data-retention#model-specific-data-retention-requirements). Standard API calls for generating Claude responses.

1010 supportedModels:

11 - claude-fable-5-2

12 - claude-mythos-5-2

1113 - claude-fable-5-1

1214 - claude-mythos-5-1

1315 - claude-fable-5

from line 354

352354

353355### System role in messages

354356

355You can include messages with `"role": "system"` after a user turn to add a new system instruction partway through a conversation, subject to [placement rules](https://platform.claude.com/docs/en/build-with-claude/mid-conversation-system-messages#limitations). This works on Claude Fable 5.1, [Claude Mythos 5.1](https://platform.claude.com/docs/en/models/mythos-5-1/overview), Claude Fable 5, [Claude Mythos 5](https://platform.claude.com/docs/en/models/mythos-5/overview), Claude Opus 5.5, Claude Opus 4.8, Claude Opus 5, Claude Sonnet 5.5, and Claude Haiku 5.5. A `system` message that carries content cannot be the first entry in `messages`. Use the top-level `system` field for instructions that apply from the start.

357You can include messages with `"role": "system"` after a user turn to add a new system instruction partway through a conversation, subject to [placement rules](https://platform.claude.com/docs/en/build-with-claude/mid-conversation-system-messages#limitations). This works on Claude Fable 5.2, [Claude Mythos 5.2](https://platform.claude.com/docs/en/models/mythos-5-2/overview), Claude Fable 5.1, [Claude Mythos 5.1](https://platform.claude.com/docs/en/models/mythos-5-1/overview), Claude Fable 5, [Claude Mythos 5](https://platform.claude.com/docs/en/models/mythos-5/overview), Claude Opus 5.5, Claude Opus 4.8, Claude Opus 5, Claude Sonnet 5.5, and Claude Haiku 5.5. A `system` message that carries content cannot be the first entry in `messages`. Use the top-level `system` field for instructions that apply from the start.

356358

357359A mid-conversation system message has the same authority as the top-level `system` field, but because it is appended to the end of the message history, it does not invalidate any cached prefix that came before it. Use the top-level `system` field for instructions that should apply from the very first turn, and a mid-conversation system message for instructions that only become relevant later.

358360

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55featureMetadata:

66 status: beta

77 supportedModels:

8 - claude-fable-5-2

9 - claude-mythos-5-2

810 - claude-fable-5-1

911 - claude-mythos-5-1

1012 - claude-fable-5

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44description: Intercept and modify the SDK's requests and responses.

55featureMetadata:

66 supportedModels:

7 - claude-fable-5-2

8 - claude-mythos-5-2

79 - claude-fable-5-1

810 - claude-mythos-5-1

911 - claude-fable-5

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505505 }

506506

507507 dependencies {

508 implementation("com.anthropic:anthropic-java:3.6.0")

508 implementation("com.anthropic:anthropic-java:3.7.0")

509509 }

510510

511511 application {

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531531 <dependency>

532532 <groupId>com.anthropic</groupId>

533533 <artifactId>anthropic-java</artifactId>

534 <version>3.6.0</version>

534 <version>3.7.0</version>

535535 </dependency>

536536 </dependencies>

537537 </project>

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408408 <HomeSection>

409409 <HomeSectionHeader label="Models" title="The Claude model family" description="Choose the right model for your use case." />

410410

411 * [Claude Fable 5.1](https://platform.claude.com/docs/en/models/fable-5-1/overview) (`claude-fable-5-1`) — New — *For demanding reasoning and long-horizon agentic work* — Most capable · Research · Multi-day tasks

411 * [Claude Fable 5.2](https://platform.claude.com/docs/en/models/fable-5-2/overview) (`claude-fable-5-2`) — New — *For demanding reasoning and long-horizon agentic work* — Most capable · Research · Multi-day tasks

412412 * [Claude Opus 5.5](https://platform.claude.com/docs/en/models/opus-5-5/overview) (`claude-opus-5-5`) — New — *For long-running agentic coding and knowledge work* — Complex projects · Agents · Coding

413413 * [Claude Sonnet 5.5](https://platform.claude.com/docs/en/models/sonnet-5-5/overview) (`claude-sonnet-5-5`) — New — *The best combination of speed and intelligence* — Everyday tasks · Writing · Cost-efficient

414414 * [Claude Haiku 5.5](https://platform.claude.com/docs/en/models/haiku-5-5/overview) (`claude-haiku-5-5`) — New — *For high-volume, latency-sensitive tasks such as classification, extraction, and routing* — Fastest · Lowest cost · High volume

intro Changed · +2 / -2 lines

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1919

2020## Explore the latest generation of Claude models

2121

22If you’re unsure which model to use, start with [Claude Opus 5.5](https://platform.claude.com/docs/en/models/opus-5-5/overview) for most workloads. Use [Claude Fable 5.1](https://platform.claude.com/docs/en/models/fable-5-1/overview) for demanding reasoning and long-horizon agentic work, or when your evals on Claude Opus 5.5 at higher effort still fall short. All current models support text and image input, text output, multilingual capabilities, vision, and tool use. Each model’s page lists the platforms it’s available on.

22If you’re unsure which model to use, start with [Claude Opus 5.5](https://platform.claude.com/docs/en/models/opus-5-5/overview) for most workloads. Use [Claude Fable 5.2](https://platform.claude.com/docs/en/models/fable-5-2/overview) for demanding reasoning and long-horizon agentic work, or when your evals on Claude Opus 5.5 at higher effort still fall short. All current models support text and image input, text output, multilingual capabilities, vision, and tool use. Each model’s page lists the platforms it’s available on.

2323

24* [Claude Fable 5.1](https://platform.claude.com/docs/en/models/fable-5-1/overview) (`claude-fable-5-1`) — New — *For demanding reasoning and long-horizon agentic work* — Most capable · Research · Multi-day tasks

24* [Claude Fable 5.2](https://platform.claude.com/docs/en/models/fable-5-2/overview) (`claude-fable-5-2`) — New — *For demanding reasoning and long-horizon agentic work* — Most capable · Research · Multi-day tasks

2525* [Claude Opus 5.5](https://platform.claude.com/docs/en/models/opus-5-5/overview) (`claude-opus-5-5`) — New — *For long-running agentic coding and knowledge work* — Complex projects · Agents · Coding

2626* [Claude Sonnet 5.5](https://platform.claude.com/docs/en/models/sonnet-5-5/overview) (`claude-sonnet-5-5`) — New — *The best combination of speed and intelligence* — Everyday tasks · Writing · Cost-efficient

2727* [Claude Haiku 5.5](https://platform.claude.com/docs/en/models/haiku-5-5/overview) (`claude-haiku-5-5`) — New — *For high-volume, latency-sensitive tasks such as classification, extraction, and routing* — Fastest · Lowest cost · High volume

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3838* **Claude consumer products:** Claude Free, Pro, Max, and Ultra plans, including when customers on those plans use Claude’s web, desktop, or mobile apps or Claude Code.

3939* **Claude Teams and Claude Enterprise product interfaces:** These interfaces are not ZDR-eligible. The one exception is Claude Code on Claude Enterprise, which has its own ZDR offering, separate from the ZDR arrangement described on this page. That offering is available only to qualified accounts on Claude Enterprise and requires separate enablement by Anthropic. See the [Claude Code ZDR documentation](https://code.claude.com/docs/en/zero-data-retention), which applies to Claude Enterprise organizations only.

4040* **Claude for Excel:** Not currently ZDR-eligible.

41* **Claude Fable 5.1, Claude Mythos 5.1, Claude Fable 5, and Claude Mythos 5:** These models require 30-day data retention and are not available under ZDR unless expressly authorized by Anthropic. See [Model-specific data retention requirements](https://platform.claude.com/docs/en/manage-claude/api-and-data-retention#model-specific-data-retention-requirements).

41* **Claude Fable 5.2, Claude Mythos 5.2, Claude Fable 5.1, Claude Mythos 5.1, Claude Fable 5, and Claude Mythos 5:** These models require 30-day data retention and are not available under ZDR unless expressly authorized by Anthropic. See [Model-specific data retention requirements](https://platform.claude.com/docs/en/manage-claude/api-and-data-retention#model-specific-data-retention-requirements).

4242* **Third-party integrations:** Data processed by third-party websites, tools, or other integrations is not covered, though some may have similar offerings. Review each service’s data handling practices.

4343* **Flagged content and legal holds:** See [Retention regardless of arrangement](https://platform.claude.com/docs/en/manage-claude/api-and-data-retention#retention-regardless-of-arrangement).

4444

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126126

127127## Model-specific data retention requirements

128128

129Claude Fable 5.1, Claude Mythos 5.1, Claude Fable 5, and Claude Mythos 5 are designated Covered Models (see the [Covered Models support article](https://support.claude.com/en/articles/15425695)) and require 30-day data retention; ZDR is therefore not available for any of them unless expressly authorized by Anthropic. On the Claude API, requests to Claude Fable 5 from an organization whose data retention configuration does not meet this requirement return a `400 invalid_request_error`:

129Claude Fable 5.2, Claude Mythos 5.2, Claude Fable 5.1, Claude Mythos 5.1, Claude Fable 5, and Claude Mythos 5 are designated Covered Models (see the [Covered Models support article](https://support.claude.com/en/articles/15425695)) and require 30-day data retention; ZDR is therefore not available for any of them unless expressly authorized by Anthropic. On the Claude API, requests to Claude Fable 5 from an organization whose data retention configuration does not meet this requirement return a `400 invalid_request_error`:

130130

131131```json

132132{

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88 url: https://platform.claude.com/docs/en/manage-claude/opentelemetry

99 status: beta

1010 supportedModels:

11 - claude-fable-5-2

12 - claude-mythos-5-2

1113 - claude-fable-5-1

1214 - claude-mythos-5-1

1315 - claude-fable-5

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