advisor-tool changedagents-and-tools/tool-use/advisor-tool
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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). Advisor model output is returned in the API response; nothing is stored server-side after the response.
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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6062
6163The advisor fits these configurations:
6264
63* **You currently use Sonnet on complex tasks:** Add a higher-tier advisor. Opus keeps total cost similar or lower; Claude Fable 5.1 maximizes the quality lift.
65* **You currently use Sonnet on complex tasks:** Add a higher-tier advisor. Opus keeps total cost similar or lower; Claude Fable 5.2 maximizes the quality lift.
6466* **You currently use Haiku and want a step up in intelligence:** Add an Opus or Fable advisor. Expect higher cost than Haiku alone, but lower than switching the executor to a larger model.
6567
6668Results are task-dependent. Evaluate on your own workload.
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371373| `advisor_redacted_result` | `encrypted_content`, `stop_reason` | The advisor model returns encrypted output. |
372374
373375<Note>
374 Claude Sonnet 5.5, Claude Fable 5.1, Claude Mythos 5.1, Claude Opus 5.5, Claude Opus 5, Claude Fable 5, Claude Mythos 5, and Claude Haiku 5.5 advisors return the encrypted `advisor_redacted_result`. Every other advisor model in [Model compatibility](https://platform.claude.com/docs/en/agents-and-tools/tool-use/advisor-tool#model-compatibility) returns the plaintext `advisor_result`. To read the advice text in your own responses, use an advisor that returns plaintext, such as `claude-opus-4-8`, where [Model compatibility](https://platform.claude.com/docs/en/agents-and-tools/tool-use/advisor-tool#model-compatibility) lists one for your executor. Claude Sonnet 5.5, Claude Fable 5.1, Claude Mythos 5.1, Claude Opus 5.5, Claude Opus 5, Claude Fable 5, and Claude Mythos 5 executors pair only with advisors that return the encrypted form, so on those executors the advice text isn’t readable in the response.
376 Claude Fable 5.2, Claude Mythos 5.2, Claude Sonnet 5.5, Claude Fable 5.1, Claude Mythos 5.1, Claude Opus 5.5, Claude Opus 5, Claude Fable 5, Claude Mythos 5, and Claude Haiku 5.5 advisors return the encrypted `advisor_redacted_result`. Every other advisor model in [Model compatibility](https://platform.claude.com/docs/en/agents-and-tools/tool-use/advisor-tool#model-compatibility) returns the plaintext `advisor_result`. To read the advice text in your own responses, use an advisor that returns plaintext, such as `claude-opus-4-8`, where [Model compatibility](https://platform.claude.com/docs/en/agents-and-tools/tool-use/advisor-tool#model-compatibility) lists one for your executor. Claude Fable 5.2, Claude Mythos 5.2, Claude Sonnet 5.5, Claude Fable 5.1, Claude Mythos 5.1, Claude Opus 5.5, Claude Opus 5, Claude Fable 5, and Claude Mythos 5 executors pair only with advisors that return the encrypted form, so on those executors the advice text isn’t readable in the response.
375377</Note>
376378
377379Here is the same request sent twice, identical except for the advisor `model` in the tool definition, showing both variants.
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406408
407409With `advisor_result`, the `text` field contains human-readable advice. With `advisor_redacted_result`, the `encrypted_content` field contains an opaque blob that you cannot read. In the next request, the server decrypts it and renders the plaintext into the executor’s prompt.
408410
409In both cases, round-trip the content verbatim in later requests. If you switch advisor models mid-conversation, branch on `content.type` to handle both shapes.
411In both cases, round-trip the content verbatim in later requests. If you switch advisor models mid-conversation, branch on `content.type` to handle both shapes. A switch is an edit to `tools`, so read [Multi-turn conversations](https://platform.claude.com/docs/en/agents-and-tools/tool-use/advisor-tool#multi-turn-conversations) before you make one in a conversation that carries thinking blocks.
410412
411413### Error results
412414
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742744 ```
743745</CodeGroup>
744746
745You can drop the advisor tool from `tools` in a follow-up request while the message history still contains `advisor_tool_result` blocks, as long as no advisor call is [still pending](https://platform.claude.com/docs/en/agents-and-tools/tool-use/advisor-tool#resuming-a-paused-turn). The API accepts the request and keeps the historical blocks, but the model cannot call the advisor in that request. You must still send the `advisor-tool-2026-03-01` beta header for those history blocks to be accepted.
747You can drop the advisor tool from `tools` in a follow-up request while the message history still contains `advisor_tool_result` blocks, as long as no advisor call is [still pending](https://platform.claude.com/docs/en/agents-and-tools/tool-use/advisor-tool#resuming-a-paused-turn). The API accepts the request and keeps the historical blocks, but the model cannot call the advisor in that request. You must still send the `advisor-tool-2026-03-01` beta header for those history blocks to be accepted. That covers the `advisor_tool_result` blocks, not thinking blocks. Removing the advisor tool, or changing its `model` or `caching`, is an [edit to `tools`](https://platform.claude.com/docs/en/build-with-claude/preserved-thinking#what-counts-as-an-edit), and it invalidates the thinking blocks already in the history. Where the API enforces the [prefix check](https://platform.claude.com/docs/en/build-with-claude/preserved-thinking#prefix-check), the request then returns a 400 error. The API enforces it on every account when the executor is Claude Fable 5.2 or Claude Mythos 5.2, and for other executors wherever the table in [When `prefix_mismatch_behavior` is unset](https://platform.claude.com/docs/en/build-with-claude/preserved-thinking#enforcement) shows it. To drop those blocks and continue, set `thinking.block_binding.prefix_mismatch_behavior` to `"drop_block"` (beta, `thinking-binding-controls-2026-08-01` header) on that request and on every later request in the conversation.
746748
747749<Note>
748 The advisor tool has no built-in conversation-level cap. To limit advisor calls across a conversation, count them client-side. When you reach your ceiling, remove the advisor tool from your `tools` array. You do not need to strip `advisor_tool_result` blocks from your message history.
750 The advisor tool has no built-in conversation-level cap. To limit advisor calls across a conversation, count them client-side. When you reach your ceiling, remove the advisor tool from your `tools` array. You do not need to strip `advisor_tool_result` blocks from your message history. Where the prefix check is enforced, read the preceding paragraph first: the request returns a 400 error unless you set `"drop_block"`.
749751</Note>
750752
751753### Resuming a paused turn
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12611263
12621264The plain-text nudge is highly salient on Claude Haiku 4.5 and Sonnet executors: 74 percent (Sonnet) to 98 percent (Claude Haiku 4.5) of nudged attempts in Anthropic’s testing called the advisor immediately at turn 2. If that lands before your executor has read the problem or gathered context, the resulting advisor call is low-context and can displace a better-timed later call. Measure your executor’s baseline first-call turn before adding the nudge. If the executor already calls the advisor reliably and its first call typically lands at turn N, set `NUDGE_TURN` greater than N. In Anthropic’s testing, a turn-2 nudge on workloads where the baseline first call was turn 7 or later correlated with a 3 to 4 percentage-point task-performance drop. On a browse workload where the baseline call rate was 86 percent, the same nudge raised engagement with no task-performance cost.
12631265
1264To force a consult on a specific request instead of nudging, set `tool_choice` to `{"type": "tool", "name": "advisor"}`, subject to the constraints in [Forcing tool use](https://platform.claude.com/docs/en/agents-and-tools/tool-use/define-tools#forcing-tool-use). Forcing tool use cannot be combined with manual extended thinking (`thinking: {type: "enabled"}`): the API returns a `400 invalid_request_error` if you enable both. Adaptive thinking supports forced tool use. Claude Opus 5.5, Claude Sonnet 5.5, Claude Fable 5.1, and Claude Mythos 5.1 executors reject `tool_choice` types `tool` and `any`, so use the prompt nudge on those models instead.
1266To force a consult on a specific request instead of nudging, set `tool_choice` to `{"type": "tool", "name": "advisor"}`, subject to the constraints in [Forcing tool use](https://platform.claude.com/docs/en/agents-and-tools/tool-use/define-tools#forcing-tool-use). Forcing tool use cannot be combined with manual extended thinking (`thinking: {type: "enabled"}`): the API returns a `400 invalid_request_error` if you enable both. Adaptive thinking supports forced tool use. Claude Fable 5.2, Claude Mythos 5.2, Claude Opus 5.5, Claude Sonnet 5.5, Claude Fable 5.1, and Claude Mythos 5.1 executors reject `tool_choice` types `tool` and `any`, so use the prompt nudge on those models instead.
12651267
12661268## Streaming
12671269
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14221424
14231425**When to enable it:** The cache write costs more than the reads save when the advisor is called two or fewer times in each conversation. Caching breaks even at roughly three advisor calls and improves from there. Enable it for long agent loops, and keep it off for short tasks.
14241426
1425**Keep it consistent:** Set `caching` once and leave it for the whole conversation. Toggling it off and on mid-conversation causes cache misses.
1427**Keep it consistent:** Set `caching` once and leave it for the whole conversation. Toggling it off and on mid-conversation causes cache misses. Where the prefix check is enforced, the toggle is also an edit to `tools`, and the next request returns a 400 error unless you set `"drop_block"`, as [Multi-turn conversations](https://platform.claude.com/docs/en/agents-and-tools/tool-use/advisor-tool#multi-turn-conversations) explains.
14261428
14271429<Warning>
14281430 [`clear_thinking`](https://platform.claude.com/docs/en/build-with-claude/context-editing) with a `keep` value other than `"all"` shifts the advisor’s quoted transcript each turn, causing advisor-side cache misses. This is a cost degradation only. Advice quality is unaffected. When thinking is on without explicit `clear_thinking` configuration, the API defaults to `keep: {type: "thinking_turns", value: 1}`, which triggers this behavior (the default on earlier Opus and Sonnet models and on Haiku models through Claude Haiku 4.5, whereas on Claude Opus 4.5 and later Opus models, Claude Sonnet 4.6 and later Sonnet models, and Claude Haiku 5.5, the default is to keep all turns). Set `keep: "all"` to preserve advisor cache stability.
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18261828
18271829### Cost control
18281830
1829* For conversation-level budgets, count advisor calls client-side. When you reach your cap, remove the advisor tool from `tools`; you do not need to strip `advisor_tool_result` blocks from your message history (see the note in [Multi-turn conversations](https://platform.claude.com/docs/en/agents-and-tools/tool-use/advisor-tool#multi-turn-conversations)).
1831* For conversation-level budgets, count advisor calls client-side. When you reach your cap, remove the advisor tool from `tools`; you do not need to strip `advisor_tool_result` blocks from your message history (see the note in [Multi-turn conversations](https://platform.claude.com/docs/en/agents-and-tools/tool-use/advisor-tool#multi-turn-conversations)). Where the API enforces the prefix check, the request that removes the tool returns a 400 error unless you set `prefix_mismatch_behavior` to `"drop_block"`, as that section explains. The API enforces the check for every account when the executor is Claude Fable 5.2 or Claude Mythos 5.2.
18301832* Enable `caching` only for conversations where you expect three or more advisor calls.
18311833
18321834## Model compatibility
from line 1835
18331835
18341836The executor model (the top-level `model` field) and the advisor model (the `model` field inside the tool definition) must form a valid pair. The advisor must be Claude Sonnet 4.6 or a more capable model, and it must be at least as capable as the executor. Models of equal capability (for example, Claude Opus 4.7 and Claude Opus 4.8) can advise each other.
18351837
1836**[Claude Fable 5.1](https://platform.claude.com/docs/en/models/fable-5-1/overview) & [Claude Mythos 5.1](https://platform.claude.com/docs/en/models/mythos-5-1/overview)** — *For demanding reasoning and long-horizon agentic work*
1838**[Claude Fable 5.2](https://platform.claude.com/docs/en/models/fable-5-2/overview) & [Claude Mythos 5.2](https://platform.claude.com/docs/en/models/mythos-5-2/overview)** — *For demanding reasoning and long-horizon agentic work*
18371839
18381840**Supported advisor models**
18391841
1840* [Claude Mythos 5.1](https://platform.claude.com/docs/en/models/mythos-5-1/overview) (claude-mythos-5-1)
1841* [Claude Fable 5.1](https://platform.claude.com/docs/en/models/fable-5-1/overview) (claude-fable-5-1)
1842* [Claude Mythos 5.2](https://platform.claude.com/docs/en/models/mythos-5-2/overview) (claude-mythos-5-2)
1843* [Claude Fable 5.2](https://platform.claude.com/docs/en/models/fable-5-2/overview) (claude-fable-5-2)
18421844
18431845**[Claude Opus 5.5](https://platform.claude.com/docs/en/models/opus-5-5/overview)** — *For long-running agentic coding and knowledge work*
18441846
18451847**Supported advisor models**
18461848
1849* [Claude Mythos 5.2](https://platform.claude.com/docs/en/models/mythos-5-2/overview) (claude-mythos-5-2)
1850* [Claude Fable 5.2](https://platform.claude.com/docs/en/models/fable-5-2/overview) (claude-fable-5-2)
18471851* [Claude Mythos 5.1](https://platform.claude.com/docs/en/models/mythos-5-1/overview) (claude-mythos-5-1)
18481852* [Claude Fable 5.1](https://platform.claude.com/docs/en/models/fable-5-1/overview) (claude-fable-5-1)
18491853* [Claude Mythos 5](https://platform.claude.com/docs/en/models/mythos-5/overview) (claude-mythos-5)
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18551859
18561860**Supported advisor models**
18571861
1862* [Claude Mythos 5.2](https://platform.claude.com/docs/en/models/mythos-5-2/overview) (claude-mythos-5-2)
1863* [Claude Fable 5.2](https://platform.claude.com/docs/en/models/fable-5-2/overview) (claude-fable-5-2)
18581864* [Claude Mythos 5.1](https://platform.claude.com/docs/en/models/mythos-5-1/overview) (claude-mythos-5-1)
18591865* [Claude Fable 5.1](https://platform.claude.com/docs/en/models/fable-5-1/overview) (claude-fable-5-1)
18601866* [Claude Mythos 5](https://platform.claude.com/docs/en/models/mythos-5/overview) (claude-mythos-5)
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18671873
18681874**Supported advisor models**
18691875
1876* [Claude Mythos 5.2](https://platform.claude.com/docs/en/models/mythos-5-2/overview) (claude-mythos-5-2)
1877* [Claude Fable 5.2](https://platform.claude.com/docs/en/models/fable-5-2/overview) (claude-fable-5-2)
18701878* [Claude Mythos 5.1](https://platform.claude.com/docs/en/models/mythos-5-1/overview) (claude-mythos-5-1)
18711879* [Claude Fable 5.1](https://platform.claude.com/docs/en/models/fable-5-1/overview) (claude-fable-5-1)
18721880* [Claude Mythos 5](https://platform.claude.com/docs/en/models/mythos-5/overview) (claude-mythos-5)
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18791887* [Claude Sonnet 5](https://platform.claude.com/docs/en/models/sonnet-5/overview) (claude-sonnet-5)
18801888* [Claude Haiku 5.5](https://platform.claude.com/docs/en/models/haiku-5-5/overview) (claude-haiku-5-5)
18811889
1890**[Claude Fable 5.1](https://platform.claude.com/docs/en/models/fable-5-1/overview) & [Claude Mythos 5.1](https://platform.claude.com/docs/en/models/mythos-5-1/overview)**
1891
1892**Supported advisor models**
1893
1894* [Claude Mythos 5.2](https://platform.claude.com/docs/en/models/mythos-5-2/overview) (claude-mythos-5-2)
1895* [Claude Fable 5.2](https://platform.claude.com/docs/en/models/fable-5-2/overview) (claude-fable-5-2)
1896* [Claude Mythos 5.1](https://platform.claude.com/docs/en/models/mythos-5-1/overview) (claude-mythos-5-1)
1897* [Claude Fable 5.1](https://platform.claude.com/docs/en/models/fable-5-1/overview) (claude-fable-5-1)
1898
18821899**[Claude Fable 5](https://platform.claude.com/docs/en/models/fable-5/overview) & [Claude Mythos 5](https://platform.claude.com/docs/en/models/mythos-5/overview)**
18831900
18841901**Supported advisor models**
18851902
1903* [Claude Mythos 5.2](https://platform.claude.com/docs/en/models/mythos-5-2/overview) (claude-mythos-5-2)
1904* [Claude Fable 5.2](https://platform.claude.com/docs/en/models/fable-5-2/overview) (claude-fable-5-2)
18861905* [Claude Mythos 5.1](https://platform.claude.com/docs/en/models/mythos-5-1/overview) (claude-mythos-5-1)
18871906* [Claude Fable 5.1](https://platform.claude.com/docs/en/models/fable-5-1/overview) (claude-fable-5-1)
18881907* [Claude Mythos 5](https://platform.claude.com/docs/en/models/mythos-5/overview) (claude-mythos-5)
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18941913
18951914**Supported advisor models**
18961915
1916* [Claude Mythos 5.2](https://platform.claude.com/docs/en/models/mythos-5-2/overview) (claude-mythos-5-2)
1917* [Claude Fable 5.2](https://platform.claude.com/docs/en/models/fable-5-2/overview) (claude-fable-5-2)
18971918* [Claude Mythos 5.1](https://platform.claude.com/docs/en/models/mythos-5-1/overview) (claude-mythos-5-1)
18981919* [Claude Fable 5.1](https://platform.claude.com/docs/en/models/fable-5-1/overview) (claude-fable-5-1)
18991920* [Claude Mythos 5](https://platform.claude.com/docs/en/models/mythos-5/overview) (claude-mythos-5)
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19051926
19061927**Supported advisor models**
19071928
1929* [Claude Mythos 5.2](https://platform.claude.com/docs/en/models/mythos-5-2/overview) (claude-mythos-5-2)
1930* [Claude Fable 5.2](https://platform.claude.com/docs/en/models/fable-5-2/overview) (claude-fable-5-2)
19081931* [Claude Mythos 5.1](https://platform.claude.com/docs/en/models/mythos-5-1/overview) (claude-mythos-5-1)
19091932* [Claude Fable 5.1](https://platform.claude.com/docs/en/models/fable-5-1/overview) (claude-fable-5-1)
19101933* [Claude Mythos 5](https://platform.claude.com/docs/en/models/mythos-5/overview) (claude-mythos-5)
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19191942
19201943**Supported advisor models**
19211944
1945* [Claude Mythos 5.2](https://platform.claude.com/docs/en/models/mythos-5-2/overview) (claude-mythos-5-2)
1946* [Claude Fable 5.2](https://platform.claude.com/docs/en/models/fable-5-2/overview) (claude-fable-5-2)
19221947* [Claude Mythos 5.1](https://platform.claude.com/docs/en/models/mythos-5-1/overview) (claude-mythos-5-1)
19231948* [Claude Fable 5.1](https://platform.claude.com/docs/en/models/fable-5-1/overview) (claude-fable-5-1)
19241949* [Claude Mythos 5](https://platform.claude.com/docs/en/models/mythos-5/overview) (claude-mythos-5)
from line 1958
19331958
19341959**Supported advisor models**
19351960
1961* [Claude Mythos 5.2](https://platform.claude.com/docs/en/models/mythos-5-2/overview) (claude-mythos-5-2)
1962* [Claude Fable 5.2](https://platform.claude.com/docs/en/models/fable-5-2/overview) (claude-fable-5-2)
19361963* [Claude Mythos 5.1](https://platform.claude.com/docs/en/models/mythos-5-1/overview) (claude-mythos-5-1)
19371964* [Claude Fable 5.1](https://platform.claude.com/docs/en/models/fable-5-1/overview) (claude-fable-5-1)
19381965* [Claude Mythos 5](https://platform.claude.com/docs/en/models/mythos-5/overview) (claude-mythos-5)
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19501977
19511978**Supported advisor models**
19521979
1980* [Claude Mythos 5.2](https://platform.claude.com/docs/en/models/mythos-5-2/overview) (claude-mythos-5-2)
1981* [Claude Fable 5.2](https://platform.claude.com/docs/en/models/fable-5-2/overview) (claude-fable-5-2)
19531982* [Claude Mythos 5.1](https://platform.claude.com/docs/en/models/mythos-5-1/overview) (claude-mythos-5-1)
19541983* [Claude Fable 5.1](https://platform.claude.com/docs/en/models/fable-5-1/overview) (claude-fable-5-1)
19551984* [Claude Mythos 5](https://platform.claude.com/docs/en/models/mythos-5/overview) (claude-mythos-5)
from line 1995
19661995
19671996**Supported advisor models**
19681997
1998* [Claude Mythos 5.2](https://platform.claude.com/docs/en/models/mythos-5-2/overview) (claude-mythos-5-2)
1999* [Claude Fable 5.2](https://platform.claude.com/docs/en/models/fable-5-2/overview) (claude-fable-5-2)
19692000* [Claude Mythos 5.1](https://platform.claude.com/docs/en/models/mythos-5-1/overview) (claude-mythos-5-1)
19702001* [Claude Fable 5.1](https://platform.claude.com/docs/en/models/fable-5-1/overview) (claude-fable-5-1)
19712002* [Claude Mythos 5](https://platform.claude.com/docs/en/models/mythos-5/overview) (claude-mythos-5)
from line 2015
19842015
19852016**Supported advisor models**
19862017
2018* [Claude Mythos 5.2](https://platform.claude.com/docs/en/models/mythos-5-2/overview) (claude-mythos-5-2)
2019* [Claude Fable 5.2](https://platform.claude.com/docs/en/models/fable-5-2/overview) (claude-fable-5-2)
19872020* [Claude Mythos 5.1](https://platform.claude.com/docs/en/models/mythos-5-1/overview) (claude-mythos-5-1)
19882021* [Claude Fable 5.1](https://platform.claude.com/docs/en/models/fable-5-1/overview) (claude-fable-5-1)
19892022* [Claude Mythos 5](https://platform.claude.com/docs/en/models/mythos-5/overview) (claude-mythos-5)
from line 2072
20392072* Availability: Available
20402073* Usage: Add an advisor tool (type `advisor_20260301`) with the advisor model to the request’s `tools`. It takes `max_uses`, `max_tokens` and caching options.
20412074
2042| Status | Cloud platforms | Models |
2043| ------ | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
2044| Beta | Claude API, [Claude Platform on AWS](https://platform.claude.com/docs/en/build-with-claude/claude-platform-on-aws), [Claude Models on Google Cloud (Anthropic managed)](https://platform.claude.com/docs/en/build-with-claude/claude-models-on-google-cloud/anthropic-managed) | [Claude Fable 5.1](https://platform.claude.com/docs/en/models/fable-5-1/overview), [Claude Mythos 5.1](https://platform.claude.com/docs/en/models/mythos-5-1/overview), [Claude Fable 5](https://platform.claude.com/docs/en/models/fable-5/overview), [Claude Mythos 5](https://platform.claude.com/docs/en/models/mythos-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 Haiku 5.5](https://platform.claude.com/docs/en/models/haiku-5-5/overview), [Claude Haiku 4.5](https://platform.claude.com/docs/en/models/haiku-4-5/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 Opus 4.6](https://platform.claude.com/docs/en/models/opus-4-6/overview), [Claude Sonnet 4.6](https://platform.claude.com/docs/en/models/sonnet-4-6/overview) |
2075| Status | Cloud platforms | Models |
2076| ------ | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
2077| Beta | Claude API, [Claude Platform on AWS](https://platform.claude.com/docs/en/build-with-claude/claude-platform-on-aws), [Claude Models on Google Cloud (Anthropic managed)](https://platform.claude.com/docs/en/build-with-claude/claude-models-on-google-cloud/anthropic-managed) | [Claude Fable 5.2](https://platform.claude.com/docs/en/models/fable-5-2/overview), [Claude Mythos 5.2](https://platform.claude.com/docs/en/models/mythos-5-2/overview), [Claude Fable 5.1](https://platform.claude.com/docs/en/models/fable-5-1/overview), [Claude Mythos 5.1](https://platform.claude.com/docs/en/models/mythos-5-1/overview), [Claude Fable 5](https://platform.claude.com/docs/en/models/fable-5/overview), [Claude Mythos 5](https://platform.claude.com/docs/en/models/mythos-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 Haiku 5.5](https://platform.claude.com/docs/en/models/haiku-5-5/overview), [Claude Haiku 4.5](https://platform.claude.com/docs/en/models/haiku-4-5/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 Opus 4.6](https://platform.claude.com/docs/en/models/opus-4-6/overview), [Claude Sonnet 4.6](https://platform.claude.com/docs/en/models/sonnet-4-6/overview) |
20452078
20462079#### [Managed Agents](https://platform.claude.com/docs/en/managed-agents/overview)
20472080
from line 2081
20482081* Availability: Available
20492082* Usage: Set `advisor` to `{"type": "enabled", "model": …}` in the agent’s `multiagent` block. There are no `max_uses`, `max_tokens` or caching options, and advice arrives as thread events on the session’s event stream.
20502083
2051| Status | Cloud platforms | Models |
2052| ------ | ------------------------------------------------------------------------------------------------------------------ | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
2053| Beta | Claude API, [Claude Platform on AWS](https://platform.claude.com/docs/en/build-with-claude/claude-platform-on-aws) | [Claude Fable 5.1](https://platform.claude.com/docs/en/models/fable-5-1/overview), [Claude Mythos 5.1](https://platform.claude.com/docs/en/models/mythos-5-1/overview), [Claude Fable 5](https://platform.claude.com/docs/en/models/fable-5/overview), [Claude Mythos 5](https://platform.claude.com/docs/en/models/mythos-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 Haiku 5.5](https://platform.claude.com/docs/en/models/haiku-5-5/overview), [Claude Haiku 4.5](https://platform.claude.com/docs/en/models/haiku-4-5/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 Opus 4.6](https://platform.claude.com/docs/en/models/opus-4-6/overview), [Claude Sonnet 4.6](https://platform.claude.com/docs/en/models/sonnet-4-6/overview) |
2084| Status | Cloud platforms | Models |
2085| ------ | ------------------------------------------------------------------------------------------------------------------ | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
2086| Beta | Claude API, [Claude Platform on AWS](https://platform.claude.com/docs/en/build-with-claude/claude-platform-on-aws) | [Claude Fable 5.2](https://platform.claude.com/docs/en/models/fable-5-2/overview), [Claude Mythos 5.2](https://platform.claude.com/docs/en/models/mythos-5-2/overview), [Claude Fable 5.1](https://platform.claude.com/docs/en/models/fable-5-1/overview), [Claude Mythos 5.1](https://platform.claude.com/docs/en/models/mythos-5-1/overview), [Claude Fable 5](https://platform.claude.com/docs/en/models/fable-5/overview), [Claude Mythos 5](https://platform.claude.com/docs/en/models/mythos-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 Haiku 5.5](https://platform.claude.com/docs/en/models/haiku-5-5/overview), [Claude Haiku 4.5](https://platform.claude.com/docs/en/models/haiku-4-5/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 Opus 4.6](https://platform.claude.com/docs/en/models/opus-4-6/overview), [Claude Sonnet 4.6](https://platform.claude.com/docs/en/models/sonnet-4-6/overview) |
20542087
20552088### Required beta headers
20562089
No line in this hunk matches that.