advisor-tool changedagents-and-tools/tool-use/advisor-tool
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18121812The 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.
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1814| Executor models | Advisor models |
1815| ------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
1816| Claude Haiku 4.5 (claude-haiku-4-5) | Claude Mythos 5.1 (claude-mythos-5-1) Claude Fable 5.1 (claude-fable-5-1) Claude Mythos 5 (claude-mythos-5) Claude Fable 5 (claude-fable-5) Claude Opus 5.5 (claude-opus-5-5) Claude Opus 5 (claude-opus-5) Claude Opus 4.8 (claude-opus-4-8) Claude Opus 4.7 (claude-opus-4-7) Claude Opus 4.6 (claude-opus-4-6) Claude Sonnet 5.5 (claude-sonnet-5-5) Claude Sonnet 5 (claude-sonnet-5) Claude Sonnet 4.6 (claude-sonnet-4-6) Claude Haiku 5.5 (claude-haiku-5-5) |
1817| Claude Haiku 5.5 (claude-haiku-5-5) | Claude Mythos 5.1 (claude-mythos-5-1) Claude Fable 5.1 (claude-fable-5-1) Claude Mythos 5 (claude-mythos-5) Claude Fable 5 (claude-fable-5) Claude Opus 5.5 (claude-opus-5-5) Claude Opus 5 (claude-opus-5) Claude Opus 4.8 (claude-opus-4-8) Claude Opus 4.7 (claude-opus-4-7) Claude Sonnet 5.5 (claude-sonnet-5-5) Claude Sonnet 5 (claude-sonnet-5) Claude Haiku 5.5 (claude-haiku-5-5) |
1818| Claude Sonnet 4.6 (claude-sonnet-4-6) | Claude Mythos 5.1 (claude-mythos-5-1) Claude Fable 5.1 (claude-fable-5-1) Claude Mythos 5 (claude-mythos-5) Claude Fable 5 (claude-fable-5) Claude Opus 5.5 (claude-opus-5-5) Claude Opus 5 (claude-opus-5) Claude Opus 4.8 (claude-opus-4-8) Claude Opus 4.7 (claude-opus-4-7) Claude Opus 4.6 (claude-opus-4-6) Claude Sonnet 5.5 (claude-sonnet-5-5) Claude Sonnet 5 (claude-sonnet-5) Claude Sonnet 4.6 (claude-sonnet-4-6) Claude Haiku 5.5 (claude-haiku-5-5) |
1819| Claude Sonnet 5 (claude-sonnet-5) | Claude Mythos 5.1 (claude-mythos-5-1) Claude Fable 5.1 (claude-fable-5-1) Claude Mythos 5 (claude-mythos-5) Claude Fable 5 (claude-fable-5) Claude Opus 5.5 (claude-opus-5-5) Claude Opus 5 (claude-opus-5) Claude Opus 4.8 (claude-opus-4-8) Claude Opus 4.7 (claude-opus-4-7) Claude Sonnet 5.5 (claude-sonnet-5-5) Claude Sonnet 5 (claude-sonnet-5) Claude Haiku 5.5 (claude-haiku-5-5) |
1820| Claude Sonnet 5.5 (claude-sonnet-5-5) | Claude Mythos 5.1 (claude-mythos-5-1) Claude Fable 5.1 (claude-fable-5-1) Claude Mythos 5 (claude-mythos-5) Claude Fable 5 (claude-fable-5) Claude Opus 5.5 (claude-opus-5-5) Claude Opus 5 (claude-opus-5) Claude Sonnet 5.5 (claude-sonnet-5-5) |
1821| Claude Opus 4.6 (claude-opus-4-6) | Claude Mythos 5.1 (claude-mythos-5-1) Claude Fable 5.1 (claude-fable-5-1) Claude Mythos 5 (claude-mythos-5) Claude Fable 5 (claude-fable-5) Claude Opus 5.5 (claude-opus-5-5) Claude Opus 5 (claude-opus-5) Claude Opus 4.8 (claude-opus-4-8) Claude Opus 4.7 (claude-opus-4-7) Claude Opus 4.6 (claude-opus-4-6) Claude Sonnet 5.5 (claude-sonnet-5-5) Claude Sonnet 5 (claude-sonnet-5) Claude Haiku 5.5 (claude-haiku-5-5) |
1822| Claude Opus 4.7 (claude-opus-4-7) | Claude Mythos 5.1 (claude-mythos-5-1) Claude Fable 5.1 (claude-fable-5-1) Claude Mythos 5 (claude-mythos-5) Claude Fable 5 (claude-fable-5) Claude Opus 5.5 (claude-opus-5-5) Claude Opus 5 (claude-opus-5) Claude Opus 4.8 (claude-opus-4-8) Claude Opus 4.7 (claude-opus-4-7) Claude Sonnet 5.5 (claude-sonnet-5-5) |
1823| Claude Opus 4.8 (claude-opus-4-8) | Claude Mythos 5.1 (claude-mythos-5-1) Claude Fable 5.1 (claude-fable-5-1) Claude Mythos 5 (claude-mythos-5) Claude Fable 5 (claude-fable-5) Claude Opus 5.5 (claude-opus-5-5) Claude Opus 5 (claude-opus-5) Claude Opus 4.8 (claude-opus-4-8) Claude Opus 4.7 (claude-opus-4-7) Claude Sonnet 5.5 (claude-sonnet-5-5) |
1824| Claude Opus 5 (claude-opus-5) | Claude Mythos 5.1 (claude-mythos-5-1) Claude Fable 5.1 (claude-fable-5-1) Claude Mythos 5 (claude-mythos-5) Claude Fable 5 (claude-fable-5) Claude Opus 5.5 (claude-opus-5-5) Claude Opus 5 (claude-opus-5) |
1825| Claude Opus 5.5 (claude-opus-5-5) | Claude Mythos 5.1 (claude-mythos-5-1) Claude Fable 5.1 (claude-fable-5-1) Claude Mythos 5 (claude-mythos-5) Claude Fable 5 (claude-fable-5) Claude Opus 5.5 (claude-opus-5-5) Claude Opus 5 (claude-opus-5) |
1826| Claude Fable 5 (claude-fable-5) | Claude Mythos 5.1 (claude-mythos-5-1) Claude Fable 5.1 (claude-fable-5-1) Claude Mythos 5 (claude-mythos-5) Claude Fable 5 (claude-fable-5) Claude Opus 5.5 (claude-opus-5-5) Claude Opus 5 (claude-opus-5) |
1827| Claude Mythos 5 (claude-mythos-5) | Claude Mythos 5.1 (claude-mythos-5-1) Claude Fable 5.1 (claude-fable-5-1) Claude Mythos 5 (claude-mythos-5) Claude Fable 5 (claude-fable-5) Claude Opus 5.5 (claude-opus-5-5) Claude Opus 5 (claude-opus-5) |
1828| Claude Fable 5.1 (claude-fable-5-1) | Claude Mythos 5.1 (claude-mythos-5-1) Claude Fable 5.1 (claude-fable-5-1) |
1829| Claude Mythos 5.1 (claude-mythos-5-1) | Claude Mythos 5.1 (claude-mythos-5-1) Claude Fable 5.1 (claude-fable-5-1) |
1814| Executor models | Advisor models |
1815| ------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
1816| Claude Haiku 4.5 (claude-haiku-4-5) | Claude Mythos 5.1 (claude-mythos-5-1)<br />Claude Fable 5.1 (claude-fable-5-1)<br />Claude Mythos 5 (claude-mythos-5)<br />Claude Fable 5 (claude-fable-5)<br />Claude Opus 5.5 (claude-opus-5-5)<br />Claude Opus 5 (claude-opus-5)<br />Claude Opus 4.8 (claude-opus-4-8)<br />Claude Opus 4.7 (claude-opus-4-7)<br />Claude Opus 4.6 (claude-opus-4-6)<br />Claude Sonnet 5.5 (claude-sonnet-5-5)<br />Claude Sonnet 5 (claude-sonnet-5)<br />Claude Sonnet 4.6 (claude-sonnet-4-6)<br />Claude Haiku 5.5 (claude-haiku-5-5) |
1817| Claude Haiku 5.5 (claude-haiku-5-5) | Claude Mythos 5.1 (claude-mythos-5-1)<br />Claude Fable 5.1 (claude-fable-5-1)<br />Claude Mythos 5 (claude-mythos-5)<br />Claude Fable 5 (claude-fable-5)<br />Claude Opus 5.5 (claude-opus-5-5)<br />Claude Opus 5 (claude-opus-5)<br />Claude Opus 4.8 (claude-opus-4-8)<br />Claude Opus 4.7 (claude-opus-4-7)<br />Claude Sonnet 5.5 (claude-sonnet-5-5)<br />Claude Sonnet 5 (claude-sonnet-5)<br />Claude Haiku 5.5 (claude-haiku-5-5) |
1818| Claude Sonnet 4.6 (claude-sonnet-4-6) | Claude Mythos 5.1 (claude-mythos-5-1)<br />Claude Fable 5.1 (claude-fable-5-1)<br />Claude Mythos 5 (claude-mythos-5)<br />Claude Fable 5 (claude-fable-5)<br />Claude Opus 5.5 (claude-opus-5-5)<br />Claude Opus 5 (claude-opus-5)<br />Claude Opus 4.8 (claude-opus-4-8)<br />Claude Opus 4.7 (claude-opus-4-7)<br />Claude Opus 4.6 (claude-opus-4-6)<br />Claude Sonnet 5.5 (claude-sonnet-5-5)<br />Claude Sonnet 5 (claude-sonnet-5)<br />Claude Sonnet 4.6 (claude-sonnet-4-6)<br />Claude Haiku 5.5 (claude-haiku-5-5) |
1819| Claude Sonnet 5 (claude-sonnet-5) | Claude Mythos 5.1 (claude-mythos-5-1)<br />Claude Fable 5.1 (claude-fable-5-1)<br />Claude Mythos 5 (claude-mythos-5)<br />Claude Fable 5 (claude-fable-5)<br />Claude Opus 5.5 (claude-opus-5-5)<br />Claude Opus 5 (claude-opus-5)<br />Claude Opus 4.8 (claude-opus-4-8)<br />Claude Opus 4.7 (claude-opus-4-7)<br />Claude Sonnet 5.5 (claude-sonnet-5-5)<br />Claude Sonnet 5 (claude-sonnet-5)<br />Claude Haiku 5.5 (claude-haiku-5-5) |
1820| Claude Sonnet 5.5 (claude-sonnet-5-5) | Claude Mythos 5.1 (claude-mythos-5-1)<br />Claude Fable 5.1 (claude-fable-5-1)<br />Claude Mythos 5 (claude-mythos-5)<br />Claude Fable 5 (claude-fable-5)<br />Claude Opus 5.5 (claude-opus-5-5)<br />Claude Opus 5 (claude-opus-5)<br />Claude Sonnet 5.5 (claude-sonnet-5-5) |
1821| Claude Opus 4.6 (claude-opus-4-6) | Claude Mythos 5.1 (claude-mythos-5-1)<br />Claude Fable 5.1 (claude-fable-5-1)<br />Claude Mythos 5 (claude-mythos-5)<br />Claude Fable 5 (claude-fable-5)<br />Claude Opus 5.5 (claude-opus-5-5)<br />Claude Opus 5 (claude-opus-5)<br />Claude Opus 4.8 (claude-opus-4-8)<br />Claude Opus 4.7 (claude-opus-4-7)<br />Claude Opus 4.6 (claude-opus-4-6)<br />Claude Sonnet 5.5 (claude-sonnet-5-5)<br />Claude Sonnet 5 (claude-sonnet-5)<br />Claude Haiku 5.5 (claude-haiku-5-5) |
1822| Claude Opus 4.7 (claude-opus-4-7) | Claude Mythos 5.1 (claude-mythos-5-1)<br />Claude Fable 5.1 (claude-fable-5-1)<br />Claude Mythos 5 (claude-mythos-5)<br />Claude Fable 5 (claude-fable-5)<br />Claude Opus 5.5 (claude-opus-5-5)<br />Claude Opus 5 (claude-opus-5)<br />Claude Opus 4.8 (claude-opus-4-8)<br />Claude Opus 4.7 (claude-opus-4-7)<br />Claude Sonnet 5.5 (claude-sonnet-5-5) |
1823| Claude Opus 4.8 (claude-opus-4-8) | Claude Mythos 5.1 (claude-mythos-5-1)<br />Claude Fable 5.1 (claude-fable-5-1)<br />Claude Mythos 5 (claude-mythos-5)<br />Claude Fable 5 (claude-fable-5)<br />Claude Opus 5.5 (claude-opus-5-5)<br />Claude Opus 5 (claude-opus-5)<br />Claude Opus 4.8 (claude-opus-4-8)<br />Claude Opus 4.7 (claude-opus-4-7)<br />Claude Sonnet 5.5 (claude-sonnet-5-5) |
1824| Claude Opus 5 (claude-opus-5) | Claude Mythos 5.1 (claude-mythos-5-1)<br />Claude Fable 5.1 (claude-fable-5-1)<br />Claude Mythos 5 (claude-mythos-5)<br />Claude Fable 5 (claude-fable-5)<br />Claude Opus 5.5 (claude-opus-5-5)<br />Claude Opus 5 (claude-opus-5) |
1825| Claude Opus 5.5 (claude-opus-5-5) | Claude Mythos 5.1 (claude-mythos-5-1)<br />Claude Fable 5.1 (claude-fable-5-1)<br />Claude Mythos 5 (claude-mythos-5)<br />Claude Fable 5 (claude-fable-5)<br />Claude Opus 5.5 (claude-opus-5-5)<br />Claude Opus 5 (claude-opus-5) |
1826| Claude Fable 5 (claude-fable-5) | Claude Mythos 5.1 (claude-mythos-5-1)<br />Claude Fable 5.1 (claude-fable-5-1)<br />Claude Mythos 5 (claude-mythos-5)<br />Claude Fable 5 (claude-fable-5)<br />Claude Opus 5.5 (claude-opus-5-5)<br />Claude Opus 5 (claude-opus-5) |
1827| Claude Mythos 5 (claude-mythos-5) | Claude Mythos 5.1 (claude-mythos-5-1)<br />Claude Fable 5.1 (claude-fable-5-1)<br />Claude Mythos 5 (claude-mythos-5)<br />Claude Fable 5 (claude-fable-5)<br />Claude Opus 5.5 (claude-opus-5-5)<br />Claude Opus 5 (claude-opus-5) |
1828| Claude Fable 5.1 (claude-fable-5-1) | Claude Mythos 5.1 (claude-mythos-5-1)<br />Claude Fable 5.1 (claude-fable-5-1) |
1829| Claude Mythos 5.1 (claude-mythos-5-1) | Claude Mythos 5.1 (claude-mythos-5-1)<br />Claude Fable 5.1 (claude-fable-5-1) |
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18311831If you request an invalid pair, the API returns a `400 invalid_request_error` naming the unsupported combination.
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