50 pages for fable.

prompting-claude-fable-5 Claude Developer Platform · title build-with-claude/prompt-engineering/prompting-claude-fable-5 whats-new-fable-5-1 Claude Developer Platform · title models/fable-5-1/whats-new-fable-5-1 introducing-claude-fable-5-and-claude-mythos-5 Claude Developer Platform · title models/fable-5/introducing-claude-fable-5-and-claude-mythos-5 claude-fable-5 Claude Developer Platform · title release-notes/system-prompts/claude-fable-5 claude-fable-5-1 Claude Developer Platform · title release-notes/system-prompts/claude-fable-5-1 Delivering work Claude Developer Platform · path build-with-claude/prompt-engineering/prompting-claude-fable-5-1 Or, for the Project Glasswing model with the same capabilities: Claude Developer Platform · path models/fable-5-1/migration-guide overview Claude Developer Platform · path models/fable-5-1/overview Or, for the model with the same capabilities and no access approval requirement: Claude Developer Platform · path models/fable-5/migration-guide overview Claude Developer Platform · path models/fable-5/overview model-deprecations Claude Developer Platform · in the page about-claude/model-deprecations …see the [migration guide](https://platform.claude.com/docs/en/models/fable-5/migration-guide#migrating-from-claude-mythos-preview). </Note> Current and recently retired models are listed in the foll… choosing-a-model Claude Developer Platform · in the page about-claude/models/choosing-a-model …uning effort is often a better lever than switching models. On Claude Fable 5.1 and Claude Opus 5, start with the default (`high`) and adjust up or down based on your evals. On Claude Opus 5.5 the def… Or, for the model with the same capabilities and no access approval requirement: Claude Developer Platform · in the page about-claude/models/migration-guide …r those platforms. </Tip> ## Migrating to Claude Mythos 5 and Claude Fable 5 [Claude Fable 5](https://platform.claude.com/docs/en/models/fable-5/introducing-claude-fable-5-and-claude-mythos-5) is An… optimizing-for-cost-and-intelligence Claude Developer Platform · in the page about-claude/models/optimizing-for-cost-and-intelligence …etween 5 minutes and an hour and few gaps run over an hour. On Claude Fable 5.1, keep the 5-minute cache warm while pauses run minutes, and buy the 1-hour duration when pauses run toward an hour | [Pi… pricing Claude Developer Platform · in the page about-claude/pricing …:-------------- | :----------------------- | :------------ | | Claude Fable 5.1 | $… claude-api-skill Claude Developer Platform · in the page agents-and-tools/agent-skills/claude-api-skill …ls/opus-5-5/migration-guide#migrating-from-claude-opus-5) and [Claude Fable 5.1](https://platform.claude.com/docs/en/models/fable-5-1/migration-guide)) * **Current model information:** Model IDs, cont… advisor-tool Claude Developer Platform · in the page agents-and-tools/tool-use/advisor-tool …a higher-tier advisor. Opus keeps total cost similar or lower; Claude Fable 5.1 maximizes the quality lift. * **You currently use Haiku and want a step up in intelligence:** Add an Opus or Fable advis… browser-use-tool Claude Developer Platform · in the page agents-and-tools/tool-use/browser-use-tool …pecific-data-retention-requirements). supportedModels: - claude-fable-5-1 - claude-mythos-5-1 - claude-fable-5 - claude-mythos-5 - claude-opus-5-5 - claude-opus-5 - claud… code-execution-tool Claude Developer Platform · in the page agents-and-tools/tool-use/code-execution-tool …ata: status: ga zdr: not-eligible supportedModels: - claude-fable-5-1 - claude-mythos-5-1 - claude-fable-5 - claude-mythos-5 - claude-opus-5-5 - claude-opus-5 - claud… computer-use-tool Claude Developer Platform · in the page agents-and-tools/tool-use/computer-use-tool …pecific-data-retention-requirements). supportedModels: - claude-fable-5-1 - claude-mythos-5-1 - claude-fable-5 - claude-mythos-5 - claude-opus-5-5 - claude-opus-5 - claud… define-tools Claude Developer Platform · in the page agents-and-tools/tool-use/define-tools …| | Claude Opus 5.5, Claude Fable 5.1, and [Claude Mythos 5.1](https://anthropic.com/glasswing) | `any` and `tool` ret… parallel-tool-use Claude Developer Platform · in the page agents-and-tools/tool-use/parallel-tool-use …me time." ``` </Accordion> </AccordionGroup> <Note> **Claude Fable 5.1 in long agent loops** Claude Fable 5.1 may issue fewer parallel tool calls than earlier models, most noticeably in lo… Process results programmatically Claude Developer Platform · in the page agents-and-tools/tool-use/programmatic-tool-calling …ata: status: ga zdr: not-eligible supportedModels: - claude-fable-5-1 - claude-mythos-5-1 - claude-fable-5 - claude-mythos-5 - claude-opus-5-5 - claude-opus-5 - claud… tool-search-tool Claude Developer Platform · in the page agents-and-tools/tool-use/tool-search-tool …---------------------------------------------------------- | | Claude Fable 5.1 (claude-fable-5-1) | `tool_search_tool_regex_20251119`, `tool_search_tool_bm25_20251119` | | Claude Mythos 5.… web-fetch-tool Claude Developer Platform · in the page agents-and-tools/tool-use/web-fetch-tool …ntaining response quality. Dynamic filtering is available with Claude Fable 5.1, Claude Mythos 5.1, Claude Fable 5, Claude Mythos 5, [Claude Mythos Preview](https://anthropic.com/glasswing), Claude Op… Beta Claude Developer Platform · in the page api/beta …overview) for additional details and options. - `"claude-fable-5-1" or "claude-mythos-5-1" or "claude-sonnet-5" or 14 more` The model that will complete your prompt.… Agents Claude Developer Platform · in the page api/beta/agents …ditional configuration control - `BetaManagedAgentsModel = "claude-fable-5-1" or "claude-sonnet-5" or "claude-fable-5" or 11 more or string` The model that will power your agent. See [mod… Archive Agent Claude Developer Platform · in the page api/beta/agents/archive …odels-overview) for additional details and options. - `"claude-fable-5-1" or "claude-sonnet-5" or "claude-fable-5" or 11 more` The model that will power your agent. See [model… Create Agent Claude Developer Platform · in the page api/beta/agents/create …ditional configuration control - `BetaManagedAgentsModel = "claude-fable-5-1" or "claude-sonnet-5" or "claude-fable-5" or 11 more or string` The model that will power your agent. See [mod… List Agents Claude Developer Platform · in the page api/beta/agents/list …odels-overview) for additional details and options. - `"claude-fable-5-1" or "claude-sonnet-5" or "claude-fable-5" or 11 more` The model that will power your agent. See [model… Get Agent Claude Developer Platform · in the page api/beta/agents/retrieve …odels-overview) for additional details and options. - `"claude-fable-5-1" or "claude-sonnet-5" or "claude-fable-5" or 11 more` The model that will power your agent. See [model… Update Agent Claude Developer Platform · in the page api/beta/agents/update …o preserve. Cannot be cleared. - `BetaManagedAgentsModel = "claude-fable-5-1" or "claude-sonnet-5" or "claude-fable-5" or 11 more or string` The model that will power your agent. See [mod… Versions Claude Developer Platform · in the page api/beta/agents/versions …odels-overview) for additional details and options. - `"claude-fable-5-1" or "claude-sonnet-5" or "claude-fable-5" or 11 more` The model that will power your agent. See [model… List Agent Versions Claude Developer Platform · in the page api/beta/agents/versions/list …odels-overview) for additional details and options. - `"claude-fable-5-1" or "claude-sonnet-5" or "claude-fable-5" or 11 more` The model that will power your agent. See [model… Messages Claude Developer Platform · in the page api/beta/messages …overview) for additional details and options. - `"claude-fable-5-1" or "claude-mythos-5-1" or "claude-sonnet-5" or 14 more` The model that will complete your prompt.… Batches Claude Developer Platform · in the page api/beta/messages/batches …view) for additional details and options. - `"claude-fable-5-1" or "claude-mythos-5-1" or "claude-sonnet-5" or 14 more` The model that will complete your prompt.… Create a Message Batch Claude Developer Platform · in the page api/beta/messages/batches/create …view) for additional details and options. - `"claude-fable-5-1" or "claude-mythos-5-1" or "claude-sonnet-5" or 14 more` The model that will complete your prompt.… Retrieve Message Batch results Claude Developer Platform · in the page api/beta/messages/batches/results …view) for additional details and options. - `"claude-fable-5-1" or "claude-mythos-5-1" or "claude-sonnet-5" or 14 more` The model that will complete your prompt.… Count tokens in a Message Claude Developer Platform · in the page api/beta/messages/count_tokens …overview) for additional details and options. - `"claude-fable-5-1" or "claude-mythos-5-1" or "claude-sonnet-5" or 14 more` The model that will complete your prompt.… Create a Message Claude Developer Platform · in the page api/beta/messages/create …overview) for additional details and options. - `"claude-fable-5-1" or "claude-mythos-5-1" or "claude-sonnet-5" or 14 more` The model that will complete your prompt.… Sessions Claude Developer Platform · in the page api/beta/sessions …to use the agent's model. - `BetaManagedAgentsModel = "claude-fable-5-1" or "claude-sonnet-5" or "claude-fable-5" or 11 more or string` The model that will power your agent.… Archive Session Claude Developer Platform · in the page api/beta/sessions/archive …els-overview) for additional details and options. - `"claude-fable-5-1" or "claude-sonnet-5" or "claude-fable-5" or 11 more` The model that will power your agent. See [m… Create Session Claude Developer Platform · in the page api/beta/sessions/create …to use the agent's model. - `BetaManagedAgentsModel = "claude-fable-5-1" or "claude-sonnet-5" or "claude-fable-5" or 11 more or string` The model that will power your agent.… Events Claude Developer Platform · in the page api/beta/sessions/events …s-overview) for additional details and options. - `"claude-fable-5-1" or "claude-sonnet-5" or "claude-fable-5" or 11 more` The model that will power your agent. Se… List Events Claude Developer Platform · in the page api/beta/sessions/events/list …s-overview) for additional details and options. - `"claude-fable-5-1" or "claude-sonnet-5" or "claude-fable-5" or 11 more` The model that will power your agent. Se… Stream Events Claude Developer Platform · in the page api/beta/sessions/events/stream …s-overview) for additional details and options. - `"claude-fable-5-1" or "claude-sonnet-5" or "claude-fable-5" or 11 more` The model that will power your agent. Se… List Sessions Claude Developer Platform · in the page api/beta/sessions/list …els-overview) for additional details and options. - `"claude-fable-5-1" or "claude-sonnet-5" or "claude-fable-5" or 11 more` The model that will power your agent. See [m… Get Session Claude Developer Platform · in the page api/beta/sessions/retrieve …els-overview) for additional details and options. - `"claude-fable-5-1" or "claude-sonnet-5" or "claude-fable-5" or 11 more` The model that will power your agent. See [m… Threads Claude Developer Platform · in the page api/beta/sessions/threads …s-overview) for additional details and options. - `"claude-fable-5-1" or "claude-sonnet-5" or "claude-fable-5" or 11 more` The model that will power your agent. Se… Archive Session Thread Claude Developer Platform · in the page api/beta/sessions/threads/archive …s-overview) for additional details and options. - `"claude-fable-5-1" or "claude-sonnet-5" or "claude-fable-5" or 11 more` The model that will power your agent. Se…