259 pages for fable.

context-editing Claude Developer Platform · in the page build-with-claude/context-editing …g clearing) are applied in real time. supportedModels: - claude-fable-5-2 - claude-mythos-5-2 - claude-fable-5-1 - claude-mythos-5-1 - claude-fable-5 - claude-mythos-5 -… context-windows Claude Developer Platform · in the page build-with-claude/context-windows …ith-claude/token-counting). ## Context window sizes by model Claude Fable 5.2, Claude Mythos 5.2, Claude Fable 5.1, Claude Mythos 5.1, Claude Fable 5, Claude Mythos 5, Claude Opus 5.5, Claude Opus 5… effort Claude Developer Platform · in the page build-with-claude/effort …pecific-data-retention-requirements). supportedModels: - claude-fable-5-2 - claude-mythos-5-2 - claude-fable-5-1 - claude-mythos-5-1 - claude-fable-5 - claude-mythos-5 -… effort-per-message Claude Developer Platform · in the page build-with-claude/effort-per-message …conversation-output-config-2026-07-01 supportedModels: - claude-fable-5-2 - claude-mythos-5-2 - claude-fable-5-1 - claude-mythos-5-1 - claude-opus-5-5 - claude-opus-5 - c… extended-thinking Claude Developer Platform · in the page build-with-claude/extended-thinking …s include Claude Opus 5.5, Claude Sonnet 5, Claude Sonnet 5.5, Claude Fable 5.2, Claude Fable 5.1, and Claude Haiku 5.5. The mapping is small: remove `budget_tokens`, set `thinking: {type: "adaptive"… fallback-credit Claude Developer Platform · in the page build-with-claude/fallback-credit …026-07-01, fallback-credit-2026-06-01 supportedModels: - claude-fable-5-2 - claude-mythos-5-2 - claude-fable-5-1 - claude-mythos-5-1 - claude-fable-5 - claude-opus-5-5 -… fast-mode Claude Developer Platform · in the page build-with-claude/fast-mode …applies regardless of speed setting. supportedModels: - claude-fable-5-2 - claude-mythos-5-2 - claude-opus-5-5 - claude-opus-5 - claude-opus-4-8 supportedPlatforms: Claude… files Claude Developer Platform · in the page build-with-claude/files …ey reach their configured expiration. supportedModels: - claude-fable-5-2 - claude-mythos-5-2 - claude-fable-5-1 - claude-mythos-5-1 - claude-fable-5 - claude-mythos-5 -… handling-stop-reasons Claude Developer Platform · in the page build-with-claude/handling-stop-reasons …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 an… message-threads Claude Developer Platform · in the page build-with-claude/message-threads …r use of other ZDR eligible features. supportedModels: - claude-fable-5-2 - claude-mythos-5-2 - claude-fable-5-1 - claude-mythos-5-1 - claude-fable-5 - claude-mythos-5 -… mid-conversation-system-messages Claude Developer Platform · in the page build-with-claude/mid-conversation-system-messages …tored server-side after the response. supportedModels: - claude-fable-5-2 - claude-mythos-5-2 - claude-fable-5-1 - claude-mythos-5-1 - claude-fable-5 - claude-mythos-5 -… multilingual-support Claude Developer Platform · in the page build-with-claude/multilingual-support …sh. featureMetadata: status: stable supportedModels: - claude-fable-5-2 - claude-mythos-5-2 - claude-fable-5-1 - claude-mythos-5-1 - claude-fable-5 - claude-mythos-5 -… pdf-support Claude Developer Platform · in the page build-with-claude/pdf-support …pecific-data-retention-requirements). supportedModels: - claude-fable-5-2 - claude-mythos-5-2 - claude-fable-5-1 - claude-mythos-5-1 - claude-fable-5 - claude-mythos-5 -… preserved-thinking Claude Developer Platform · in the page build-with-claude/preserved-thinking …rn. featureMetadata: status: stable supportedModels: - claude-fable-5-2 - claude-mythos-5-2 - claude-fable-5-1 - claude-mythos-5-1 - claude-opus-5-5 - claude-sonnet-5-5… Request 2 caches its request content (not the response) Claude Developer Platform · in the page build-with-claude/prompt-caching …TL and promptly deleted after expiry. supportedModels: - claude-fable-5-2 - claude-mythos-5-2 - claude-fable-5-1 - claude-mythos-5-1 - claude-fable-5 - claude-mythos-5 -… claude-prompting-best-practices Claude Developer Platform · in the page build-with-claude/prompt-engineering/claude-prompting-best-practices …e for prompt engineering with current Claude models, including Claude Fable 5.2, Claude Mythos 5.2, Claude Fable 5.1, Claude Mythos 5.1, Claude Fable 5, Claude Mythos 5, Claude Opus 5.5, Claude Opus 5… prompting-claude-opus-5-5 Claude Developer Platform · in the page build-with-claude/prompt-engineering/prompting-claude-opus-5-5 …action. * **Biology:** The biology safeguards are the same as Claude Fable 5.1’s and are new if you’re coming from Claude Opus 5. Everyday health and educational questions are unaffected. If the biol… refusals-and-fallback Claude Developer Platform · in the page build-with-claude/refusals-and-fallback …cs/en/build-with-claude/refusals-and-fallback description: How Claude Fable models, Claude Opus models, Claude Sonnet 5.5, and Claude Haiku 5.5 return classifier refusals and how to retry refused requ… search-results Claude Developer Platform · in the page build-with-claude/search-results …pecific-data-retention-requirements). supportedModels: - claude-fable-5-2 - claude-mythos-5-2 - claude-fable-5-1 - claude-mythos-5-1 - claude-fable-5 - claude-mythos-5 -… streaming Claude Developer Platform · in the page build-with-claude/streaming …as. featureMetadata: status: stable supportedModels: - claude-fable-5-2 - claude-mythos-5-2 - claude-fable-5-1 - claude-mythos-5-1 - claude-fable-5 - claude-mythos-5 -… structured-outputs Claude Developer Platform · in the page build-with-claude/structured-outputs …hich uses the same grammar pipeline." supportedModels: - claude-fable-5-2 - claude-mythos-5-2 - claude-fable-5-1 - claude-mythos-5-1 - claude-fable-5 - claude-mythos-5 -… task-budgets Claude Developer Platform · in the page build-with-claude/task-budgets …betaHeader: task-budgets-2026-03-13 supportedModels: - claude-fable-5-2 - claude-mythos-5-2 - claude-fable-5-1 - claude-mythos-5-1 - claude-fable-5 - claude-mythos-5 -… thinking Claude Developer Platform · in the page build-with-claude/thinking …pecific-data-retention-requirements). supportedModels: - claude-fable-5-2 - claude-mythos-5-2 - claude-fable-5-1 - claude-mythos-5-1 - claude-fable-5 - claude-mythos-5 -… thinking-steering-and-cost Claude Developer Platform · in the page build-with-claude/thinking-steering-and-cost …u-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… thinking-tool-workflows Claude Developer Platform · in the page build-with-claude/thinking-tool-workflows …pends on the model: * **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:** Forced tool use returns a 400 error. * **Other models:*… thinking-troubleshooting Claude Developer Platform · in the page build-with-claude/thinking-troubleshooting …------ | --------- | ------------------------------------- | | Claude Fable 5.2 | Adaptive only | Always on | `"enabled"`, `"disabled"` | | Claude Mythos… token-counting Claude Developer Platform · in the page build-with-claude/token-counting …Count tokens before sending requests. supportedModels: - claude-fable-5-2 - claude-mythos-5-2 - claude-fable-5-1 - claude-mythos-5-1 - claude-fable-5 - claude-mythos-5 -… vision Claude Developer Platform · in the page build-with-claude/vision …on. featureMetadata: status: stable supportedModels: - claude-fable-5-2 - claude-mythos-5-2 - claude-fable-5-1 - claude-mythos-5-1 - claude-fable-5 - claude-mythos-5 -… working-with-messages Claude Developer Platform · in the page build-with-claude/working-with-messages …alls for generating Claude responses. supportedModels: - claude-fable-5-2 - claude-mythos-5-2 - claude-fable-5-1 - claude-mythos-5-1 - claude-fable-5 - claude-mythos-5 -… API usage primer for Claude Claude Developer Platform · in the page claude_api_primer …ing agentic and research tasks, at 2x Claude Opus 5.5 pricing: Claude Fable 5.2: claude-fable-5-2 Previous Opus model: Claude Opus 5: claude-opus-5 Smart model: Claude Sonnet 5.5: claude-sonnet-5-5 Pr… apple-foundation-models Claude Developer Platform · in the page cli-sdks-libraries/libraries/apple-foundation-models …kage. featureMetadata: status: beta supportedModels: - claude-fable-5-2 - claude-mythos-5-2 - claude-fable-5-1 - claude-mythos-5-1 - claude-fable-5 - claude-mythos-5 -… openai-sdk Claude Developer Platform · in the page cli-sdks-libraries/libraries/openai-sdk …es. featureMetadata: status: stable supportedModels: - claude-fable-5-2 - claude-mythos-5-2 - claude-fable-5-1 - claude-mythos-5-1 - claude-fable-5 - claude-mythos-5 -… middleware Claude Developer Platform · in the page cli-sdks-libraries/middleware …uests and responses. featureMetadata: supportedModels: - claude-fable-5-2 - claude-mythos-5-2 - claude-fable-5-1 - claude-mythos-5-1 - claude-fable-5 - claude-mythos-5 -… home Claude Developer Platform · in the page home …ription="Choose the right model for your use case." /> * [Claude Fable 5.2](https://platform.claude.com/docs/en/models/fable-5-2/overview) (`claude-fable-5-2`) — New — *For demanding reasoning an… intro Claude Developer Platform · in the page intro …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, o… api-and-data-retention Claude Developer Platform · in the page manage-claude/api-and-data-retention …only. * **Claude for Excel:** Not currently ZDR-eligible. * **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-… cmek Claude Developer Platform · in the page manage-claude/cmek …onsole is disabled. * Structured outputs are not available for Claude Fable or Claude Mythos models in CMEK organizations. * Other beta and research preview features might not be covered by CMEK. **C… cmek-coverage-claude-platform Claude Developer Platform · in the page manage-claude/cmek-coverage-claude-platform …| Structured outputs, including `strict: true` on tools, with Claude Fable or Claude Mythos models | Turned off in CMEK organizations. With other models, data that structured outputs st… data-residency Claude Developer Platform · in the page manage-claude/data-residency …pecific-data-retention-requirements). supportedModels: - claude-fable-5-2 - claude-mythos-5-2 - claude-fable-5-1 - claude-mythos-5-1 - claude-fable-5 - claude-mythos-5 -… opentelemetry Claude Developer Platform · in the page manage-claude/opentelemetry …e-claude/opentelemetry status: beta supportedModels: - claude-fable-5-2 - claude-mythos-5-2 - claude-fable-5-1 - claude-mythos-5-1 - claude-fable-5 - claude-mythos-5 -… api Claude Developer Platform · in the page manage-claude/opentelemetry/api …vice's retention and access controls. supportedModels: - claude-fable-5-2 - claude-mythos-5-2 - claude-fable-5-1 - claude-mythos-5-1 - claude-fable-5 - claude-mythos-5 -… sdk Claude Developer Platform · in the page manage-claude/opentelemetry/sdk …e-claude/opentelemetry status: beta supportedModels: - claude-fable-5-2 - claude-mythos-5-2 - claude-fable-5-1 - claude-mythos-5-1 - claude-fable-5 - claude-mythos-5 -… agent-setup Claude Developer Platform · in the page managed-agents/agent-setup …res, including Self-hosted sandboxes. supportedModels: - claude-fable-5-2 - claude-mythos-5-2 - claude-fable-5-1 - claude-mythos-5-1 - claude-fable-5 - claude-mythos-5 -… budgets Claude Developer Platform · in the page managed-agents/budgets …res, including Self-hosted sandboxes. supportedModels: - claude-fable-5-2 - claude-mythos-5-2 - claude-fable-5-1 - claude-mythos-5-1 - claude-fable-5 - claude-mythos-5 -… choosing-an-environment Claude Developer Platform · in the page managed-agents/choosing-an-environment …res, including Self-hosted sandboxes. supportedModels: - claude-fable-5-2 - claude-mythos-5-2 - claude-fable-5-1 - claude-mythos-5-1 - claude-fable-5 - claude-mythos-5 -… cloud-sandboxes-reference Claude Developer Platform · in the page managed-agents/cloud-sandboxes-reference …res, including Self-hosted sandboxes. supportedModels: - claude-fable-5-2 - claude-mythos-5-2 - claude-fable-5-1 - claude-mythos-5-1 - claude-fable-5 - claude-mythos-5 -… DCF Model Rubric Claude Developer Platform · in the page managed-agents/define-outcomes …res, including Self-hosted sandboxes. supportedModels: - claude-fable-5-2 - claude-mythos-5-2 - claude-fable-5-1 - claude-mythos-5-1 - claude-fable-5 - claude-mythos-5 -… dreams Claude Developer Platform · in the page managed-agents/dreams …res, including Self-hosted sandboxes. supportedModels: - claude-fable-5-2 - claude-fable-5-1 - claude-fable-5 - claude-opus-5-5 - claude-opus-5 - claude-sonnet-5-5 - clau… environments Claude Developer Platform · in the page managed-agents/environments …res, including Self-hosted sandboxes. supportedModels: - claude-fable-5-2 - claude-mythos-5-2 - claude-fable-5-1 - claude-mythos-5-1 - claude-fable-5 - claude-mythos-5 -… event-deltas Claude Developer Platform · in the page managed-agents/event-deltas …res, including Self-hosted sandboxes. supportedModels: - claude-fable-5-2 - claude-mythos-5-2 - claude-fable-5-1 - claude-mythos-5-1 - claude-fable-5 - claude-mythos-5 -…