--- title: Claude Fable 5 url: https://platform.claude.com/docs/zh-TW/models/fable-5/overview description: Claude Fable 5 參考資料：生命週期狀態、各平台上的模型 ID、上下文視窗、輸出限制、定價和遷移資源。Claude Fable 5 是舊版模型，而 Claude Fable 5.1 是目前的 Fable 模型。 --- **Legacy.** Released June 9, 2026. Although Claude Fable 5 is still available, you should consider migrating to Claude Fable 5.1. [See Claude Fable 5.1](https://platform.claude.com/docs/zh-TW/models/fable-5-1/overview) · [Migrate to Claude Fable 5.1](https://platform.claude.com/docs/zh-TW/models/fable-5-1/migration-guide#migrating-from-claude-fable-5-to-claude-fable-5-1) Model ID: `claude-fable-5` Context window: 1M tokens · Max output: 128K tokens · Input pricing: $10 / MTok · Output pricing: $50 / MTok [Announcement](https://www.anthropic.com/news/claude-fable-5-mythos-5) ## Fable 與 Mythos 的比較 [Claude Mythos 5](https://platform.claude.com/docs/zh-TW/models/mythos-5/overview) 另行提供，用於防禦性網路安全工作流程，且僅供通過 Anthropic 驗證計畫（例如 [Cyber Verification Program](https://support.claude.com/en/articles/14604842)）驗證的組織使用。它與 Claude Fable 5 具有相同的規格和定價。 ## 與目前陣容的比較 | Model | Context | Max output | Price / MTok | Thinking | Default effort | Knowledge cutoff | | :------------------------------------------------------------------------------------- | :------ | :--------- | :----------------- | :------------------- | :------------- | :--------------- | | [Claude Fable 5.1](https://platform.claude.com/docs/zh-TW/models/fable-5-1/overview) | 1M | 128K | $10 / $50 | Adaptive (always on) | `high` | Jun 2026 | | **Claude Fable 5** (this model) | 1M | 128K | $10 / $50 | Adaptive (always on) | `high` | Jan 2026 | | [Claude Opus 5.5](https://platform.claude.com/docs/zh-TW/models/opus-5-5/overview) | 1M | 128K | $4 / $20 | Adaptive (always on) | `medium` | Jun 2026 | | [Claude Sonnet 5.5](https://platform.claude.com/docs/zh-TW/models/sonnet-5-5/overview) | 1M | 128K | $2 / $10 | Adaptive | `high` | Jun 2026 | | [Claude Haiku 5.5](https://platform.claude.com/docs/zh-TW/models/haiku-5-5/overview) | 1M | 128K | From $0.10 / $0.50 | Adaptive | `medium` | Jun 2026 | * **Context:** 1M tokens is roughly 555k words or 2.5M Unicode characters on the current tokenizer (introduced with Claude Opus 4.7); models before it fit about 750k words in 1M tokens. 200k tokens is roughly 150k words. * **Max output:** Synchronous Messages API limit. On the Message Batches API, Claude Opus 5.5, Claude Opus 5, Claude Sonnet 5.5, Claude Sonnet 5, Claude Haiku 5.5, Claude Opus 4.8, Claude Opus 4.7, Claude Opus 4.6, and Claude Sonnet 4.6 support up to 300k output tokens with the output-300k-2026-03-24 beta header. * **Price / MTok:** Input / output, base price per million tokens. Batch API requests are 50% off; prompt caching reads cost 10% of the base input price (2.5% on Claude Fable 5.1 and Claude Mythos 5.1, 5% on Claude Opus 5.5 and Claude Sonnet 5.5). See Pricing for the full list. * **Thinking:** Adaptive thinking lets the model decide how much to think, steered by effort. Extended thinking is the manual budget\_tokens mode on earlier models. * **Default effort:** The effort parameter’s default on the Claude API. Models without a value don’t support the parameter. * **Knowledge cutoff:** Reliable knowledge cutoff: the date through which the model’s knowledge is most extensive and reliable. ## 規格 ### Model IDs | Platform | Model ID | | :-------------------------------------------------------------------------------------------------------- | :------------------------- | | Claude API | `claude-fable-5` | | [Amazon Bedrock](https://platform.claude.com/docs/zh-TW/build-with-claude/claude-in-amazon-bedrock) | `anthropic.claude-fable-5` | | [Google Cloud](https://platform.claude.com/docs/zh-TW/build-with-claude/claude-on-vertex-ai) | `claude-fable-5` | | [Microsoft Foundry](https://platform.claude.com/docs/zh-TW/build-with-claude/claude-in-microsoft-foundry) | `claude-fable-5` | | [Claude Platform on AWS](https://platform.claude.com/docs/zh-TW/build-with-claude/claude-platform-on-aws) | `claude-fable-5` | ### Pricing | Feature | Value | | :---------------------------------------------------------------------------------------- | :------------------------------- | | Input | $10 / MTok | | Output | $50 / MTok | | [5m cache write](https://platform.claude.com/docs/zh-TW/build-with-claude/prompt-caching) | $12.50 / MTok | | [1h cache write](https://platform.claude.com/docs/zh-TW/build-with-claude/prompt-caching) | $20 / MTok | | [Cache read](https://platform.claude.com/docs/zh-TW/build-with-claude/prompt-caching) | $1 / MTok | | [Batch API](https://platform.claude.com/docs/zh-TW/build-with-claude/batch-processing) | 50% discount on input and output | [Full price list](https://platform.claude.com/docs/zh-TW/about-claude/pricing) ### Capabilities | Feature | Value | | :----------------------------------------------------------------------------------------- | :--------------------- | | [Context window](https://platform.claude.com/docs/zh-TW/build-with-claude/context-windows) | 1M tokens | | Max output | 128K tokens | | [Thinking](https://platform.claude.com/docs/zh-TW/build-with-claude/thinking) | Adaptive (always on) | | [Default effort](https://platform.claude.com/docs/zh-TW/build-with-claude/effort) | `high` | | Input → output | Text and images → text | | Reliable knowledge cutoff | Jan 2026 | | Training data cutoff | Jan 2026 | ### Availability | Feature | Value | | :------------------------------------------------------------------------------- | :---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | [Status](https://platform.claude.com/docs/zh-TW/about-claude/model-deprecations) | Active (legacy) | | Released | June 9, 2026 | | Retirement | Not sooner than June 9, 2027 | | Platforms | Claude API, [Amazon Bedrock](https://platform.claude.com/docs/zh-TW/build-with-claude/claude-in-amazon-bedrock), [Google Cloud](https://platform.claude.com/docs/zh-TW/build-with-claude/claude-on-vertex-ai), [Microsoft Foundry](https://platform.claude.com/docs/zh-TW/build-with-claude/claude-in-microsoft-foundry), [Claude Platform on AWS](https://platform.claude.com/docs/zh-TW/build-with-claude/claude-platform-on-aws) | ## 資源 從 Claude Fable 5 遷移至 Claude Fable 5.1 時有哪些變化。 目前的 Fable 模型：概覽、規格和資源。 針對長期和代理式工作的模型專屬提示指南。 使用 `fallbacks` 參數處理分類器拒絕並在另一個 Claude 模型上重試。 ## 參考資料 Claude Fable 5 在 claude.ai 和 Claude 應用程式上使用的系統提示。 Claude Fable 5 和 Claude Mythos 5 的安全評估和部署決策。 完整價格清單，包括批次折扣和提示快取費率。 模型 ID、別名和固定快照的運作方式。 每個 Claude 模型的生命週期狀態和退役承諾。