--- title: Claude Fable 5 url: https://platform.claude.com/docs/zh-CN/models/fable-5/overview description: Claude Fable 5 参考：生命周期状态、各平台上的模型 ID、上下文窗口、输出限制、定价和迁移资源。Claude Fable 5 是旧版模型，Claude Fable 5.1 是当前的 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-CN/models/fable-5-1/overview) · [Migrate to Claude Fable 5.1](https://platform.claude.com/docs/zh-CN/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 与 Mythos 对比 [Claude Mythos 5](https://platform.claude.com/docs/zh-CN/models/mythos-5/overview) 单独面向防御性网络安全工作流提供，仅供通过 Anthropic 验证计划（例如 [Cyber Verification Program](https://support.claude.com/en/articles/14604842)）验证的组织使用。它与 Claude Fable 5 具有相同的规格和定价。 ## 与当前产品阵容的对比 | Model | Context | Max output | Price / MTok | Thinking | Default effort | Knowledge cutoff | | :------------------------------------------------------------------------------------- | :------ | :--------- | :----------------- | :------------------- | :------------- | :--------------- | | [Claude Fable 5.1](https://platform.claude.com/docs/zh-CN/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-CN/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-CN/models/sonnet-5-5/overview) | 1M | 128K | $2 / $10 | Adaptive | `high` | Jun 2026 | | [Claude Haiku 5.5](https://platform.claude.com/docs/zh-CN/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. ## 规格 ### Model IDs | Platform | Model ID | | :-------------------------------------------------------------------------------------------------------- | :------------------------- | | Claude API | `claude-fable-5` | | [Amazon Bedrock](https://platform.claude.com/docs/zh-CN/build-with-claude/claude-in-amazon-bedrock) | `anthropic.claude-fable-5` | | [Google Cloud](https://platform.claude.com/docs/zh-CN/build-with-claude/claude-on-vertex-ai) | `claude-fable-5` | | [Microsoft Foundry](https://platform.claude.com/docs/zh-CN/build-with-claude/claude-in-microsoft-foundry) | `claude-fable-5` | | [Claude Platform on AWS](https://platform.claude.com/docs/zh-CN/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-CN/build-with-claude/prompt-caching) | $12.50 / MTok | | [1h cache write](https://platform.claude.com/docs/zh-CN/build-with-claude/prompt-caching) | $20 / MTok | | [Cache read](https://platform.claude.com/docs/zh-CN/build-with-claude/prompt-caching) | $1 / MTok | | [Batch API](https://platform.claude.com/docs/zh-CN/build-with-claude/batch-processing) | 50% discount on input and output | [Full price list](https://platform.claude.com/docs/zh-CN/about-claude/pricing) ### Capabilities | Feature | Value | | :----------------------------------------------------------------------------------------- | :--------------------- | | [Context window](https://platform.claude.com/docs/zh-CN/build-with-claude/context-windows) | 1M tokens | | Max output | 128K tokens | | [Thinking](https://platform.claude.com/docs/zh-CN/build-with-claude/thinking) | Adaptive (always on) | | [Default effort](https://platform.claude.com/docs/zh-CN/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-CN/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-CN/build-with-claude/claude-in-amazon-bedrock), [Google Cloud](https://platform.claude.com/docs/zh-CN/build-with-claude/claude-on-vertex-ai), [Microsoft Foundry](https://platform.claude.com/docs/zh-CN/build-with-claude/claude-in-microsoft-foundry), [Claude Platform on AWS](https://platform.claude.com/docs/zh-CN/build-with-claude/claude-platform-on-aws) | ## 资源 从 Claude Fable 5 迁移到 Claude Fable 5.1 时会发生哪些变化。 当前的 Fable 模型：概述、规格和资源。 针对长周期和智能体工作的模型特定提示指南。 使用 `fallbacks` 参数处理分类器拒绝并在另一个 Claude 模型上重试。 ## 参考 Claude Fable 5 在 claude.ai 和 Claude 应用上使用的系统提示。 Claude Fable 5 和 Claude Mythos 5 的安全评估和部署决策。 完整价格列表，包括批量折扣和提示缓存费率。 模型 ID、别名和固定快照的工作原理。 每个 Claude 模型的生命周期状态和退役承诺。