Claude Fable 5 · LHQ 的网络日志

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 · Migrate 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

Fable 与 Mythos 对比

Claude Mythos 5 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）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	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	1M	128K	$4 / $20	Adaptive (always on)	`medium`	Jun 2026
Claude Sonnet 5.5	1M	128K	$2 / $10	Adaptive	`high`	Jun 2026
Claude Haiku 5.5	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.

Platform	Model ID
Claude API	`claude-fable-5`
Amazon Bedrock	`anthropic.claude-fable-5`
Claude Models on Google Cloud (Google managed)	`claude-fable-5`
Microsoft Foundry	`claude-fable-5`
Claude Platform on AWS	`claude-fable-5`
Claude Models on Google Cloud (Anthropic managed)	`claude-fable-5`

Feature	Value
Status	Active (legacy)
Released	June 9, 2026
Retirement	Not sooner than June 9, 2027
Platforms	Claude API, Amazon Bedrock, Claude Models on Google Cloud (Google managed), Microsoft Foundry, Claude Platform on AWS, Claude Models on Google Cloud (Anthropic managed)