Claude Fable 5.2
Anthropic launched Claude Fable 5.2 and Claude Mythos 5.2, the same model, at $8 per million input tokens and $40 per million output tokens, 20% below version 5.1.
Fable 5.2 improves on 5.1 in coding, reasoning and vision, communicates more clearly, and generates output up to 30% faster. Mythos 5.2 is the same underlying model offered only to organizations verified through Anthropic's Cyber and Life Sciences Verification Programs, while Fable carries cybersecurity and biology safeguards so it can go to all users. An optional fast mode raises output speed up to 2.5 times at $16 and $80 per million tokens.
- Date
- Monday 9 November 2026
- Lab
- Anthropic
- Kind
- model
- Access
- closed API
- Price
- $8 per MTok input, $40 per MTok output (fast mode $16 / $80)
Figures
| Measure | Value | Measured by |
|---|---|---|
| Input price | $8 per MTok down from $10 for Fable 5.1 | company |
| Output price | $40 per MTok down from $50 for Fable 5.1 | company |
| Context window | 1M tokens 128k max output | company |
| Output speed vs 5.1 | up to 30% faster | company |
| Fast mode speed | up to 2.5x output tokens per second $16 input / $80 output per MTok | company |
| Chartography at Medium effort | 66.4% ahead of Opus 5.5 at Max effort (64.4%) | company |
Available on the Claude API, AWS, Google Cloud, Amazon Bedrock and Microsoft Foundry, and on paid Claude plans. Mythos 5.2 is restricted to verified organizations.
Sources
- anthropic.com/claude-fable-and-mythos-5-2
- docs.claude.com/en/release-notes/overview
- techmeme.com/261109/p40#a261109p40
- resultsense.com/news/2026-11-10-claude-fable-mythos-5-2-launch/
- invezz.com/nz/news/2026/11/10/anthropic-releases-new-cheaper-and-faster-claude-models-ahea
This record was checked against its sources on 9 November 2026. How we check