# Claude Fable 5.2 and Mythos 5.2

Canonical HTML: [Read this page on Rising](https://rising.dev/models/claude-fable-mythos-5-2/)

Anthropic · Hosted

Announced 9 Nov 2026 · Reviewed 10 Nov 2026

Anthropic presents Fable 5.2 and Mythos 5.2 as configurations of one underlying model. Fable applies cybersecurity and biology safeguards; Mythos access is restricted to eligible organizations.

- Reviewed tasks: Coding, Knowledge work, Research
- Reviewed modalities: Unknown
- Deployment paths: Hosted API, Provider app
- Focus / inputs: Not independently verified for both configurations.
- Availability / restrictions: Fable 5.2 is available through the Claude Platform, AWS, Google Cloud and Microsoft Azure. Eligible organizations can apply for Mythos through Cyber or Life Sciences verification; Claude Enterprise customers can use Mythos through Claude Security.
- Licence category: Unknown
- Licence / terms: No model-specific licence or weight-release terms verified.

## Variants, limits and list prices

Values are copied from the linked first-party pages as stated, with the date each group was checked. Unknown means the pages checked do not state the value. Prices are list prices, not a quote or a ranking.

### Claude Fable 5.2

- API identifier: `claude-fable-5-2`
- Released: Unknown
- Status and retirement: Available on Claude Platform, AWS, Google Cloud and Microsoft Azure.
- Lifecycle checked: Checked 10 Nov 2026
- Context window: Unknown
- Max input: Unknown
- Max output: Unknown
- Rate limits: Unknown
- Limit notes: Unknown
- Limits checked: Checked 10 Nov 2026
- Base input price: 8 USD/MTok (Standard)
- Base output price: 40 USD/MTok (Standard)
- Cache-read price: Unknown
- Price conditions: Standard: input 8 USD/MTok, output 40 USD/MTok. Fast mode: input 16 USD/MTok, output 80 USD/MTok. Fast mode is listed for Claude Code, Claude Platform, Claude Models on Google Cloud (with Anthropic or Google management), and Microsoft Foundry (Anthropic hosting). AWS fast-mode availability is not established.
- Prices checked: Checked 10 Nov 2026
- Knowledge cutoff: Unknown
- Cutoff checked: Checked 10 Nov 2026

### Claude Mythos 5.2

- API identifier: Unknown
- Released: Unknown
- Status and retirement: Unknown
- Lifecycle checked: Checked 10 Nov 2026
- Context window: Unknown
- Max input: Unknown
- Max output: Unknown
- Rate limits: Unknown
- Limit notes: Unknown
- Limits checked: Checked 10 Nov 2026
- Base input price: 8 USD/MTok (Standard)
- Base output price: 40 USD/MTok (Standard)
- Cache-read price: Unknown
- Price conditions: Standard: input 8 USD/MTok, output 40 USD/MTok. Fast mode: input 16 USD/MTok, output 80 USD/MTok. Fast mode is listed for Claude Code, Claude Platform, Claude Models on Google Cloud (with Anthropic or Google management), and Microsoft Foundry (Anthropic hosting). AWS fast-mode availability is not established. Mythos fast mode additionally requires membership in a Verification Program.
- Prices checked: Checked 10 Nov 2026
- Knowledge cutoff: Unknown
- Cutoff checked: Checked 10 Nov 2026

- Claude Mythos 5.2: Mythos access requires an eligible verification program or Claude Enterprise access to Claude Security; a Mythos API identifier is not established by the announcement.

## Parameters and weights

Unknown: the first-party pages checked publish no parameter count or weights.

## Sources

- [Anthropic announcement](https://www.anthropic.com/claude-fable-and-mythos-5-2)

## More from Anthropic

- [Claude Haiku 5.5](https://rising.dev/models/claude-haiku-5-5/)
- [Claude Sonnet 5.5](https://rising.dev/models/claude-sonnet-5-5/)
- [Claude Opus 5.5](https://rising.dev/models/claude-opus-5-5/)
- [Claude Fable 5.1 and Mythos 5.1](https://rising.dev/models/claude-fable-mythos-5-1/)

[Release entry](https://rising.dev/changes/#claude-fable-mythos-5-2-release) · [Back to the model list](https://rising.dev/models/#claude-fable-mythos-5-2) · [Compare Claude Fable 5.2 and Mythos 5.2 with other models](https://rising.dev/models/?compare=claude-fable-mythos-5-2#comparison-title)