How to Access Claude Fable 5.2: Who Can Use It?

According to Anthropic's product page, Claude Fable 5.2 is available to Claude Pro, Max, Ultra, Team and Enterprise users; for developers the API model ID is claude-fable-5-2, and the model is offered on Claude Platform, Amazon Web Services, Google Cloud and Microsoft Foundry. Anthropic released the model on November 9, 2026. Its unprotected sibling, Claude Mythos 5.2, is closed to general access and open only to verified organizations.

This post is a news roundup and compilation; I have not tested the model. The plan, platform and ID details come from Anthropic's announcement, product and documentation pages; this is not independent verification. Sources are at the end. For what the model is, see What Is Claude Fable 5.2; for prices, see pricing, cost and effort levels.

Short answer

To use it through a subscription you need a Pro, Max, Ultra, Team or Enterprise plan. To use it in code, you call the claude-fable-5-2 ID on the Claude API, Amazon Bedrock, Google Cloud or Microsoft Foundry. If you need Mythos 5.2, you must be verified through the Cyber Verification Program or the Life Sciences Verification Program.

With Claude plans

Fable 5.2 is available on Pro, Max, Ultra, Team and Enterprise plans. A free plan is not mentioned on Anthropic's pages, so I am not saying it is available there.

For the launch, Anthropic announced a promotion: subscribers on eligible paid plans get one to three Fable resets, depending on how long they have subscribed. On Pro plans and standard Team seats, Fable is included up to 50% of the weekly usage limit. Check the announcement page for exactly how resets work and for the limit numbers; I am only relaying the two sentences above.

Fable 5.2 is available in the Claude apps on all platforms. The default effort level in the Claude apps and in Claude Code is Medium. In the API the default is high. How effort levels affect cost is covered in the pricing post.

Claude Code and Cowork

Fable 5.2 is also available in Claude Code and Cowork. On the command line you can pick the model with --model claude-fable-5-2. Long, multi-step coding work is the area Anthropic positions the model for: the documentation describes it as "for demanding reasoning and long-horizon agentic work." For the examples Anthropic highlights, see what Claude Fable 5.2 can do.

API and cloud

The model ID is not the same everywhere. The IDs from Anthropic's documentation:

Platform	Model ID
Claude API	claude-fable-5-2
Amazon Bedrock (bedrock-runtime)	global.anthropic.claude-fable-5-2 or us.anthropic.claude-fable-5-2
Claude Platform on AWS	claude-fable-5-2
Google Cloud (Google-managed and Anthropic-managed)	claude-fable-5-2
Microsoft Foundry	claude-fable-5-2
Microsoft Foundry, fast mode	claude-fable-5-2-fast

There is a small naming mismatch: the announcement page says "Microsoft Azure," while the product page and the developer documentation say "Microsoft Foundry." The ID table is from the documentation, so I used the Foundry name.

Technical profile: a 1M-token context window, up to 128K output tokens on the synchronous Messages API, text and image input, text output. The documentation lists the status as "Active (latest)," and the model is not retired before November 9, 2027 at the earliest. If you are coming from Fable 5.1, there are breaking changes; I collected them in migrating from Fable 5.1 to 5.2.

The Batch API 300k output beta is not available on Fable 5.2.

Where fast mode is available

According to Anthropic, fast mode speeds up generation by "up to 2.5x" and costs twice the standard price. It is available in:

• Claude Code
• Claude Platform
• Claude Models on Google Cloud
• Microsoft Foundry

Fast mode works only on the Messages API, on the Claude API, Google Cloud and Microsoft Foundry (Anthropic-hosted). It is not listed for Amazon Bedrock or Claude Platform on AWS. Mythos 5.2 fast mode is available only on the Claude API and only to verified organizations.

Access to Mythos 5.2

Claude Mythos 5.2 (claude-mythos-5-2) is closed to general access. According to Anthropic, Fable and Mythos are the same underlying model; Mythos is the version without Fable's specific cybersecurity and biology safeguards. Price and features are the same.

Access goes through one of three routes: an application, the Cyber Verification Program (the same program also covers Opus 5.5, Sonnet 5.5, Mythos 5.1 and future models), or the Life Sciences Verification Program. Anthropic describes Mythos as "our most capable model in cybersecurity engineering," while Fable's safeguards block most cybersecurity tasks. The safeguards and where blocked requests are routed are covered in What Is Claude Fable 5.2.

Claude Enterprise customers can also use Claude Security; according to Anthropic the tool scans a codebase, now runs on Mythos 5.2, and the organization does not need to be in the cyber program.

Data retention

Fable models require 30-day data retention by default; Anthropic ties this to safety monitoring. Zero data retention (ZDR) is possible only if Anthropic explicitly authorizes it. Eligible customers can use Fable 5.2 with ZDR until Enterprise Frontier Safeguards (EFS; a private beta) arrives. This differs from the zero-retention option I described in my Sonnet 5.5 post: for Fable, the default is 30 days. If your team has privacy requirements, clarify this with Anthropic before you choose.

Which route fits whom

Your situation	Suitable route
You want to try it in chat and document work	Claude app (Pro, Max, Ultra, Team, Enterprise)
You will run agents on a codebase	Claude Code, --model claude-fable-5-2
You will embed the model in your app	Claude API, claude-fable-5-2
Your company uses AWS	Amazon Bedrock or Claude Platform on AWS
You are on Google Cloud or Azure	Google Cloud or Microsoft Foundry
Latency matters, cost is secondary	Fast mode (on supported platforms)
You do cyber or life sciences research	Mythos 5.2, through the verification programs
Budget is tight	Compare with Opus 5.5 or Sonnet 5.5

Frequently Asked Questions

Who can access Claude Fable 5.2?

According to Anthropic's product page, Claude Pro, Max, Ultra, Team and Enterprise users. Developers can also reach it through the API with the claude-fable-5-2 ID. A free plan is not mentioned on Anthropic's pages.

Is Claude Fable 5.2 free?

Anthropic does not say it is offered on a free plan. The API charges $8 per million input tokens and $40 per million output tokens; details are in the pricing post.

What is the Fable 5.2 API model ID?

claude-fable-5-2. On Amazon Bedrock it is global.anthropic.claude-fable-5-2 or us.anthropic.claude-fable-5-2. On Microsoft Foundry, fast mode uses claude-fable-5-2-fast.

Does Fable 5.2 work in Claude Code?

Yes, Anthropic lists Claude Code and Cowork among the places to use it. You select it in the CLI with --model claude-fable-5-2. The default effort in Claude Code is Medium.

Is fast mode available on every platform?

No. It is available in Claude Code, Claude Platform, Claude Models on Google Cloud and Microsoft Foundry, and it depends on the Messages API. It is not listed for Bedrock or Claude Platform on AWS.

Can I use Claude Mythos 5.2?

Only verified organizations. Access is requested through an application, the Cyber Verification Program or the Life Sciences Verification Program; it is closed to general access.

Does Fable 5.2 retain my data?

Fable models require 30-day data retention by default. Zero data retention is possible only with Anthropic's explicit authorization and for eligible customers.

Sources

• Anthropic, Claude Fable 5.2 and Claude Mythos 5.2 (November 9, 2026; edit note added November 11): launch promotion, default effort, Claude Security, Mythos access.
• Anthropic, Claude Fable product page: plan list, where it can be used, fast mode, model timeline.
• Anthropic, Models overview: Claude Fable 5.2: model IDs, context and output limits, data retention, status and retirement date.
• Anthropic, What's new in Claude Fable 5.2: fast mode coverage, Batch API note, API changes.