Claude Fable 5 API
Claude Fable 5 is Anthropic's Mythos-class model for long, demanding work: large codebases, dense documents, charts and multi-step research.
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What Claude Fable 5 is good for
Claude Fable 5 is Anthropic's generally available Mythos-class model, designed to keep its bearings through long projects with many stages, planning, checking and revising its own work as it goes. Its one-million-token context window can hold whole repositories or a large stack of research, and it reads screenshots, charts, tables and PDFs. It suits heavy coding, deep research and long content projects that need sustained focus.
- Planning a full video series from a long brief and a stack of research
- Checking whether a built web page matches its design mockup
- Large code migrations, refactors and test writing across many files
- Research summaries that pull together PDFs, tables and charts
- Long scripts that must follow a detailed style guide
Claude Fable 5 pricing
| Option | Price, USD | Video Blade tokens |
|---|---|---|
| Input | tokens | |
| Output | tokens |
Prices are per 1M text tokens (about 750,000 words of model text) and live from our price list. Tokens are held when a run starts and settled to what was actually used; a failed run costs nothing.
Claude Fable 5 is coming soon to Video Blade
It is listed with its live price so you can compare it. You can't order it through Video Blade yet.
Claude Fable 5 FAQ
How much does Claude Fable 5 cost?
1M text tokens from . Prices are live from our price list, and you see the exact price before anything runs.
How is Claude Fable 5 related to Claude Mythos 5?
Both are built on the same underlying model. Fable 5 is the edition Anthropic opened to general use, with extra protections in place, while Mythos 5 stays within restricted, trusted-access programs for approved uses, where some of those protections are relaxed. For most professional work, Fable 5 is the widely available way to get Mythos-class ability.
Why might Claude Fable 5 hand a request to another model?
Its safeguards cover a few sensitive areas: cybersecurity, biology and chemistry, and model distillation. Requests in those areas may be answered by a different model, such as Claude Opus 4.8, rather than by Fable 5 itself. Most content and planning work never comes near those topics, but it matters if a project does.
Can I use Claude Fable 5 on Video Blade today?
Not yet. Claude Fable 5 is listed with its live price so you can compare it with the models you can use today; ordering it through Video Blade is coming soon.
How is Claude Fable 5 billed?
Per million text tokens of the model, with separate rates for the text you send and the text you get back. Tokens are held when a run starts and settled to what was actually used; a failed run costs nothing. Current prices are shown on this page.
Claude Fable 5 in the Video Blade API
claude-claude-fable-5Ordering this model through the API is coming soon.