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by Anthropic

Anthropic: Claude Fable 5.

multimodal closed 1M ctx
Cheapest input
$10.0/M
on OpenRouter
Cheapest output
$50.0/M
on OpenRouter
Hosted equiv.
~$18.0/hr
@ 100 tok/s on OpenRouter

Claude Fable 5 is a Mythos-class model from Anthropic, built for autonomous knowledge work and coding. It supports text, image, and file inputs with text output, with reasoning support and...

Hosted API only

No self-host path — closed weights.

Anthropic: Claude Fable 5's weights aren't published. Use it via the access providers below.

Where to use it

Cheapest hosted endpoints.

Provider Access $/M in $/M out
OpenRouter api aggregator $10.0 $50.0 Launch ↗
FAQ

Frequently asked.

How do I run Anthropic: Claude Fable 5?
Anthropic: Claude Fable 5 is a closed-source API model. The cheapest way to access it is through the API providers listed on this page (direct API, aggregators, and hosted chat UIs).
Where can I access Anthropic: Claude Fable 5?
Anthropic: Claude Fable 5 is available via OpenRouter. Each access option lists its own pricing (per million tokens or hourly hosting).
How much does it cost to run Anthropic: Claude Fable 5?
API pricing starts at $10.0/M input tokens and $50.0/M output tokens. Self-hosting cost depends on the GPU you rent — see the Run It Yourself tab.
Is Anthropic: Claude Fable 5 open-source or proprietary?
Anthropic: Claude Fable 5 is a proprietary model from Anthropic. Access is API-only — there are no public weights to download.