Anthropic: Claude Fable Latest

This model always redirects to the latest model in the Claude Fable family.

The Claude Fable Latest documentation on OpenRouter includes the Claude Fable 5.1 Migration Guide cookbook. The quickstart covers API keys and your first request, and the API reference lists every parameter.

Claude Fable Latest has no fixed price of its own. Each request is billed at the price of the model that serves it, so your cost depends on which model the request is routed to.

Claude Fable Latest can route to models with context windows of up to 1,000,000 tokens. The context length available to a request is that of the model that serves it.

Claude Fable Latest accepts text, images, and files such as PDFs as input and returns text.

Claude Haiku 5.5, Claude Sonnet 5.5, Claude Opus 5.5 and 12 more are other text models from Anthropic.

Claude Fable Latest was released on June 9, 2026.