This catalogue entry is an alias: a name that points at another model rather than a model of its own. Its serving contract is listed below; the identity evidence lives on the record of the model it serves.
| Signal | Result | Reference |
|---|---|---|
| Tokenizer signature | Not measured | – |
| API surface | Identical contract to 1 other entry | api_225f0dab |
| Context and output | 1,000,000 context · 128,000 max output | declared |
| Reasoning contract | Mandatory · efforts max, xhigh, high, medium, low · default high | declared |
| Serving providers observed | None recorded yet | – |
This model always redirects to the latest model in the Claude Fable family.
Supported parameters
include_reasoningmax_completion_tokensmax_tokensreasoningreasoning_effortresponse_formatstopstructured_outputstool_choicetoolsverbosity
defaults: {"temperature":null,"top_p":null,"top_k":null,"frequency_penalty":null,"presence_penalty":null,"repetition_penalty":null}
Cite this page as the evidence record for Anthropic: Claude Fable Latest: the URL is stable, measurements are dated, and revisions append to the history above. Method: tokenizer fingerprinting, v1, 50 strings. The raw data behind every figure is on the data page.
