ImprovementModels ·
Fable returns, and Claude 5 Sonnet joins
Try in the builder
Create an agent or open an existing agent in the builder, then follow the steps below. Model and feature availability may depend on your plan.
What it does
Claude Fable came back to the model list alongside Claude 5 Sonnet.
Before this
One return and one addition. Fable had been in the selector before and was taken out; this brought it back. Claude 5 Sonnet was new, replacing 4.6 Sonnet as the everyday Anthropic option.
Why it matters
Fable is the one to pick when tone and narrative voice matter more than raw reasoning; Sonnet is the everyday workhorse.
The specs
- Claude Fable
- Anthropic's writing model, tuned for tone, character, and long-form prose. 999,000-token context, 128,000-token output.
- Claude 5 Sonnet
- The everyday workhorse: same 999,000-token context and 128,000-token output, faster and cheaper than Opus.
- Shared
- Both read text and images, support Actions, and offer Fast ($$) through Smartest ($$$$) reasoning.
- Plans
- Gold and Pro.
Fable is the unusual one. Most model choices trade reasoning against cost; Fable trades reasoning against voice, and the difference shows on anything a human reads end to end rather than skims for an answer.