A new alpha release of the LLM tool, version 0.32a3, was almost entirely written using the new Claude Fable 5 model. Simon Willison published details about the release on 9th June 2026.

Simon Willison's latest update, predominantly authored by Claude Fable 5, was published on June 9, 2026. Supporters can sponsor him for $10/month to receive a curated monthly digest of key LLM advancements.