**Trader sentiment for the next Anthropic Claude Fable model (5.2 or higher) centers on unconfirmed leaks pointing to a late-September or early-October 2026 release window.** X accounts reported a new pretraining run in early September, with expectations of a “significant leap” and possible stealth routing tests of an updated model behind Fable 5.1 (released September 1). Anthropic has remained silent on any Fable 5.2+ update, even after its September 22 announcement of Sonnet 5.5 and Haiku 5.5, leaving the exact timing dependent on internal validation, safety reviews, and competitive positioning against other frontier labs. The broad distribution of probabilities across early-to-mid October dates captures this uncertainty, while the low odds of no release by month-end reflect trader confidence that the rumored pretraining cycle will conclude soon.