Anthropic’s irregular Fable release cadence after Claude Fable 5.1 in early September drives the fragmented near-term probabilities, with traders assigning roughly 30% combined odds to a November 9–10 drop amid reports of internal model routing tests and pretraining runs. The closely matched November 18 and 10–11 contracts reflect uncertainty over whether the next 5.2+ iteration will ship as a modest update or require additional safety classifier tuning and partner integrations before general API availability. Competitive pressure from OpenAI and Google model cycles, combined with Fable’s focus on long-context agentic coding and 1M-token windows, incentivizes earlier timing, yet the absence of official announcements or benchmark leaks keeps the distribution wide rather than concentrated on any single date.