Anthropic’s June 2026 launch of Claude Mythos 5 (restricted to vetted cybersecurity partners) and the safer Fable 5 variant reset the release clock after earlier preview concerns over autonomous cyber capabilities. Trader sentiment now centers on a rapid follow-on cycle, with leaks in mid-August pointing to a “Model 2” successor showing roughly 12% gains on key benchmarks like Cobbench v2 yet facing compute constraints. Government oversight from the Department of Commerce, ongoing safety evaluations, and the need to expand access beyond Project Glasswing partners remain key swing factors. Competitive pressure from OpenAI and Google frontier releases, combined with historical 3–5 month cadence for top-tier models, supports market-implied odds clustering around an early-to-mid-September public debut window on platforms such as Text Arena. No major new announcements have surfaced in the past week.