Polymarket traders have pushed the probability of Anthropic releasing its next Mythos-class AI model by September 9, 2026, to 74 percent, with over $233,000 wagered on this specific contract and more than $6 million across broader AI model race markets. Related contracts reflect even stronger confidence, with 87 percent odds for an end-of-month release and 96 percent odds for a new Opus model by year-end. This optimism is anchored by Anthropic launching Claude Fable 5 and Claude Mythos 5 on June 9, 2026, which gave traders a timestamp to project future release schedules.
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