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Anthropic Won't Let You Use Their Best Model. Prediction Markets Are Trying Anyway.

Anthropic Won't Let You Use Their Best Model. Prediction Markets Are Trying Anyway.

Been watching AI prediction markets since they got liquid earlier this year. The thing I didn't see coming is that we now have a real gap between "best model that exists" and "best model anyone can actually use" — and Mythos is the cleanest example. Two bits stood out: The Mythos June-30 release market spiked from 25% → 42% the day GPT-5.5 shipped, then drifted right back. Traders briefly priced in a competitive response from Anthropic. They didn't get one. Same traders give Mythos 27% to