Anthropic’s new frontier model, Mythos, signals a dangerous shift toward "AI enclosure"—gating the most powerful cognitive tools behind seven-figure enterprise and government contracts rather than technical merit. Because its "safety" and performance claims are backed by PR rather than reproducible public benchmarks, it amplifies inequality and forces developer dependency on opaque, closed ecosystems. The solution isn't more regulation, but rather actively building and adopting powerful, open-source alternatives (like DeepSeek-V3 or the Flower framework) to democratize AI and level the playing field.