Some weeks in AI feel like incremental patch releases. This one felt like a major version bump for the entire industry. Four events ' a frontier model launch, a consumer assistant reboot, the largest IPO in history, and a $12 billion bet on physical engineering ' and if you squint, they're all chapters of the same story: AI escaping the chat window. Start with Anthropic. On Tuesday the company released Claude Fable 5 and Claude Mythos 5, and the architecture of the launch is as interesting as the model itself. Both share the same base model; the difference is policy, not weights. Fable 5 ships with conservative safety classifiers that intercept queries in high-risk domains ' cybersecurity, biology, chemistry ' and fall back to Opus 4.8, while Mythos 5 runs unrestricted for a vetted group of cyber defenders under Project Glasswing. Think of it as the same kernel with different syscall permissions. The benchmarks justify the caution: 80.3% on SWE-Bench Pro, more than ten points clear...
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