Anthropic leaks Mythos 5.5 before IPO

🔥 What happened Anthropic quietly slipped a "Claude Mythos 5.5" reference into its official website's HTML — likely days before launch. Meanwhile, testers report A/B checks of sibling model Fable 5.5, with anecdotal claims it beats Google's unreleased Gemini 4 Carbon. 💡 Why it matters Mythos stays gated to vetted cyber and bio researchers, per the 5.1 playbook — the public only gets the safer Fable variant. Timing is loaded: Anthropic filed for a Nasdaq listing under "ANT" on October 26, so a model drop right before the IPO is investor bait, not a coincidence. ⚡ Our take A hidden h1 tag isn't a leak — it's a teaser. Dropping a model days before going public is valuation engineering dressed as research.