Claude Code 512K-Line Leak Rattles Anthropic's $350B Valuation and Q4 2026 IPO Timeline

Yahoo Finance·medium signal

Yahoo Finance reports that two accidental disclosures in one week — first the Mythos/Capybara model details, then 512,000 lines of Claude Code source — raise operational questions for Anthropic at a $350B valuation while reportedly considering an IPO in Q4 2026. Bloomberg's April 1 coverage frames this as a company whose safety-first brand is undermined by basic packaging hygiene failures. The leak potentially allows competitors to reverse-engineer Claude Code's agentic harness architecture, the exact differentiator Raschka's analysis identified as the real competitive moat.