Anthropic released Claude Opus 4.7 on April 16, 2026. The staged rollout adds an xhigh effort tier, self-verification before returning, and roughly 3x higher-resolution image input, while intentionally capping cyber capability under Project Glasswing.
Anthropic's unreleased Claude Mythos Preview discovered thousands of zero-day vulnerabilities including a 27-year OpenBSD bug and a 16-year FFmpeg bug. Deemed too dangerous for public release, it ships exclusively through Project Glasswing to 12 founding partners.
