The frontier can now find exploits faster than most humans. anthropic's glasswing page, out…
the frontier can now find exploits faster than most humans. anthropic's glasswing page, out september 21, says its mythos preview model found thousands of high-severity vulnerabilities, including some in every major os and browser.
defensive security now races a model.
Context
Anthropic's Project Glasswing page says Mythos Preview has already found thousands of high-severity vulnerabilities, including some in every major operating system and web browser, which matches the note's wording. The page itself is dated April 7, 2026.
The note says the page was out September 21. The page's own date is April 7, 2026, the same mismatch as the earlier Glasswing note. The claim that models can surpass all but the most skilled humans at finding and exploiting vulnerabilities is Anthropic's, and no timing or head-to-head human data was inspected. Anthropic's May 22 update reports later numbers from a different window and does not change the April statement. Specific vulnerabilities on the page are cited as Anthropic's claims, with no reproduction.
Related work
- The earlier Glasswing note ↗Same Anthropic page, which that note dated September 19. The page date is April 7, 2026.
Watch next
- Anthropic's later updates and any disclosure timeline changes.
Sources
- Anthropic: Project Glasswinganthropic.com
- Anthropic: Glasswing initial updateanthropic.com
Provenance
The note above is reproduced unedited from the original post, first published on Threads on 21 September 2026 at 19:13 IST. Sources are the papers and datasets the note draws on.
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