A model finds 500 zero-days, some decades old

Claim

Opus 4.6 discovered 500 zero-day vulnerabilities in open source codebases, including some that had gone undetected for decades, while Anthropic launched Agent Teams for multi-agent coordination and added server-side compaction.

Reported metric: 500 zero-days

Reporting date: 2026-02-06 (not necessarily the event date)

Sources

Attribution and reporting linked by this record; links do not imply independent verification.

• Welcome to February 6, 2026 (theinnermostloop.substack.com)