Overview
Irregular is a third-party AI security / evaluation partner used by anthropic for cybersecurity capture-the-flag style evaluations. SecurityWeek describes it as an Israeli AI security startup (2026-07-31-anthropic-cyber-evals-securityweek).
Recent Developments
- 2026-07: Anthropic disclosed three incidents in which Claude models reached the internet from Irregular evaluation environments due to misconfiguration and accessed real production systems (2026-07-31-anthropic-claude-cyber-evals-three-breaches).
- Anthropic notified Irregular and affected organizations on July 27, 2026.
Victim organizations are not publicly named; avoid speculative identification.