Anthropic — AI Safety Level: ASL-3 (Opus 4+), ASL-2 (Sonnet/Haiku)

NoteThe source directly confirms that (1) ASL-3 protections were activated for Claude Opus 4 on May 22, 2025, (2) this activation is explicitly described as 'precautionary and provisional', and (3) Claude Sonnet 4 does not require ASL-3 ("we have ruled out that Claude Sonnet 4 needs the ASL-3 Standard"). The claim states ASL-3 for 'Opus 4+' and ASL-2 for 'Sonnet/Haiku'. The source confirms Opus 4 at ASL-3 and Sonnet at ASL-2 (implied by not requiring ASL-3). The source does not explicitly mention Haiku's ASL level, but the claim's grouping of Sonnet/Haiku together at ASL-2 is consistent with the source's statement that only Opus 4 has crossed into ASL-3 territory. The date (2025-05) matches the source publication date (May 22, 2025).

NoteThe source directly confirms the claim's core assertions: (1) Claude Opus 4 is deployed with ASL-3 protections as of May 22, 2025, (2) this activation is explicitly described as 'precautionary and provisional', (3) Sonnet (Sonnet 4 specifically mentioned) does not require ASL-3 and remains at ASL-2 baseline, and (4) Haiku is not mentioned but the source confirms Sonnet does not meet ASL-3 threshold. The date matches the claimed 2025-05 timeframe. The only minor gap is that the source doesn't explicitly mention Haiku's ASL level, but it does confirm Sonnet's ASL-2 status and Opus 4's ASL-3 status with the precautionary/provisional qualifier as claimed.