US AI Safety Institute (now CAISI) — Headcount: 20–30

NoteThe claim states CAISI has 20–30 employees as of April 2026, with the additional context noting this is a rough estimate and that CAISI does not publish headcount. The source (dated February 3–4, 2026, updated before the April 2026 claim date) confirms that CAISI does not publish headcount and lists the six teams and open positions mentioned in the context. However, the source provides no explicit headcount figure—neither current employees nor total headcount. The claim's estimate of 20–30 employees cannot be verified or contradicted by the source, as the source intentionally does not disclose this information. The context's observation about 'roughly a dozen open positions' is consistent with the source showing multiple hiring across six teams, but this does not confirm the total headcount estimate.