Machine Intelligence Research Institute (MIRI) — Headcount: 18

NoteThe source URL (https://intelligence.org/2024/04/02/2023-review/) returns a 404 'Page Not Found' error. The source text provided is only the error page, which contains no information about MIRI's headcount, staff size, or any other substantive data. While the URL appears to be the correct MIRI domain and the page title suggests it should be a 2023 review (matching the claim's temporal scope of 2023-12), the actual content is inaccessible. Without access to the source document's actual content, the claim cannot be verified, contradicted, or confirmed. This is unverifiable due to source unavailability.