US companies have developed 40 advanced AI systems.

Omissions

• The claim omits the time period: the figure 40 refers specifically to 2024 only, not a cumulative or current total.
• The claim attributes the 40 models exclusively to 'US companies,' while the Stanford report counts all U.S.-based institutions, including universities and non-profit research organizations. Approximately 90% (≈36 of 40) came from industry.
• The claim uses the term 'advanced AI systems,' whereas the Stanford report categorizes them as 'notable AI models,' a term defined by specific criteria including training compute and parameter count.
• A 2026 AI Index Report may have been published with updated figures for 2025, but it could not be accessed within search limits to confirm whether the 40 figure remains current as of the session date (2026-05-19).

Sources

• PrimaryStanford HAI — 2025 AI Index ReportIn 2024, U.S.-based institutions produced 40 notable AI models, significantly outpacing China's 15 and Europe's three.
• PrimaryarXiv — Artificial Intelligence Index Report 2025 (preprint)In 2024, U.S.-based institutions produced 40 notable AI models, significantly surpassing China's 15 and Europe's combined total of three.