ARR vs ARR. Watch out for this one sly trick.

Substack · Watch/Read · (gathered 2026-08-29)

• Gary Marcus warns that the acronym “ARR” is often used ambiguously by AI companies (like Anthropic) to mislead investors, as it can mean either “Annual Recurring Revenue” or “Annualized Run Rate,” which are vastly different.
• He defines “Annual Recurring Revenue” as stable, subscription-based income, while “Annualized Run Rate” is a potentially inflated projection, often based on a single strong month multiplied by twelve, which may not be sustainable.
• Marcus claims that Anthropic’s reported “ARR” likely refers to “Annualized Run Rate,” and their revenue may not recur at the same scale next year due to the “collapse of tokenmaxxing” and a shift towards open-source models.
• He draws a parallel to Netscape’s rapid rise and fall in 1995, cautioning that meteoric growth without sustained profitability can quickly reverse, urging investors to exercise “caveat emptor” when evaluating “ARR” claims.