No they were not.
Especially if you were an end user, you wouldn't have been able to tell it wasn't their own model. That exactly isn't being clear nor public.
> This incident affected: Automations, Review Agents, Cloud Agents, and Origin.
Cursor has built a code review bot (https://cursor.com/bugbot) which integrates with Github similar to Greptile/Coderabbit. Origin has a feature which imports existing github repos to onboard new users. Automation and cloud agents is self explanatory.