From day one. We would have had LLMs years before if Google wasn't holding back. They knew the risk - google search would be dead as soon as the internet were flooded with AI content that google could not distinguish from real content.

Then you could look at how the first "public preview" models they released were so neutered by their own inhibitions they were useless (to me). Things like over-active refusals in response to "killing child processes".