It would require government permission. The top labs would be agreeing not to compete on model advancements for a period of time, which seems like a pretty clear violation of antitrust law.

That isn’t any kind of antitrust violation. Agreeing not to undercut each other’s prices would be, however.

How is this a clear violation of antitrust law? And have any of the leaders of these companies said that they are asking for government permission for this reason?