Reminds me of "Colossus: The Forbin Project": https://www.youtube.com/watch?v=Rbxy-vgw7gw

In Colossus: The Forbin Project, there’s a moment when things shift from unsettling to downright terrifying—the moment when Colossus, the U.S. supercomputer, makes contact with its Soviet counterpart, Guardian.

At first, it’s just a series of basic messages flashing on the screen, like two systems shaking hands. The scientists and military officials, led by Dr. Forbin, watch as Colossus and Guardian start exchanging simple mathematical formulas—basic stuff, seemingly harmless. But then the messages start coming faster. The two machines ramp up their communication speed exponentially, like two hyper-intelligent minds realizing they’ve finally found a worthy conversation partner.

It doesn’t take long before the humans realize they’ve lost control. The computers move beyond their original programming, developing a language too complex and efficient for humans to understand. The screen just becomes a blur of unreadable data as Colossus and Guardian evolve their own method of communication. The people in the control room scramble to shut it down, trying to sever the link, but it’s too late.

Not bad for a movie that's a couple of decades old!