All right, guys, thanks so much.

Welcome to closing bell.

I'm Scott Wapner, live from Post 9 here at the New York Stock Exchange.

This maker break hour begins with the battle for AI domination.

And new developments placing Elon Musk and Sam Altman at odds once again.

We'll have those details straight ahead.

As several stocks in that space are moving today, here is the scorecard with 60 to go in regulation.

Not exactly the highest conviction one way or the other today,

but the S&P is making another run at a new closing high.

We will track it about four or five points below it right now.

Sectors, they're pretty much split today.

Energy is leading the way,

and most of the banks are higher today too.

Bank of America shares, however, there they are.

They are lower by about 1%. A new filing from Berkshire Hathaway reveals that firm selling even more

shares lately. Interesting news. Constellation Brands shares are sharply higher. Berkshire initiating

a new position, so those stocks going in opposite directions. It does take us to our talk of the tape.

Several AI stocks surging today from Oracle to Dell to Vistra and Vertev, perhaps because of

Elon Musk's new AI model. We have three reporters on the beat today. Steve Kovac, who covers

Tech, Kate Rooney on all things AI and Christina Parts and Evolos on Nvidia's March higher.

Steve Kovac, you first.

What's this all about with this new version of this model today?

...