Help with Mortgage Rate Climb

Our lender told us rates are going up at historic/volatile rates. We were presented 6.375% 10 days ago. Now he’s telling us to lock in at 7.125 (no points) because the rates are going to continue quickly climbing. NJ - 850k purchase price 20% down. 800+ credit

I feel like we can do better than 7.125% as a friend of ours with worse credit got 5.75% about three weeks ago.

Any advice is appreciated!