Viewers have warmed to the new Breakfast pairing of Rawdon Christie and Petra Bagust with the show increasing its ratings.
But TV3 rival Firstline has also grown its audience and for the first time has at times attracted more viewers by hourly slot.
Christie, a former BBC journalist, took over from Corin Dann last month when he moved to take up the reins as TVNZ's political editor.
Average ratings from Nielsen for Breakfast last week were 119,814 viewers aged 5+, which is 42.8 per cent audience share.
That compares with 103,614 viewers and 39.5 per cent audience share in the week beginning April 29 and prior to Christie's arrival.