The Reds forged a comeback at the Suncorp Stadium to continue their perfect start to the Super Rugby Australia season.
After suffering back-to-back defeats, the Blues responded with a much-needed win over the Hurricanes in Auckland.
Alex Mafi crossed three times as the Reds thrashed Waratahs on Saturday, while the Chiefs edged out the Blues late on.
The Reds won in remarkable circumstances in Super Rugby AU, while the Super Rugby Aotearoa champions prevailed in much more routine fashion.
The Reds trailed for most of Friday's clash with the Rebels, but Alex Mafi's two tries helped them pinch victory at the death.
Noah Lolesio returned from two months out with a torn hamstring to inspire the Brumbies to glory over the Reds in the Super Rugby AU final.
The Brumbies will host the Reds in the Super Rugby AU final next weekend after Brad Thorn's team overcame the Rebels on Saturday.
James O'Connor scored a try and kicked 17 points as the Reds achieved a record win over Western Force on Friday.
The Reds came from behind to claim a bonus-point victory against a wasteful Rebels in Saturday's Super Rugby AU clash.
The Waratahs scored 38 points without reply in the first half as they cut loose in the rain to thrash the Reds in Sydney.