- Kristin Harila, Tenjen Lama Sherpa
- 92 year(s):day(s)
- United Kingdom ()
The fastest climbers to ascend all 14 mountains over 8,000 m (24,247 ft) is 92 days and was achieved by Tenjen Lama Sherpa (Nepal) and Kristin Harila (Norway), on 27 July 2023.
The climbers completed the Grand Slam in just 92 days, finishing with a climb of K2 smashing the current record held by Kristin Harila already.