NET LOSS PER SHARE ATTRIBUTABLE TO COMMON STOCKHOLDERS - Schedule of Earnings Per Share, Basic and Diluted (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2026	Jul. 31, 2025	Jul. 31, 2026	Jul. 31, 2025
Numerator:
Net loss attributable to Class A and Class B common stockholders	$ (93,400)	$ (72,019)	$ (169,564)	$ (280,212)
Denominator:
Weighted-average shares used in computing net loss per share attributable to Class A and Class B common stockholders, diluted (in shares)	341,527,623	330,938,421	339,301,479	329,481,933
Net loss per share attributable to Class A and Class B common stockholders, diluted (in USD per share)	$ (0.27)	$ (0.22)	$ (0.50)	$ (0.85)