Net Loss Per Share - Schedule of Earnings Per Share, Basic and Diluted (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Apr. 30, 2025	Apr. 30, 2024
Numerator:
Net loss	$ (102,104)	$ (732,091)
Denominator:
Weighted-average common stock shares used in computing net loss per share, basic (in shares)	191,625	63,794
Weighted-average common stock shares used in computing net loss per share, diluted (in shares)	191,625	63,794
Net loss per common stock share, basic (in dollars per share)	$ (0.53)	$ (11.48)
Net loss per common stock share, diluted (in dollars per share)	$ (0.53)	$ (11.48)
Class A common stock
Numerator:
Net loss	$ (59,676)	$ (21,139)
Denominator:
Weighted-average common stock shares used in computing net loss per share, basic (in shares)	111,998
Weighted-average common stock shares used in computing net loss per share, diluted (in shares)	111,998	1,842
Net loss per common stock share, basic (in dollars per share)	$ (0.53)	$ (11.48)
Net loss per common stock share, diluted (in dollars per share)	$ (0.53)	$ (11.48)
Class B common stock
Numerator:
Net loss	$ (42,428)	$ (710,952)
Denominator:
Weighted-average common stock shares used in computing net loss per share, basic (in shares)	79,627	61,952
Weighted-average common stock shares used in computing net loss per share, diluted (in shares)	79,627	61,952
Net loss per common stock share, basic (in dollars per share)	$ (0.53)	$ (11.48)
Net loss per common stock share, diluted (in dollars per share)	$ (0.53)	$ (11.48)