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, 2024	Apr. 30, 2023
Numerator:
Net loss	$ (732,091)	$ (89,273)
Denominator:
Weighted-average common stock shares used in computing net loss per share, basic (in shares)	63,794	59,940
Weighted-average common stock shares used in computing net loss per share, diluted (in shares)	63,794	59,940
Net loss per common stock share, basic (in dollars per share)	$ (11.48)	$ (1.49)
Net loss per common stock share, diluted (in dollars per share)	$ (11.48)	$ (1.49)
Class A common stock
Numerator:
Net loss	$ (21,139)
Denominator:
Weighted-average common stock shares used in computing net loss per share, basic (in shares)	1,842
Weighted-average common stock shares used in computing net loss per share, diluted (in shares)	1,842
Net loss per common stock share, basic (in dollars per share)	$ (11.48)
Net loss per common stock share, diluted (in dollars per share)	$ (11.48)
Class B common stock
Numerator:
Net loss	$ (710,952)	$ (89,273)
Denominator:
Weighted-average common stock shares used in computing net loss per share, basic (in shares)	61,952	54,540
Weighted-average common stock shares used in computing net loss per share, diluted (in shares)	61,952	54,540
Net loss per common stock share, basic (in dollars per share)	$ (11.48)	$ (1.49)
Net loss per common stock share, diluted (in dollars per share)	$ (11.48)	$ (1.49)
Common Stock B, Founders Stock
Denominator:
Weighted-average common stock shares used in computing net loss per share, basic (in shares)		5,400
Weighted-average common stock shares used in computing net loss per share, diluted (in shares)		5,400
Net loss per common stock share, basic (in dollars per share)		$ (1.49)
Net loss per common stock share, diluted (in dollars per share)		$ (1.49)