Condensed Consolidated Statements of Redeemable Convertible Preferred Stock and Stockholders' Deficit - USD ($) $ in Thousands	Total	Common stock	Additional paid-in capital	Accumulated other comprehensive income (loss)	Accumulated deficit
Temporary equity, beginning balance (in shares) at Jan. 31, 2023	74,182,559
Temporary equity, beginning balance at Jan. 31, 2023	$ 714,713
Temporary equity, ending balance (in shares) at Jul. 31, 2023	74,182,559
Temporary equity, ending balance at Jul. 31, 2023	$ 714,713
Beginning balance, shares (in shares) at Jan. 31, 2023		59,878,717
Beginning balance at Jan. 31, 2023	(1,087,329)	$ 1	$ 242,326	$ (1,301)	$ (1,328,355)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of stock option (in shares)		673,658
Issuance of common stock upon exercise of stock options	1,951		1,951
Stock-based compensation	1,632		1,632
Other comprehensive income (loss)	912			912
Net loss	(170,394)				(170,394)
Ending balance, shares (in shares) at Jul. 31, 2023		60,552,375
Ending balance at Jul. 31, 2023	$ (1,253,228)	$ 1	245,909	(389)	(1,498,749)
Temporary equity, beginning balance (in shares) at Apr. 30, 2023	74,182,559
Temporary equity, beginning balance at Apr. 30, 2023	$ 714,713
Temporary equity, ending balance (in shares) at Jul. 31, 2023	74,182,559
Temporary equity, ending balance at Jul. 31, 2023	$ 714,713
Beginning balance, shares (in shares) at Apr. 30, 2023		60,222,286
Beginning balance at Apr. 30, 2023	(1,174,581)	$ 1	243,728	(682)	(1,417,628)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of stock option (in shares)		330,089
Issuance of common stock upon exercise of stock options	977		977
Stock-based compensation	1,204		1,204
Other comprehensive income (loss)	293			293
Net loss	(81,121)				(81,121)
Ending balance, shares (in shares) at Jul. 31, 2023		60,552,375
Ending balance at Jul. 31, 2023	$ (1,253,228)	$ 1	245,909	(389)	(1,498,749)
Temporary equity, beginning balance (in shares) at Jan. 31, 2024	74,182,559
Temporary equity, beginning balance at Jan. 31, 2024	$ 714,713
Increase (Decrease) in Temporary Equity [Roll Forward]
Conversion of redeemable convertible preferred stock to common stock upon initial public offering (in shares)	(74,182,559)
Conversion of redeemable convertible preferred stock and founder stock to common stock upon initial public offering	$ (714,713)
Beginning balance, shares (in shares) at Jan. 31, 2024		61,262,729
Beginning balance at Jan. 31, 2024	(1,419,257)	$ 1	265,494	(2,239)	(1,682,513)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Conversion of redeemable convertible preferred stock and founder stock to common stock upon initial public offering (in shares)		74,182,559
Conversion of redeemable convertible preferred stock and founder stock to common stock upon initial public offering	714,713	$ 2	714,711
Issuance of common stock upon initial public offering and underwriters' exercise of over-allotment option, net of underwriting discounts and commissions, and offering costs (in shares)		26,972,252
Issuance of common stock upon initial public offering and underwriters' exercise of over-allotment option, net of underwriting discounts and commissions, and offering costs	$ 805,135	$ 1	805,134
Issuance of common stock upon exercise of stock option (in shares)	680,400	680,400
Issuance of common stock upon exercise of stock options	$ 3,718		3,718
Issuance of common stock upon settlement of restricted stock awards and restricted stock units (in shares)		18,324,878
Issuance of common stock upon settlement of restricted stock awards and restricted stock units	(432,512)		(432,512)
Stock-based compensation	737,329		737,329
Other comprehensive income (loss)	601			601
Net loss	(909,021)				(909,021)
Ending balance, shares (in shares) at Jul. 31, 2024		181,422,818
Ending balance at Jul. 31, 2024	(499,294)	$ 4	2,093,874	(1,638)	(2,591,534)
Beginning balance, shares (in shares) at Apr. 30, 2024		176,589,546
Beginning balance at Apr. 30, 2024	(514,598)	$ 4	1,902,906	(2,904)	(2,414,604)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon initial public offering and underwriters' exercise of over-allotment option, net of underwriting discounts and commissions, and offering costs (in shares)		3,472,252
Issuance of common stock upon initial public offering and underwriters' exercise of over-allotment option, net of underwriting discounts and commissions, and offering costs	105,124		105,124
Issuance of common stock upon exercise of stock option (in shares)		38,863
Issuance of common stock upon exercise of stock options	100		100
Issuance of common stock upon settlement of restricted stock awards and restricted stock units (in shares)		1,322,157
Issuance of common stock upon settlement of restricted stock awards and restricted stock units	(20,994)		(20,994)
Stock-based compensation	106,738		106,738
Other comprehensive income (loss)	1,266			1,266
Net loss	(176,930)				(176,930)
Ending balance, shares (in shares) at Jul. 31, 2024		181,422,818
Ending balance at Jul. 31, 2024	$ (499,294)	$ 4	$ 2,093,874	$ (1,638)	$ (2,591,534)