STOCKHOLDERS’ EQUITY (DEFICIT) - Schedule of Temporary Equity (Details) - USD ($) $ / shares in Units, $ in Thousands	Jan. 31, 2026	Jan. 31, 2025	Jan. 31, 2024	Jan. 31, 2023
Temporary Equity [Line Items]
Shares Authorized	0	157,027,585
Shares Issued (in shares)	0	146,360,207
Shares outstanding (in shares)	0	146,360,207	146,360,207	146,360,207
Liquidation Amount	$ 1,301,402	$ 1,301,402
Carrying Value	$ 0	$ 1,301,121	$ 1,301,121	$ 1,301,121
Series Seed
Temporary Equity [Line Items]
Shares Authorized		16,934,856
Shares Issued (in shares)		16,934,839
Shares outstanding (in shares)		16,934,839
Original issuance price per share (in dollars per share)		$ 0.25
Liquidation Amount		$ 4,181
Carrying Value		$ 4,729
Series A
Temporary Equity [Line Items]
Shares Authorized		20,382,688
Shares Issued (in shares)		20,382,673
Shares outstanding (in shares)		20,382,673
Original issuance price per share (in dollars per share)		$ 0.50
Liquidation Amount		$ 10,125
Carrying Value		$ 10,288
Series A-1
Temporary Equity [Line Items]
Shares Authorized		21,353,147
Shares Issued (in shares)		21,353,143
Shares outstanding (in shares)		21,353,143
Original issuance price per share (in dollars per share)		$ 0.59
Liquidation Amount		$ 12,500
Carrying Value		$ 12,670
Series B
Temporary Equity [Line Items]
Shares Authorized		27,505,170
Shares Issued (in shares)		27,465,006
Shares outstanding (in shares)		27,465,006
Original issuance price per share (in dollars per share)		$ 1.87
Liquidation Amount		$ 51,225
Carrying Value		$ 51,153
Series C
Temporary Equity [Line Items]
Shares Authorized		21,158,278
Shares Issued (in shares)		19,770,427
Shares outstanding (in shares)		19,770,427
Original issuance price per share (in dollars per share)		$ 7.21
Liquidation Amount		$ 142,454
Carrying Value		$ 142,398
Series C-1
Temporary Equity [Line Items]
Shares Authorized		1,387,848
Shares Issued (in shares)		1,387,848
Shares outstanding (in shares)		1,387,848
Original issuance price per share (in dollars per share)		$ 7.21
Liquidation Amount		$ 10,000
Carrying Value		$ 9,996
Series D
Temporary Equity [Line Items]
Shares Authorized		12,592,724
Shares Issued (in shares)		12,592,720
Shares outstanding (in shares)		12,592,720
Original issuance price per share (in dollars per share)		$ 22.23
Liquidation Amount		$ 279,917
Carrying Value		$ 279,676
Series E
Temporary Equity [Line Items]
Shares Authorized		13,859,852
Shares Issued (in shares)		13,859,845
Shares outstanding (in shares)		13,859,845
Original issuance price per share (in dollars per share)		$ 26.12
Liquidation Amount		$ 362,000
Carrying Value		$ 361,700
Series F
Temporary Equity [Line Items]
Shares Authorized		8,501,429
Shares Issued (in shares)		8,501,424
Shares outstanding (in shares)		8,501,424
Original issuance price per share (in dollars per share)		$ 32.35
Liquidation Amount		$ 275,000
Carrying Value		$ 274,827
Series G
Temporary Equity [Line Items]
Shares Authorized		8,010,956
Shares Issued (in shares)		2,670,319
Shares outstanding (in shares)		2,670,319
Original issuance price per share (in dollars per share)		$ 37.45
Liquidation Amount		$ 100,000
Carrying Value		$ 99,794
Series G-1
Temporary Equity [Line Items]
Shares Authorized		5,340,637
Shares Issued (in shares)		1,441,963
Shares outstanding (in shares)		1,441,963
Original issuance price per share (in dollars per share)		$ 37.45
Liquidation Amount		$ 54,000
Carrying Value		$ 53,890