Net Loss Per Share Attributable to Common Stockholders - Schedule of Potentially Dilutive SecuritiesExcluded From The Computation of Net Loss Per Share (Details) - shares	3 Months Ended
	Apr. 30, 2026	Apr. 30, 2025
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total	128,756,432	347,729,054
Stock options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total	48,989,052	56,819,822
Convertible Preferred Stock [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total	0	218,897,608
Convertible notes [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total	22,333,083	21,066,111
Restricted stock units [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total	57,210,093	50,464,374
Shares subject to repurchase [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total	224,204	481,139