Net Loss Per Share Attributable to Common Stockholders - Schedule of Potentially Dilutive SecuritiesExcluded From The Computation of Net Loss Per Share (Details) - shares	6 Months Ended
	Jul. 31, 2026	Jul. 31, 2025
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total	122,710,436	355,494,560
Stock options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total	46,990,777	53,487,228
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	22,536,463	21,258,674
Restricted stock units [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total	53,010,219	61,473,168
Shares subject to repurchase [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total	172,977	377,882