v3.26.1
Stockholders' Equity - Additional Information (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 6 Months Ended
Jul. 31, 2026
Jul. 31, 2025
Jul. 31, 2026
Jul. 31, 2025
Jan. 31, 2026
Sep. 30, 2025
Class of Stock [Line Items]            
Common stock, voting rights     Each share of Class A common stock is entitled to one vote per share. Each share of Class B common stock is entitled to 20 votes per share and is convertible at any time into one share of Class A common stock. Shares of Class C common stock have no voting rights, except as otherwise required by law.      
Stock-based compensation $ 63,026 $ 7,557 $ 139,520 $ 17,681    
Stock options            
Class of Stock [Line Items]            
Unrecognized stock-based compensation expense related to unvested RSUs 6,500   $ 6,500      
Unrecognized stock based compensation expense, recognition period     8 months 12 days      
Term of termination of option grant     Options granted generally have a maximum term of 10 years from grant date or 90 days from the termination of the optionee, are exercisable upon vesting unless otherwise designated for early exercise by the board of directors at the time of grant, and generally vest over a period of four years.      
Stock-based compensation $ 2,400 7,600 $ 6,200 17,600    
Stock options outstanding 47,000,000   47,000,000      
Stock option weighted average exercise price $ 5.85   $ 5.85      
Restricted Stock Units            
Class of Stock [Line Items]            
Unrecognized stock-based compensation expense related to unvested RSUs $ 410,200   $ 410,200      
Unrecognized stock based compensation expense, recognition period     1 year 10 months 24 days      
Stock-based compensation 56,600 0 $ 124,400 0    
Performance and Market-Based RSUs            
Class of Stock [Line Items]            
Unrecognized stock-based compensation expense related to unvested RSUs 53,400   $ 53,400      
Unrecognized stock based compensation expense, recognition period     1 year 10 months 24 days      
Stock-based compensation 11,900 0 $ 25,100 0    
ESPP            
Class of Stock [Line Items]            
Unrecognized stock-based compensation expense related to unvested RSUs 1,600   $ 1,600      
Unrecognized stock based compensation expense, recognition period     2 months 12 days      
Stock-based compensation $ 3,500 $ 0 $ 7,800 $ 0    
2012 Stock Incentive Plan            
Class of Stock [Line Items]            
Share-based compensation vesting description     The options generally vest over four years with 25% of the option shares vesting one year from the service commencement date and then monthly over the following 36 months and expire no more than ten years after the date of grant.      
Share-based compensation, vesting period     4 years      
Vesting rights, percentage     25.00%      
Share of common stock 127,243,597   127,243,597      
Expiration period     10 years      
2012 Stock Incentive Plan | Stock options            
Class of Stock [Line Items]            
Share-based compensation, vesting period     1 year      
2022 Stock Incentive Plan            
Class of Stock [Line Items]            
Share-based compensation vesting description     The options generally vest over four years with 25% of the option shares vesting one year from the service begin date and then monthly over the following 36 months and expire no more than 10 years after the date of grant.      
Share-based compensation, vesting period     4 years      
Vesting rights, percentage     25.00%      
Expiration period     10 years      
2022 Stock Incentive Plan | Stock options            
Class of Stock [Line Items]            
Share-based compensation, vesting period     1 year      
2022 Stock Incentive Plan | Restricted Stock Units | Maximum [Member]            
Class of Stock [Line Items]            
Share-based compensation, vesting period     4 years      
2022 Stock Incentive Plan | Restricted Stock Units | Minimum [Member]            
Class of Stock [Line Items]            
Share-based compensation, vesting period     3 years      
2025 Employee Stock Purchase Plan | ESPP            
Class of Stock [Line Items]            
Initial public offering price $ 19   $ 19      
Purchase price of common stock, percent     85.00%      
Class A Common Stock            
Class of Stock [Line Items]            
Common stock, par value $ 0.0001   $ 0.0001   $ 0.0001  
Common stock, shares authorized 3,000,000,000   3,000,000,000   3,000,000,000  
Class A Common Stock | 2025 Plan            
Class of Stock [Line Items]            
Common stock, shares reserved for issuance 51,433,295   51,433,295      
Increase in number of shares available for issuance 38,210,000   38,210,000      
Percentage of outstanding shares of capital stock     5.00%      
Class A Common Stock | 2022 Plan            
Class of Stock [Line Items]            
Common stock, shares reserved for issuance 38,210,000   38,210,000      
Class A Common Stock | 2025 Employee Stock Purchase Plan            
Class of Stock [Line Items]            
ESPP shares reserved for issuance           7,650,000
Class A Common Stock | 2025 Employee Stock Purchase Plan | ESPP            
Class of Stock [Line Items]            
Purchase price of common stock, percent     85.00%      
Class B Common Stock            
Class of Stock [Line Items]            
Common stock, par value $ 0.0001   $ 0.0001   $ 0.0001  
Common stock, shares authorized 600,000,000   600,000,000   600,000,000  
Class C Common Stock            
Class of Stock [Line Items]            
Common stock, par value $ 0.0001   $ 0.0001   $ 0.0001  
Common stock, shares authorized 1,000,000,000   1,000,000,000   1,000,000,000  
Preferred Stock [Member]            
Class of Stock [Line Items]            
Preferred stock, shares issued 0   0   0  
Preferred stock, shares authorized 300,000,000   300,000,000   300,000,000  
Preferred stock, par value $ 0.0001   $ 0.0001   $ 0.0001  
Preferred stock, shares outstanding 0   0   0