v3.26.1
Stockholders' Equity (Deficit) - Additional Information (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended
Apr. 30, 2026
Apr. 30, 2025
Jan. 31, 2026
Sep. 30, 2025
Jan. 31, 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 $ 76,494 $ 10,124      
Stock options          
Class of Stock [Line Items]          
Unrecognized stock-based compensation expense related to unvested RSUs $ 9,300        
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 $ 3,800 10,100      
Stock options outstanding 49,000,000        
Stock option weighted average exercise price $ 5.84        
Restricted Stock Units          
Class of Stock [Line Items]          
Unrecognized stock-based compensation expense related to unvested RSUs $ 481,600        
Unrecognized stock based compensation expense, recognition period 2 years        
Stock-based compensation $ 67,700 0      
Performance and Market-Based RSUs          
Class of Stock [Line Items]          
Unrecognized stock-based compensation expense related to unvested RSUs $ 65,300        
Unrecognized stock based compensation expense, recognition period 2 years        
Stock-based compensation $ 13,300 0      
ESPP          
Class of Stock [Line Items]          
Unrecognized stock-based compensation expense related to unvested RSUs $ 5,600        
Unrecognized stock based compensation expense, recognition period 4 months 24 days        
Stock-based compensation $ 4,400 $ 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        
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        
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    
Common stock, shares authorized 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 49,578,858        
Increase in number of shares available for issuance 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        
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    
Common stock, shares authorized 600,000,000   600,000,000    
Class C Common Stock          
Class of Stock [Line Items]          
Common stock, par value $ 0.0001   $ 0.0001    
Common stock, shares authorized 1,000,000,000   1,000,000,000    
Convertible Preferred Stock [Member]          
Class of Stock [Line Items]          
Preferred stock, shares outstanding 0 218,897,608 0   218,897,608
Preferred Stock [Member]          
Class of Stock [Line Items]          
Preferred stock, shares issued 0   0    
Preferred stock, shares authorized 300,000,000   300,000,000    
Preferred stock, par value $ 0.0001   $ 0.0001    
Preferred stock, shares outstanding 0   0