CONSOLIDATED STATEMENTS OF REDEEMABLE CONVERTIBLE PREFERRED STOCK AND STOCKHOLDERS’ EQUITY - USD ($) $ in Thousands		Total		2023 Underwriting Agreement	2023 Subscription Agreement	2024 Underwriting Agreement	2024 Subscription Agreement	2025 Subscription Agreement	Series A Derivative Liability	Series B Derivative Liability	Common Stock		Common Stock 2023 Underwriting Agreement		Common Stock 2023 Subscription Agreement		Common Stock 2024 Underwriting Agreement		Common Stock 2024 Subscription Agreement		Common Stock 2025 Subscription Agreement		Additional Paid-In Capital	Additional Paid-In Capital 2023 Underwriting Agreement	Additional Paid-In Capital 2023 Subscription Agreement	Additional Paid-In Capital 2024 Underwriting Agreement	Additional Paid-In Capital 2024 Subscription Agreement	Additional Paid-In Capital 2025 Subscription Agreement	Treasury Stock	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit
Beginning balance (in shares) at Dec. 31, 2022		0
Beginning balance at Dec. 31, 2022		$ 0
Ending balance (in shares) at Dec. 31, 2023		0
Ending balance at Dec. 31, 2023		$ 0
Beginning balance (in shares) at Dec. 31, 2022	[1]										182,931,474
Beginning balance at Dec. 31, 2022		4,349,701									$ 18	[1]											$ 11,752,303						$ (20,716)	$ (11,572)	$ (7,370,332)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss		(2,828,420)																													(2,828,420)
Other comprehensive income (loss)		16,422																												16,422
Tax withholding payments for net settlement of employee awards		(17,615)																					(17,615)
Issuance of common stock upon vesting of employee RSUs (in shares)	[1]										1,694,776
Issuance of common stock upon vesting of employee RSUs		0																					0
Issuance of common stock under employee stock purchase plan (in shares)	[1]										474,887
Issuance of common stock under employee stock purchase plan		23,836																					23,836
Issuance of common stock upon exercise of stock options (in shares)	[1]										900,364
Issuance of common stock upon exercise of stock options		10,343																					10,343
Issuance of common stock (in shares)	[1]												17,354,495		26,569,370
Issuance of common stock				$ 1,184,224	$ 1,812,641								$ 2	[1]	$ 3	[1]								$ 1,184,222	$ 1,812,638
Accretion of redeemable convertible preferred stock (related party)		0
Stock-based compensation		300,560																					300,560
Ending balance (in shares) at Dec. 31, 2023	[1]										229,925,366
Ending balance at Dec. 31, 2023		4,851,692									$ 23	[1]											15,066,287						(20,716)	4,850	(10,198,752)
Increase (Decrease) in Temporary Equity [Roll Forward]
Issuance of Series redeemable convertible preferred stock, net of derivative liability and issuance costs (related party) (in shares)									100,000	75,000
Issuance of Series redeemable convertible preferred stock, net of derivative liability and issuance costs (related party)									$ 500,549	$ 451,683
Accretion of redeemable convertible preferred stock (related party)		$ 347,610
Ending balance (in shares) at Dec. 31, 2024		175,000							100,000	75,000
Ending balance at Dec. 31, 2024		$ 1,299,842							$ 730,025	$ 569,817
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss		(2,713,942)																													(2,713,942)
Other comprehensive income (loss)		(6,949)																												(6,949)
Tax withholding payments for net settlement of employee awards		(10,021)																					(10,021)
Issuance of common stock upon vesting of employee RSUs (in shares)	[1]										4,494,526
Issuance of common stock upon vesting of employee RSUs		0
Issuance of common stock under employee stock purchase plan (in shares)	[1]										897,646
Issuance of common stock under employee stock purchase plan		19,208																					19,208
Issuance of common stock upon exercise of stock options (in shares)	[1]										451,361
Issuance of common stock upon exercise of stock options		4,883																					4,883
Issuance of common stock (in shares)	[1]																27,748,453		39,618,838
Issuance of common stock						$ 718,357	$ 1,025,660										$ 3	[1]	$ 4	[1]						$ 718,354	$ 1,025,656
Accretion of redeemable convertible preferred stock (related party)		(347,610)			$ (347,610)																				(347,610)
Stock-based compensation		$ 331,534																					331,534
Ending balance (in shares) at Dec. 31, 2024		303,136,190	[2]								303,136,190	[1]
Ending balance at Dec. 31, 2024		$ 3,872,812									$ 30	[1]											16,808,291						(20,716)	(2,099)	(12,912,694)
Increase (Decrease) in Temporary Equity [Roll Forward]
Accretion of redeemable convertible preferred stock (related party)		$ 983,648
Ending balance (in shares) at Dec. 31, 2025		175,000							100,000	75,000
Ending balance at Dec. 31, 2025		$ 2,283,490							$ 1,339,641	$ 943,849
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss		(2,698,051)																													(2,698,051)
Other comprehensive income (loss)		13,791																												13,791
Tax withholding payments for net settlement of employee awards		(12,911)																					(12,911)
Issuance of common stock upon vesting of employee RSUs (in shares)	[1]										8,602,771
Issuance of common stock upon vesting of employee RSUs		0									$ 1												(1)
Issuance of common stock under employee stock purchase plan (in shares)	[1]										1,559,456
Issuance of common stock under employee stock purchase plan		$ 22,808									$ 1												22,807
Issuance of common stock upon exercise of stock options (in shares)		561,891									352,524	[1]
Issuance of common stock upon exercise of stock options		$ 2,342																					2,342
Issuance of common stock (in shares)	[1]																				13,715,121
Issuance of common stock								$ 299,722													$ 1	[1]						$ 299,721
Purchase of capped call options		(118,250)																					(118,250)
Accretion of redeemable convertible preferred stock (related party)		(983,648)																							$ (983,648)
Stock-based compensation		$ 318,672																					318,672
Ending balance (in shares) at Dec. 31, 2025		327,366,062	[2]								327,366,062	[1]
Ending balance at Dec. 31, 2025		$ 717,287									$ 33	[1]											$ 16,337,023						$ (20,716)	$ 11,692	$ (15,610,745)

[1] The number of shares of common stock has been adjusted for the prior periods presented to reflect the one-for-ten (1:10) reverse stock split effected on August 29, 2025. See Note 2 “Summary of Significant Accounting Policies” for more information

[2] The number of shares of common stock and treasury stock have been adjusted for the prior period presented to reflect the one-for-ten (1:10) reverse stock split effected on August 29, 2025. See Note 2 “Summary of Significant Accounting Policies” for more information.