CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Income Statement [Abstract]
Revenue (including $5,096 and $51,366 from a related party for the three months ended March 31, 2025 and 2024, respectively)	$ 235,048	$ 172,740
Costs and expenses
Cost of revenue	463,560	404,796
Research and development	251,246	284,627
Selling, general and administrative	212,175	213,232
Total cost and expenses	926,981	902,655
Loss from operations	(691,933)	(729,915)
Other income (expense), net
Change in fair value of common stock warrant liability	12,861	27,054
Change in fair value of equity securities of a related party	(13,453)	(19,933)
Change in fair value of derivative liabilities associated with redeemable convertible preferred stock (related party)	281,700	0
Interest income	52,209	50,631
Interest expense (including $3,700 and $1,381 to a related party for the three months ended March 31, 2025 and 2024, respectively)	(11,883)	(7,501)
Other income (expense), net	2,965	(1,007)
Total other income, net	324,399	49,244
Loss before provision for (benefit from) income taxes	(367,534)	(680,671)
Provision for (benefit from) income taxes	(1,363)	188
Net loss	(366,171)	(680,859)
Accretion of redeemable convertible preferred stock (related party)	(364,925)	(3,901)
Net loss attributable to common stockholders, basic	(731,096)	(684,760)
Net loss attributable to common stockholders, diluted	$ (731,096)	$ (684,760)
Weighted-average shares outstanding attributable to common stockholders
Basic (in shares)	3,036,317,307	2,301,870,644
Diluted (in shares)	3,036,317,307	2,301,870,644
Net loss per share attributable to common stockholders
Basic (in dollars per share)	$ (0.24)	$ (0.30)
Diluted (in dollars per share)	$ (0.24)	$ (0.30)
Other comprehensive income (loss)
Net unrealized gains (losses) on investments, net of tax	$ 3,552	$ (3,262)
Foreign currency translation adjustments	3,897	(3,988)
Total other comprehensive income (loss)	7,449	(7,250)
Comprehensive loss	(358,722)	(688,109)
Accretion of redeemable convertible preferred stock (related party)	(364,925)	(3,901)
Comprehensive loss attributable to common stockholders	$ (723,647)	$ (692,010)