Net Loss per Share - Schedule of Net Loss Per Share, Basic and Diluted (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Net loss	$ (390,696)	$ (355,847)
Less: Deemed Dividend	0	(7,576)
Net loss available to common stockholders	(390,696)	(363,423)
Net loss available to common stockholders	$ (390,696)	$ (363,423)
Class A Common Stock
Weighted average shares used in computing net loss per share of Class A and B Common Stock:
Basic (in shares)	124,299,591	18,529,525
Diluted (in shares)	124,299,591	18,529,525
Net loss per share of Class A and B Common Stock attributable to common stockholders:
Basic (in dollars per share)	$ (3.14)	$ (19.61)
Diluted (in dollars per share)	$ (3.14)	$ (19.61)
Class B Common Stock
Weighted average shares used in computing net loss per share of Class A and B Common Stock:
Basic (in shares)	124,299,591	18,529,525
Diluted (in shares)	124,299,591	18,529,525
Net loss per share of Class A and B Common Stock attributable to common stockholders:
Basic (in dollars per share)	$ (3.14)	$ (19.61)
Diluted (in dollars per share)	$ (3.14)	$ (19.61)