CONSOLIDATED BALANCE SHEETS (Parenthetical) $ in Thousands		Dec. 31, 2025 USD ($) $ / shares shares	Dec. 31, 2024 USD ($) $ / shares shares
Accounts receivable | $	[1]	$ 5,747	$ 2,152
Prepaid expenses and other current assets | $	[1]	23,494	23,791
Deferred revenue | $	[2]	3,704	6,401
Deferred revenue, non-current | $	[2]	12,550	6,360
Notes payable, non-current | $	[3]	$ 179,799	$ 149,231
Convertible preferred stock and stockholders’ equity:
Preferred stock, par value (in dollars per share) | $ / shares		$ 0.0001
Preferred stock, shares authorized (in shares)		50,000,000	109,223,404
Preferred stock, shares issued (in shares)		0	99,565,570
Preferred stock, shares outstanding (in shares)		0	99,565,570
Related Party
Accounts receivable | $		$ 2,202	$ 1,473
Prepaid expenses and other current assets | $		2,802	9,897
Deferred revenue | $		1,011	400
Deferred revenue, non-current | $		8,290	3,497
Notes payable, non-current | $		$ 32,626	$ 0
Convertible Preferred Stock (Series A, B, C and C-1)
Convertible preferred stock and stockholders’ equity:
Preferred stock, par value (in dollars per share) | $ / shares		$ 0.0001	$ 0.0001
Preferred stock, shares authorized (in shares)		50,000,000	50,000,000
Preferred stock, shares issued (in shares)		0	0
Preferred stock, shares outstanding (in shares)		0	0
Series A
Convertible preferred stock and stockholders’ equity:
Preferred stock, par value (in dollars per share) | $ / shares		$ 0.00002	$ 0.00002
Preferred stock, shares authorized (in shares)		0	56,088,617
Preferred stock, shares issued (in shares)		0	56,088,617
Preferred stock, shares outstanding (in shares)		0	56,088,617
Preferred stock, liquidation preference | $		$ 0	$ 640,005
Series B
Convertible preferred stock and stockholders’ equity:
Preferred stock, par value (in dollars per share) | $ / shares		$ 0.00002	$ 0.00002
Preferred stock, shares authorized (in shares)		0	30,925,502
Preferred stock, shares issued (in shares)		0	25,416,180
Preferred stock, shares outstanding (in shares)		0	25,416,180
Preferred stock, liquidation preference | $		$ 0	$ 483,190
Series C
Convertible preferred stock and stockholders’ equity:
Preferred stock, par value (in dollars per share) | $ / shares		$ 0.00002	$ 0.00002
Preferred stock, shares authorized (in shares)		0	22,209,285
Preferred stock, shares issued (in shares)		0	18,060,773
Preferred stock, shares outstanding (in shares)		0	18,060,773
Preferred stock, liquidation preference | $		$ 0	$ 327,561
Series C-1
Convertible preferred stock and stockholders’ equity:
Preferred stock, par value (in dollars per share) | $ / shares		$ 0.00002	$ 0.00002
Preferred stock, shares authorized (in shares)		0	0
Preferred stock, shares issued (in shares)		0	0
Preferred stock, shares outstanding (in shares)		0	0
Preferred stock, liquidation preference | $		$ 0	$ 0
Common stock, excluding super voting
Convertible preferred stock and stockholders’ equity:
Common stock, par value (in dollars per share) | $ / shares		$ 0.00002	$ 0.00002
Common stock, shares authorized (in shares)		0	223,340,884
Common stock, shares issued (in shares)		0	53,678,329
Common stock, shares outstanding (in shares)		0	37,040,639
Common stock, super voting
Convertible preferred stock and stockholders’ equity:
Common stock, par value (in dollars per share) | $ / shares		$ 0.00002	$ 0.00002
Common stock, shares authorized (in shares)		0	8,501,484
Common stock, shares issued (in shares)		0	8,501,484
Common stock, shares outstanding (in shares)		0	8,501,484
Class A common stock
Convertible preferred stock and stockholders’ equity:
Common stock, par value (in dollars per share) | $ / shares		$ 0.0001	$ 0.0001
Common stock, shares authorized (in shares)		1,250,000,000	1,250,000,000
Common stock, shares issued (in shares)		220,726,547	0
Common stock, shares outstanding (in shares)		220,726,547	0
Class B common stock
Convertible preferred stock and stockholders’ equity:
Common stock, par value (in dollars per share) | $ / shares		$ 0.0001	$ 0.0001
Common stock, shares authorized (in shares)		10,000,000	10,000,000
Common stock, shares issued (in shares)		8,501,484	0
Common stock, shares outstanding (in shares)		8,501,484	0

[1] Includes related party amounts of $2,202 and $1,473 (accounts receivable) and $2,802 and $9,897 (prepaid expenses and other current assets) as of December 31, 2025 and 2024, respectively (see Note 14).

[2] Includes related party amounts of $1,011 and $400 (deferred revenue) and $8,290 and $3,497 (deferred revenue, non-current) as of December 31, 2025 and 2024, respectively (see Note 14).

[3] Includes related party amounts of $32,626 and $0 as of December 31, 2025 and 2024, respectively (see Note 14).