Sparks

Sparks pay for Arcwright's built-in AI (Claude Opus 5.5). You only need them if you use the built-in AI; your own AI app or key is free.

• 1 Spark ≈ 1 cent of AI.
• A typical building step (the AI looks at your scene, plans, makes the change and checks it) costs about 8 Sparks, so 1,100 Sparks is roughly 130 steps.
• Every reply shows what it cost. Bought Sparks never expire. Unused Sparks can be refunded within 14 days of buying.
• Click Sparks in the top bar to see your balance, buy a pack (checkout opens in your browser) or see your history.