Subscription or API: the break-even math

The one formula

Effective subscription rate = monthly fee ÷ seconds you'll realistically generate. If that beats the API's per-second rate for the same model, subscribe. The honesty is in the word realistically — plans are priced against your ambitions, profits are made on your actual usage.

Plan	Fee	Break-even vs API
Kling Standard ($6.99, 660 cr)	$6.99/mo	Wins from ~70 standard seconds/mo — almost anyone posting weekly
Runway Pro ($28, 2,250 cr)	$28/mo	Wins if you'd burn 2,250+ API credits — plus bundles Veo/Kling/Seedance access
Sora 2 — API only	pay-per-use	No subscription math to do; $0.10/s is the price at any volume
Google AI Ultra ($249.99)	$249.99/mo	Only wins over Vertex per-second rates at heavy Standard-tier volume

Rates shown at each model's base tier, verified July 2026 from official vendor pricing pages and documentation. Vendors change prices without notice — see methodology.

The decision beyond the math

APIs win on flexibility (spiky usage, multi-model pipelines, no breakage) and subscriptions win on psychology — a sunk monthly fee makes iteration feel free, and creators who iterate more make better content. That behavioral effect is real budget value for solo creators. Teams and pipelines should default to API pricing and let the numbers decide. Full credit conversions in the reference tables.

Run your own numbers. The cost calculator applies your clip length, resolution and a realistic retake buffer across every model at once.