CREDITS & PRICING • Framework updated · Jul 2026
How Retry Rate Changes AI Video Generation Cost
The sticker price of an AI video plan tells you how many credits you get, not how many finished clips you will actually ship. Because most tools charge per second or per clip and reset unused credits every cycle, your retry rate — how many attempts it takes to approve one usable clip — quietly decides which tier you need. This guide walks through how moving from two to five attempts per clip reshapes your monthly plan math.
Why retry rate is the real cost driver
Every provider bills generation, not approval. Runway's API pricing lists per-second rates such as 12 credits per second for Gen-4.5 and 5 credits per second for Gen-4 Turbo, and its pricing page quotes 60 credits for a five-second Gen-4.5 clip. Because that charge applies to every attempt, a clip you regenerate five times costs five times as much as one you nail on the first try. The damage compounds because most monthly credits do not roll over: Runway states that Standard and Pro credits reset within 24 hours of your billing date. So a heavy-retry week early in the cycle can leave you rationing credits later, or buying more. Retry rate, not the headline price, is what separates a plan that covers your output from one that runs dry mid-month, which is why it belongs at the center of any budget.
A retry-sensitivity walkthrough: two attempts versus five
Start with one fixed unit: a five-second Gen-4.5 clip, listed on Runway's pricing page at 60 credits. For scale, Runway's API sells credits at 0.01 dollars each, which puts that clip near 0.60 dollars per attempt at API rates. Now apply a retry multiplier. At two attempts per approved clip you spend 120 credits per keeper; at five attempts you spend 300. On Standard's 625 monthly credits that is the difference between about five finished clips a month and about two. The general rule is simple: monthly credits needed = approved clips x attempts per clip x per-clip credits. If you need twenty approved clips at two attempts each, that is 2,400 credits, past Standard's 625 and even past Pro's 2,250, before a single extra retry. At five attempts those same twenty clips need 6,000 credits, which among Runway's listed tiers only Max's 9,500 covers. Model the multiplier honestly, because underestimating it is exactly what pushes teams onto emergency top-ups late in the cycle.
Rollover rules decide what a failed take really costs
The same retry can be cheap or wasteful depending on where the credits sit. On Runway's Standard and Pro plans, monthly credits reset each cycle, so credits burned on rejected takes and then left unused simply vanish; only the Max plan rolls up to one month of unused credits forward, and separately purchased credits never expire. Luma's Dream Machine documentation describes the same split: monthly credits do not roll over, while Top-Up Credits stay valid for twelve months and are consumed only after your monthly allowance. Pika lists purchasable roll-over video credits alongside its monthly allowances. For a high-retry workflow, this structure matters as much as the per-second rate. Non-rolling credits punish front-loaded experimentation, while rolling or purchased balances let a rough week carry forward instead of resetting to zero at the billing date.
Escape hatches when your retry rate stays high
If your work reliably needs many attempts per clip, choose structure over a bigger number. Runway's Max plan pairs a 9,500-credit monthly ceiling with rollover, which softens spiky cycles. Luma's credit documentation restricts its relaxed, slower-queue generation mode to upper tiers, and its Top-Up Credits, valid for twelve months, act as a buffer for retry-heavy months; check the current plan lineup on its pricing page, since tier names and boundaries change. Watermarks add another filter: Runway lists watermark-free output from Standard up, while Pika restricts watermark-free downloads to certain tiers, so a retry burned on a watermarked draft may not even be reusable. Match the escape hatch to your failure pattern, using a relaxed queue for constant iteration and rollover or top-ups for occasional bursts, rather than paying for raw credit volume you will not evenly use.
Estimate the tier you actually need before paying
Work backward from output, not from the plan grid. First, measure your real retry rate on a small batch: generate until you approve ten clips, then count the total attempts it took. Second, plug that multiplier into the formula, approved clips x attempts x per-clip credits, using the per-second or per-clip rate for the exact model and duration you ship. Third, compare the result against a plan's monthly allowance and its rollover rule, not just its price; a cheaper non-rolling tier can cost more once wasted credits are counted. Finally, treat every headline number as volatile. Model names, credit costs, and plan structures change often, so confirm the current per-second rate, monthly allowance, and rollover policy on each provider's official pricing page before you commit to a subscription.
Editorial note: This framework is general information, not a vendor endorsement. Check the current pricing, terms, and data-handling details directly with the provider before buying.