The short answer: a video has more than one cost
The cost of an AI-generated video depends on the model, length, number of attempts and subscription. Two clips that look equally long can consume very different amounts of credits. More importantly, a credit is not a dollar, and a Runway credit is not interchangeable with a Google Flow credit.
We recommend calculating a generation budget first, then a separate cash budget for the subscription, voice-over, editing and other tools. This keeps the math honest when you compare providers.
Quick formula: Finished clips × (1 + extra attempts per finished clip) × credits per generation = expected production credits. Round attempted generations up to whole outputs before booking a budget.
2026 credit examples from official providers
The following examples are based on provider documentation checked on October 30, 2026. They show credits used, not the price in USD of each output. Subscription costs and additional credit purchases are separate decisions.
| Platform / model | Example output | Credits per output | Important limitation |
|---|---|---|---|
| Runway Gen-4 Turbo | 10 seconds | 50 Runway credits | 5 credits/second; requires image input |
| Runway Gen-4.5 | 10 seconds | 120 Runway credits | 12 credits/second |
| Google Flow Veo 3.1 Lite | 8 seconds | 10 Flow credits | Non-Ultra rate; tier eligibility varies |
| Google Flow Veo 3.1 Fast | 8 seconds | 20 Flow credits | Non-Ultra rate |
| Google Flow Veo 3.1 Quality | 8 seconds | 100 Flow credits | 8-second output in published table |
Sources: Runway Gen-4, Runway Gen-4.5, and Google Flow credits. Rates may change.
Worked example: 100 ten-second Runway clips
Suppose a production team needs 100 usable 10-second clips in Runway Gen-4 Turbo. The documented rate is 5 credits/second, or 50 credits per attempt. If the team expects another 25 attempts for prompts that need refining, it will generate 125 clips in total.
This is not an invoice for 6,250 dollars. Runway Standard includes 625 monthly credits and its plan pricing is separate. Use the subscription plan finder to evaluate allowances and top-ups; confirm terms directly with Runway before paying.
Four hidden costs creators tend to miss
- Rejected outputs: generate-to-keep ratios matter more than a headline cost per clip. Estimate extra attempts explicitly, using the failed generation calculator.
- Multiple outputs per request: Google notes that one request can return more than one chargeable generation. Always check output count.
- Audio and revisions: narration, dubbing, music and sound effects may use separate tools and allowances.
- Subscription and editing time: unused credits, top-up minimums, human editing and exports can change the actual project economics.
How to make a realistic project budget
Start with the number of finished clips, the required duration and the provider/model. Add your best estimate of retakes based on prior experience—if you have no history, run a small trial batch and measure the actual number of attempts. Then calculate credits and compare the result with your own plan allowance. Finally, add non-video spending and evaluate the cash result with the production ROI calculator.
Frequently asked questions
Is one AI video credit equal to one US cent?
No. Each provider defines its own credit unit and purchase rules. Avoid converting credits across platforms or treating each credit as a universal cash amount.
Can I calculate exact costs before generating?
You can calculate documented credit consumption for a specific model, but the number of retakes, subscription eligibility, special offers and editing time remain variable.
What should I measure on my first project?
Track attempted outputs, accepted clips, final seconds delivered, credits spent, editing time and the monthly subscription bill. Those numbers will produce a much better second-project forecast.
Official sources and methodology
We rely on published provider documentation for product rates, and mark our own assumptions (such as retries and editing costs) separately. Provider prices and eligibility can change. Checked October 30, 2026. For calculation rules, see FrameSpend's methodology.