Are credits or minutes better value in AI video?

Credits are usually better value and always harder to compare, because the rate changes with the model and resolution you choose. Minutes are easier to compare and typically cost more per minute. The only way to know is to convert both to cost per finished minute for the output you actually produce.

Why do AI video platforms charge different rates for different models?

Because the models cost different amounts to run. A higher-quality avatar model generates more frames or runs a heavier pipeline, so it consumes more compute per minute of output. Credit systems pass that through directly, which is honest but makes headline comparisons misleading.

Do unused AI video credits roll over?

It varies, and it matters more than most buyers expect. Here credits roll over for 30 days. Some platforms reset monthly, which effectively penalises any production schedule that is not perfectly even.

Buying guide

Credits, minutes and seats

5 September 2026 · 3 min read

Comparing AI video platforms on headline price tells you almost nothing, because the plans are not measuring the same thing. One sells minutes, one sells credits whose value changes depending on which model you pick, and one sells seats. Converting all three to a cost per finished minute takes about five minutes and usually reorders the shortlist.

The three models

MinutesYou buy a monthly allowance of finished video minutes. Easiest to compare, and typically the most expensive per minute. Synthesia publishes 12 minutes a month on its $29 Starter plan and 30 on its $89 Creator plan.
CreditsYou buy credits and spend them at a rate that depends on what you generate. Flexible, and much harder to compare — the same 600 credits can be 85 minutes of video or 19, depending on which model you select.
SeatsYou pay per user, often on top of one of the above. Fine for a large team, and a significant hidden cost for a small one. HeyGen's Business plan is $149 a month plus $20 per seat.

The trap in credit pricing

Credits are not a unit of output, they are a unit of billing, and the exchange rate between them moves. HeyGen publishes 7 credits per minute for an Avatar III photo look, 16 for Avatar IV photo, and 31 for an Avatar IV video look. Those are the same credits and the same plan.

So the 600 credits on a $29 Creator plan are worth about 85 minutes of video if you use the older model and about 19 if you use the newest one at its highest quality. Both figures are true. Only one of them appears in a comparison someone else wrote for you.

Working out true cost per minute

Start from the plan you would really buyNot the free tier and not the enterprise tier. The one that matches your volume.
Find the consumption rate for your actual outputCredits per minute for the specific model, or minutes included, or characters per month for text-to-speech.
Divide the monthly price by the monthly outputThis gives cost per minute. Do it for every platform on the shortlist using the same output type.
Add the seat costMultiply by the number of people who need access, and add it before comparing.
Check what expiresAn allowance that resets monthly is worth less than one that rolls over, and the difference is large if your production is lumpy.

Worked at the same $29 a month: Synthesia's 12 included minutes is about $2.42 a minute. HeyGen's 600 credits is about $0.34 a minute on Avatar III or $0.77 on Avatar IV photo. The Creator plan here is 3,200 credits at 18 per minute, which is about $0.163 a minute — and the same credits also cover voice, dubbing, images and shorts.

Four things that make a cheap plan expensive

Model tier multipliers. The plan is priced on the base model; the output you want uses the premium one at three or four times the rate.
Resolution multipliers. 4K commonly costs 35–50% more than 720p for the same duration, applied across the whole render.
Seat fees. A $149 plan for a team of five is a $249 plan.
Expiry. Credits that vanish monthly punish exactly the production pattern most teams have — quiet weeks followed by a deadline.

For reference on the last point, credits here roll over for 30 days, and the cost of any job is shown before it runs rather than discovered afterwards.

When a more expensive platform is the right answer

Cost per minute is the right lens for volume production. It is the wrong lens for a few other cases, and pretending otherwise wastes your time.

If you need a specific stock presenter and do not have a photograph to work from, a large avatar library is worth paying for.
If procurement requires certifications, workflow approvals and a vendor relationship, buy the platform that is set up to pass that review.
If the deliverable is one national ad where voice quality is the entire product, buy the best voice regardless of per-minute cost.
If you need real-time or conversational output rather than rendered files, per-minute pricing does not apply to your problem at all.

Common questions

Are credits or minutes better value in AI video?: Credits are usually better value and always harder to compare, because the rate changes with the model and resolution you choose. Minutes are easier to compare and typically cost more per minute. The only way to know is to convert both to cost per finished minute for the output you actually produce.
Why do AI video platforms charge different rates for different models?: Because the models cost different amounts to run. A higher-quality avatar model generates more frames or runs a heavier pipeline, so it consumes more compute per minute of output. Credit systems pass that through directly, which is honest but makes headline comparisons misleading.
Do unused AI video credits roll over?: It varies, and it matters more than most buyers expect. Here credits roll over for 30 days. Some platforms reset monthly, which effectively penalises any production schedule that is not perfectly even.

Pricing ReVidGen vs HeyGen ReVidGen vs Synthesia

Test it against your own footage.

The free plan needs no card, and every job shows its cost before it runs.