How many generations may run together
Concurrency is how many generations a channel will run at once for one account. It has no effect on what a second costs and decides how many seconds arrive in an afternoon, which is what a delivery date is made of. As of 2026-10-13.
| Channel | What is published | Read from |
|---|---|---|
| HeyGen | One tier described as twice the concurrency of the tier below, neither quantified | The pricing page |
| Kling AI | Twenty concurrency per developer package; unlimited tasks on the membership | The developer prices and the membership page |
| SceneMixer | Three at once on a free account; five, eight, ten, fifteen and twenty by paid tier | The paid plan guide |
| Vidu | Five concurrent sessions free, each further one at about $2,080 a month | The API price page |
Inclusion rule. Channels whose public pages address how many generations may run at the same time. Silence is the norm across this register and is not listed channel by channel. Order. Alphabetical by channel name.
1It is a schedule constraint wearing a pricing page
A rate reachable one job at a time and the same rate reachable twenty at a time are not the same offer. Batch work is where that binds: reference images, then every segment of an episode, then a burst of regenerations after review.
None of it changes the invoice. All of it changes the calendar, which is why a price comparison cannot express the difference in its own units.
2Figures, a price and one ratio
Of the four answers published here, one is a number per package, one is a number plus a monthly price for raising it, one is a number for every membership tier, and one is a ratio with no base. A ratio works on a tier grid and fails as soon as somebody has to decide whether a tier is enough; a number per tier lets the decision be made before buying.
3Why sellers keep it vague
A published concurrency limit converts spare capacity into something buyers will hold a company to. Capacity is exactly what an operator wants to keep discretionary, so the usual answer is silence and the next most usual is an adjective.
4Measuring it takes ten minutes
Submit a batch the size a real episode needs and time the whole batch, not one job. The useful number is finished segments per hour, and it is the figure a schedule should be built on whether or not a page states it.
5It interacts with the ceiling and the retake rate
A production needing sixty generations an episode at a fifteen-second ceiling, with one attempt in three discarded, is ninety calls per episode. At five in flight that is a long afternoon; at one in flight it is a week, and neither number appears on a rate card.
So the three figures to collect together are the ceiling, the rejection rate and the parallel limit. Any one of them alone underestimates how long an episode takes to produce.
6Pages these figures were read from
A definition entry: what the term means, and the figures vendors put in public about it, each figure read on 2026-10-13. Related: Credit allowance, Credit validity.