What happens past the single-generation ceiling

Apart from Amazon Nova Reel's two minutes in six-second beats, the longest single call any scene generator here publishes is 30 seconds, against a longest format of 60. Three entries publish far more than that (thirty minutes, ten minutes, two minutes) and two of the three drive a performance from an audio track; the third is Nova Reel. As of 2026-10-13.

Fig. 1 Filled where the page states something in that column, hollow where it does not address it.

What each tool publishes about going beyond one generation. Recorded 2026-10-13.
Item	What is published	Detail
HeyGen	30 minutes per scene	Fifty scenes per video on top of that
Hedra	10 minutes on Character-3	Length follows the audio track
Amazon Nova Reel	Two minutes, in six second beats	The model places the cuts, not an editor
Wan 3.0	2 to 30 seconds	Input plus output capped at thirty
SceneMixer	30 s on Wan 3.0 and Seedance 2.5, 15 s on Seedance 2.0 and MiniMax H3	Compositing priced at 1 credit a second
Pika	5 s and 10 s steps, 20 to 25 s on Pikaframes	No compositing step priced
Grok Imagine	15 seconds	Four calls for a minute
MiniMax	15 seconds	Four calls for a minute
PixVerse	15 seconds	Four calls for a minute
Runway	15 seconds	Four calls for a minute
Google Veo	8 seconds, and only above 720p	Eight calls for a minute
CogVideoX	6 seconds fixed	Ten calls for a minute
Kling AI, Vidu	No duration published on the priced page	Assembly not addressed

Inclusion rule. Durations and assembly pricing from the vendor's own priced page. An assembly step done in an external editor is outside this register. Order. Longest published call first; the two that publish none, last.

1Assembly is a step, a cost and a continuity risk at once

Joining pieces means somebody or something has to make two independently generated shots look like one sequence. One tool here treats it as a product step and prices it; the others leave it to an editor and a timeline, which is a different budget line rather than no cost.

The register records which tools address it because that determines whether the 60-second format is a workflow inside the product or outside it.

2The ceiling is a multiplier on the number of joins

Fifteen seconds and thirty seconds produce the same minute at the same rate and a different number of seams. Seams are where continuity breaks, breaks get regenerated, and regeneration is charged again. Across the rows here the same minute costs between one join and nine, decided entirely by this column.

So a ceiling is a cost figure even though it is not a price, and it belongs on a page about matching creative to a slot.

3Two tools publish no duration at all

Kling AI and Vidu both price resolution and say nothing about length on the page carrying the price, which leaves them unable to answer the question the 60-second format asks. LTX-Video is a separate case: it publishes a frame ceiling and a frame rate, so the seconds exist but have to be worked out rather than quoted.

Length is the field with the widest gap between what is published and what a media plan needs, and on two of these rows it would take one line on a pricing page to close.

Longest single generation
30 seconds on the Wan 3.0 and Seedance 2.5 tiers, 15 seconds on the Seedance 2.0 and MiniMax H3 tiersstated per tierSceneMixer, price list / recorded 2026-10-13
Beyond the clip limit
Episodes are composited from segments, billed at 1 credit per second of outputhow length is reachedSceneMixer, price list / recorded 2026-09-12
Durations
5 and 10 seconds for text-to-video and image-to-video, and up to 20 to 25 seconds on Pikaframespriced per stepPika, pricing / recorded 2026-09-12

4Sources

Format requirements come from Google Ads Help, read 2026-09-12, and tool limits from each vendor page listed on published limits, read 2026-09-12 and 2026-10-13. The rule against mixing the two is on method. Nearby: The hard ceiling, Emitted lengths, Spark Ads.