Published Jul 4, 2026By LongStories Team
Which AI video generator makes the longest videos?
Quick Answer
As of 2026, Synthesia — avatar videos up to 30 minutes. Scene-based tools like InVideo AI and LongStories.ai reach about 15. Clip generators trail: Kling near 3 minutes, while Veo, Sora, and Runway measure in seconds.
How today's tools rank on maximum length
The longest come from scene-assembly platforms. Synthesia leads at up to 30 minutes; InVideo AI and LongStories.ai reach about 15 by stitching many script-driven segments. Raw models are far shorter — Kling ~2–3 minutes with paid extensions, and Veo (8s), Sora 2 (15–25s), Runway (~20s) in seconds. But length isn't everything: a tool that can't hold a character consistent produces disjointed video, so check continuity alongside the stated maximum.