Comparison
Veo 3.1 Fast vs Kling 3.0
Both open on the Hobby plan, both render sound with the picture, and both take first and last frames, reference pictures and a negative prompt — and both charge more per second with the soundtrack on. The difference is shape. Veo 3.1 Fast renders 4, 6 or 8 seconds at 720p or 1080p and honours a seed; Kling 3.0 renders any length from 3 to 15 seconds at 720p, with the fluid motion the Kling family is known for.
| Criterion | Veo 3.1 Fast | Kling 3.0 |
|---|---|---|
| Clip length | 4, 6 or 8 s | 3–15 s |
| Resolution | 720p · 1080p | 720p |
| Native audio | Yes — optional, priced higher with sound | Yes — optional, priced higher with sound |
| Faces & human motion | Good | Signature strength |
| Negative prompt | Yes | Yes |
| Seed | Yes | No |
| First/last frame | Yes | Yes |
| Reference pictures | Up to 3 | Up to 4 |
| Native aspect ratios | 16:9 · 9:16 | 16:9 · 9:16 · 1:1 |
| Price per clip | 344 cr / 8 s with sound · 272 silent | 270 cr / 5 s · 540 cr / 10 s with sound |
| Plan access | Hobby and up | Hobby and up |
| Content policy | Moderated upstream by the provider | Moderated upstream by the provider |
Engine facts as served on eroq, September 2026. Prices in credits; 1 credit ≈ $0.01 at the entry pack.
Which one to pick
- →A beat that fits in 8 seconds, delivered at 1080p or revised with a seed: Veo 3.1 Fast.
- →A person who has to stay recognisable while they move, or a take longer than 8 seconds: Kling 3.0, up to 15 seconds, with four reference pictures for the cast.
- →Both bill the soundtrack per second — switch it off when narration from the voice studio will sit under the cut.
Questions
Can I make a Veo clip longer than 8 seconds?
No. Veo 3.1 Fast renders 4, 6 or 8 seconds, and the duration pills show only those. Pick Kling 3.0, which runs to 15, when a single take has to be longer.
Can Kling render sound?
Yes — Kling 3.0 renders sound with the picture when the soundtrack is on, at 54 credits a second instead of 36. For narration, the voice studio produces an MP3 you lay under the cut yourself.
Which is cheaper per second?
At 720p with sound, Veo 3.1 Fast is 43 credits a second and Kling 3.0 54; silent, 34 and 36. Veo stops at 8 seconds, Kling goes to 15.
Does either one keep a character consistent across clips?
Only through you. Neither remembers anything between renders, so consistency comes from references: a saved Character rides as a reference picture — up to three on Veo 3.1 Fast, four on Kling 3.0 — or a photo you attach becomes the start frame.
Is the dialogue lip-synced?
Engines with sound render speech as part of the shot rather than syncing to a file you provide. eroq has no lip-sync tool, so you cannot lay a voice track over an existing clip and have the mouth match.
Judge it on your own shots — 40 free credits, no card.