Kling 4.0 vs Veo 3.1 Fast
Both run on one Varosity key, over the API or from your agent, at the provider's list price with no markup. Failed renders are never billed.
| Feature | Kling 4.0 | Veo 3.1 Fast |
|---|---|---|
| Price on Varosity credits | $0.157/s | $0.15/s |
| An 8-second request | $1.26 (8s produced) | $1.20 (8s produced) |
| Clip lengths | 3–30s | 4, 6, 8s |
| Native audio | Yes | Yes |
| Aspect ratios | 16:9 · 9:16 · 1:1 · 21:9 | 16:9 · 9:16 |
| Inputs | text-to-video · image-to-video | text-to-video · image-to-video |
| Your own provider key | No (Varosity credits only) | No (Varosity credits only) |
| Trade-offs | slow: a 5s clip can take about 10 minutes · 720p only | — |
| Model ID | ws-kling-4.0 | veo-3.1 |
Pick Kling 4.0 for
Kling 4.0, Kling's newest model, on Credits today: 720p clips with native stereo audio and single takes of 3 to 30 seconds.
Instead: kling-3.0 for fast 5 or 10s Kling clips; veo-3.1 for 4-8s lip-sync talking heads; grok-imagine-video for cheap audio clips up to 15s. Pick another model when the result is needed within a few minutes.
Kling 4.0 details and examplePick Veo 3.1 Fast for
Talking-head and dialogue clips with synced native audio at a lower price than full Veo; the default Veo for iteration.
Instead: veo-3.1-quality for hero shots; veo-3.1-lite for bulk drafts; kling-3.0 if you need 10s in one take.
Veo 3.1 Fast details and example