Short answer: pick Veo 3.1 when you want a low cost per second, a fixed 8-second shot, or a 4K render. Pick Seedance 2.0 when you need a clip shorter or longer than 8 seconds, a wide or square frame, or a long, detailed prompt. For Veo 3.1 vs Seedance 2.0 at 720p, AgentReel charges 15 credits for an 8-second Veo 3.1 Fast clip and 52 credits for a 5-second Seedance 2.0 clip.
Both models sit behind the same prompt box in AgentReel, and both run through the Kie.ai API. Veo 3.1 comes from Google. Seedance 2.0 comes from ByteDance. This comparison uses the parameters in the Kie API documentation and the prices AgentReel charges today. It does not use a benchmark score, because no neutral benchmark covers both models with the same prompts.
Veo 3.1 vs Seedance 2.0 at a glance
| Veo 3.1 (Google) | Seedance 2.0 (ByteDance) | |
|---|---|---|
| Tiers in the API | Quality, Fast, Lite | One model |
| Duration in the API | 4, 6 or 8 seconds | 4 to 15 seconds, or -1 for auto |
| Duration on AgentReel | 8 seconds, fixed | 5, 10 or 15 seconds |
| Resolution in the API | 720p, 1080p, 4K | 480p, 720p, 1080p, 4K (H.265) |
| Resolution on AgentReel | 720p, 1080p, 4K | 480p, 720p, 1080p |
| Aspect ratios in the API | 16:9, 9:16, Auto | 16:9, 9:16, 1:1, 4:3, 3:4, 21:9, adaptive |
| Native audio | Yes, background audio by default | Yes, on by default |
| Image input | First frame, first + last frame | First frame, first + last frame |
| References in the API | 1 to 3 images (Fast and Lite, 8 s only) | Up to 9 images, 3 videos, 3 audio clips |
| Prompt limit on AgentReel | 5,000 characters | 20,000 characters |
| AgentReel price, one 720p clip | 15 credits for 8 s (Fast) | 52 credits for 5 s |
Prices are AgentReel credits on October 20, 2026. Current prices always show on the Generate button before a job starts. See pricing for credit packs.
What the Kie API supports and what AgentReel exposes
- Veo 3.1 in the Kie API: three modes (text to video, first and last frames, reference to video), 4, 6 or 8 seconds, 720p, 1080p or 4K, and options for prompt translation and a watermark.
- Veo 3.1 on AgentReel: text to video and first and last frames (one or two images). The clip is always 8 seconds. Reference to video is not offered. Aspect ratio is 16:9 or 9:16.
- Seedance 2.0 in the Kie API: first frame, first and last frame, or multimodal reference, 4 to 15 seconds, up to 4K, sound on or off, and web search for text to video.
- Seedance 2.0 on AgentReel: 5, 10 or 15 seconds at 480p, 720p or 1080p. Sound is always on. With a start image, the ratio is set to adaptive.
What Veo 3.1 does best
A frame from the Veo 3.1 example video on Kie's Veo 3.1 page.
Three tiers, one price per clip
Veo 3.1 has three tiers. The Kie docs call Quality the flagship with the highest fidelity, Fast the cost-efficient variant, and Lite the most cost-effective tier for high-volume work. On AgentReel you pick the tier with the variant setting. Because every clip is 8 seconds, each tier has one price per resolution. A 720p clip costs 8 credits on Lite, 15 on Fast and 63 on Quality.
Low cost per second
The fixed 8 seconds makes Veo 3.1 cheap per second at the lower tiers. Lite at 720p works out to 1 credit per second. Fast at 720p is about 1.9 credits per second. Seedance 2.0 at its lowest setting, 480p, costs 4.8 credits per second.
4K and vertical video
Veo 3.1 renders 4K on AgentReel, and Seedance 2.0 does not (its 4K is in the Kie API only). An 8-second 4K clip costs 38 credits on Lite, 45 on Fast and 93 on Quality. The Kie docs also say that both 16:9 and 9:16 support 1080p and 4K, so vertical clips for short-form feeds keep full resolution.
Where it is limited
On AgentReel every Veo 3.1 clip is 8 seconds. You cannot ask for 5 or 15 seconds. The frame is 16:9 or 9:16 only. The prompt limit on AgentReel is 5,000 characters. The Kie docs also note that audio may be suppressed in rare cases when a scene is deemed sensitive.
What Seedance 2.0 does best
A frame from the Seedance 2.0 example video on Kie's Seedance 2.0 page.
Reference-driven video
Seedance 2.0 has three input modes, and they do not mix: first frame, first and last frame, or multimodal reference. In the Kie API the reference mode takes up to 9 images, 3 videos (2 to 15 seconds each, 15 seconds in total) and 3 audio clips. You describe in the prompt how each reference should appear. Veo 3.1 takes at most 3 reference images, and only on the Fast and Lite tiers.
Flexible length, frame and prompt
Seedance 2.0 gives you 5, 10 or 15 seconds on AgentReel, so a scene longer than 8 seconds fits in one render. It also offers 1:1, 4:3, 3:4 and 21:9, which Veo 3.1 does not. The prompt can hold 20,000 characters, four times the Veo 3.1 limit on AgentReel. That is enough for a full shot list with timing, camera notes and dialogue.
Where it costs more
Seedance 2.0 bills per second, and the rate climbs fast with resolution. On AgentReel, 5 seconds costs 24 credits at 480p, 52 at 720p and 128 at 1080p. A 15-second 1080p clip costs 383 credits. Draft at 480p, then render the keeper at a higher resolution.
Price per clip and per second on AgentReel
Veo 3.1 is always 8 seconds, so compare it with Seedance 2.0 per clip and per second.
| Model and setting | 720p | 1080p | 4K |
|---|---|---|---|
| Veo 3.1 Lite, 8 s | 8 (1.0/s) | 9 (1.1/s) | 38 (4.8/s) |
| Veo 3.1 Fast, 8 s | 15 (1.9/s) | 17 (2.1/s) | 45 (5.6/s) |
| Veo 3.1 Quality, 8 s | 63 (7.9/s) | 64 (8.0/s) | 93 (11.6/s) |
| Seedance 2.0, 5 s | 52 (10.4/s) | 128 (25.6/s) | not offered |
| Seedance 2.0, 10 s | 103 (10.3/s) | 255 (25.5/s) | not offered |
Seedance 2.0 also has a 480p setting: 24 credits for 5 seconds and 48 for 10 seconds, or 4.8 credits per second. Every row includes sound, because both models generate audio by default.
Which one should you choose?
- Many cheap drafts of one idea: Veo 3.1 Lite or Fast.
- A 4K clip: Veo 3.1.
- A vertical 9:16 clip at 1080p or 4K: Veo 3.1.
- A clip shorter or longer than 8 seconds: Seedance 2.0.
- A 1:1, 4:3 or 21:9 frame: Seedance 2.0.
- A long, detailed script prompt: Seedance 2.0.
- A transition between two of your own images: both work. Start on Veo 3.1 Fast for cost, and switch if the motion is not right.
For a video ad with a script, voice-over and captions, use the AI video ad generator. It picks the clips for you. To compare other models, read Seedance 2.0 vs Kling 3.0 and Wan 3.0 vs MiniMax H3.
FAQ
Is Veo 3.1 better than Seedance 2.0?
Neither is better for every job. Veo 3.1 is cheaper per second and renders 4K on AgentReel. Seedance 2.0 offers more lengths, more aspect ratios, more references and longer prompts.
Which model is cheaper on AgentReel?
Veo 3.1. An 8-second 720p clip costs 15 credits on Fast and 8 on Lite. A 5-second 720p clip on Seedance 2.0 costs 52 credits.
Why is Veo 3.1 always 8 seconds on AgentReel?
The Kie API offers 4, 6 or 8 seconds, but AgentReel offers only the 8-second length. As a result, each tier has one price per resolution.
Do both models generate sound?
Yes. The Kie docs say every Veo 3.1 video ships with background audio by default. Seedance 2.0 generates audio by default, and AgentReel keeps it on.
Can I use my own image as the first frame?
Yes. Both models accept a first frame, or a first and a last frame. Upload one or two images in the AI video generator.
How we compared
We read the Kie.ai API reference for Veo 3.1 and Seedance 2.0 on October 20, 2026. Prices come from the AgentReel model catalog on the same day, which is the same table that charges your account. The images are frames from the example videos on Kie's model pages.
