AI video models · compared
Veo 3.1 vs Veo 3.1 Fast
Veo 3.1 and Veo 3.1 Fast are both AI video models that run on one varg API key. This page puts what the varg catalog states about each side by side: the price, how it is billed, the limits of the input, what it takes and the typical time. It ranks neither on quality.
- Veo 3.1
- From $0.80 per run from $0.20/s
- Veo 3.1 Fast
- From $0.40 per run from $0.10/s
Every model is billed at its provider's price with no markup, from one credit balance: 1 credit is $0.01.
Veo 3.1 vs Veo 3.1 Fast: side by side
Every row is read from the varg catalog and each model's input schema. A "from" price is the cheapest request the catalog states for that model, at its own cheapest settings. For the exact price of a request, send its body to POST https://api.varg.ai/v2/estimate.
| Fact | Veo 3.1 | Veo 3.1 Fast |
|---|---|---|
| Made by | ||
| Takes and makes | Text to video, Image to video | Text to video, Image to video |
| Price | From $0.80 per run | From $0.40 per run |
| Rates on the cheapest route | Resolution 4k: $0.60/s; Audio off: $0.20/s; Other: $0.40/s; Minimum charge: $0.80 | Resolution 4k: $0.35/s; Audio off: $0.10/s; Other: $0.15/s; Minimum charge: $0.40 |
| Billed | per second | per second |
| Clip length | 4, 6 or 8 s | 4, 6 or 8 s |
| Resolutions you can set | 720p, 1080p, 4k | 720p, 1080p, 4k |
| Audio switch | Yes: "audio": true asks for a native audio track | Yes: "audio": true asks for a native audio track |
| Typical time | ~2 min | ~60 s |
| Routes | 3 on fal | 3 on fal |
| Model id | veo_3_1 | veo_3_1_fast |
Which to pick
Each line is a difference between two rows of the table. None of it says which model's output looks better: that depends on the prompt.
Pick Veo 3.1 when
you prefer its output. On price, limits and inputs the catalog states no advantage for Veo 3.1 over Veo 3.1 Fast, so run one prompt on both and compare.
Pick Veo 3.1 Fast when
- you want the lower starting price: from $0.40 per run, against from $0.80 per run, each at the model's own cheapest settings.
- you want the lower starting rate: from $0.10/s, against from $0.20/s; the table gives each model's rate by setting.
- your request sets resolution 4k: its cheapest route charges $0.35/s there, against $0.60/s.
- your request sets audio off: its cheapest route charges $0.10/s there, against $0.20/s.
- you want the shorter typical wait: ~60 s, against ~2 min, by the catalog's estimates.
Call Veo 3.1 and Veo 3.1 Fast
One endpoint and one API key for both: POST https://api.varg.ai/v2/tools/video/call with Authorization: Bearer $VARG_API_KEY. It answers 202 with a job right away; poll GET /v2/jobs/{id} until its status is completed.
Veo 3.1
curl -X POST https://api.varg.ai/v2/tools/video/call \
-H "Authorization: Bearer $VARG_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "veo_3_1",
"prompt": "A lighthouse keeper climbs the spiral stairs at dusk, waves crashing outside.",
"aspect_ratio": "16:9",
"resolution": "720p"
}'vargai call_tool --tool video '{"model":"veo_3_1","prompt":"A lighthouse keeper climbs the spiral stairs at dusk, waves crashing outside.","aspect_ratio":"16:9","resolution":"720p"}'Veo 3.1 Fast
curl -X POST https://api.varg.ai/v2/tools/video/call \
-H "Authorization: Bearer $VARG_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "veo_3_1_fast",
"prompt": "A lighthouse keeper climbs the spiral stairs at dusk, waves crashing outside.",
"aspect_ratio": "16:9",
"resolution": "720p"
}'vargai call_tool --tool video '{"model":"veo_3_1_fast","prompt":"A lighthouse keeper climbs the spiral stairs at dusk, waves crashing outside.","aspect_ratio":"16:9","resolution":"720p"}'How billing works
Every model is billed at its provider's price with no markup, from one credit balance: 1 credit is $0.01. varg's fee is on the top-up, not on the run: 5.5% of the credits you buy ($0.80 at the least), or 8% for a team workspace. Pricing
Veo 3.1 vs Veo 3.1 Fast: questions
- Which is cheaper, Veo 3.1 or Veo 3.1 Fast?
- Veo 3.1 Fast starts lower: from $0.40 per run, against from $0.80 per run for Veo 3.1. By starting rate, Veo 3.1 Fast is lower: Veo 3.1 from $0.20/s, Veo 3.1 Fast from $0.10/s. Those are each model's cheapest settings, and the price of a request depends on what it asks for: the table lists each model's rates. With resolution 4k, Veo 3.1 Fast is lower: Veo 3.1 $0.60/s, Veo 3.1 Fast $0.35/s, each on its cheapest route. With audio off, Veo 3.1 Fast is lower: Veo 3.1 $0.20/s, Veo 3.1 Fast $0.10/s, each on its cheapest route. For the exact price of a request before you run it, send the same body to POST https://api.varg.ai/v2/estimate.
- Which makes longer clips, Veo 3.1 or Veo 3.1 Fast?
- Both take up to 8 seconds in one request, by their input schemas.
- Which resolutions can I set on Veo 3.1 and Veo 3.1 Fast?
- Veo 3.1: 720p, 1080p, 4k. Veo 3.1 Fast: 720p, 1080p, 4k. These are the tiers the "resolution" field of each model's input schema lists; a model can also have a default size that is not one of them.
- Can I use Veo 3.1 and Veo 3.1 Fast with one API key?
- Yes. Both run on varg behind POST https://api.varg.ai/v2/tools/video/call with one API key and one credit balance: send "model": "veo_3_1" or "model": "veo_3_1_fast". Every model is billed at its provider's price with no markup, from one credit balance: 1 credit is $0.01.