Grok Video vs Veo 3.1 Fast
These two never price the same render: Grok Video sells clips of 5s and 10s and Veo 3.1 Fast sells 4s, 6s and 8s, so there is no like-for-like row to put them on and any straight price comparison would be comparing different products. They do both price 720p, though, and a second of 720p is a second of 720p whichever model made it, so the comparison that does hold is credits per second at the same resolution: 720p is 14 credits a second on Grok Video against 30 on Veo 3.1 Fast. Grok Video is the better rate at the one resolution they share. Those are each model's best rate at that resolution, taken from the tables below. In practice, take Grok Video if you need one continuous clip longer than 8 seconds, and Veo 3.1 Fast if the deliverable has to be 1080p.
We run Grok Video (xAI) and Veo 3.1 Fast (Google) ourselves, on our own provider accounts, inside the same studio and off the same credit balance. Everything below is read out of the catalogue that prices your renders, so the numbers are the ones your account is actually charged. What you will not find here is a quality verdict: we hold no benchmark that would make one honest, so every claim on this page is a capability or a price you can check.
Grok Video vs Veo 3.1 Fast: the specs
Every cell below is read from the catalogue that our generator and our billing run on, so it is what you get and what you are charged, not what a vendor page advertises. Two rows are worth reading carefully: where the render runsis the platform we actually dispatch to, which is not always the one a model’s Replicate name implies, and how the length is set separates the models you give a duration to from the ones whose clip runs as long as the speech does.
| Spec | Grok Video | Veo 3.1 Fast |
|---|---|---|
| Vendor | xAI | |
| Catalogue label | Grok Video | Veo 3.1 Fast |
| Where the render runs | Replicate | Replicate |
| Provider model | xai/grok-imagine-video | google/veo-3.1-fast |
| Max duration, one render | 10s | 8s |
| How the length is set | You pick it, per render | You pick it, per render |
| Priced clip lengths | 5s and 10s | 4s, 6s and 8s |
| Priced resolutions | 480p and 720p | 720p and 1080p |
| Audio | Generated with the picture, same pass | Generated with the picture, same pass |
| Reference image required | Yes | Yes |
| Reference images per render | 1 | 1 |
| Cheapest render | 50 credits (5s at 480p) | 120 credits (4s at 720p) |
| Best rate per second | 10 credits/sec (5s at 480p) | 30 credits/sec (4s at 720p) |
| Credit range | 50 to 140 | 120 to 245 |
| On the free 3-day trial | On the free trial | On the free trial |
| Announced end date | None announced | None announced |
Cost: compared per second, not per render
Grok Video and Veo 3.1 Fast do not sell a single clip length and resolution in common. Grok Video is priced at 5s and 10s, Veo 3.1 Fast at 4s, 6s and 8s. Putting a 5s render next to a 4s one and calling the gap a price difference would be comparing two different products.
What they do have in common is resolution. Both price 720p, and a second of 720p is a second of 720pwhichever model made it. So the honest unit here is credits per second at the same resolution, taken from each model’s best tier at that resolution.
| Resolution | Grok Video | Veo 3.1 Fast | Difference |
|---|---|---|---|
| 720p | 14 credits/sec best on 5s at 720p, 70 credits | 30 credits/sec best on 4s at 720p, 120 credits | 16 credits a second cheaper on Grok Video |
Multiply a row by the length you actually need and you have the comparison this page cannot make for you. At those rates ten seconds of 720p works out at roughly 140 credits of Grok Video against 300 of Veo 3.1 Fast, before you round up to the lengths each one actually sells (5s and 10s; 4s, 6s and 8s).
Every tier each one sells
Grok Video
| Render | Credits | Per sec |
|---|---|---|
| 5s at 480p | 50 | 10 |
| 5s at 720p | 70 | 14 |
| 10s at 480p | 100 | 10 |
| 10s at 720p | 140 | 14 |
Veo 3.1 Fast
| Render | Credits | Per sec |
|---|---|---|
| 4s at 720p | 120 | 30 |
| 4s at 1080p | 120 | 30 |
| 6s at 720p | 180 | 30 |
| 6s at 1080p | 180 | 30 |
| 8s at 720p | 245 | 30.6 |
| 8s at 1080p | 245 | 30.6 |
Credit costs, not dollars: what a credit costs you depends on the plan, and all three plans are listed on the pricing page.
Which one to pick
Each line below traces back to a single difference in the tables above. Where a model has no measurable advantage, that is what it says.
Pick Grok Video if
- You need one continuous clip longer than 8 secondsGrok Video runs to 10s in a single call. Veo 3.1 Fast caps at 8s, so anything longer has to be cut together from more than one render.
- You want a rough pass before spending on the finished cutGrok Video prices a 480p tier from 50 credits. The lowest resolution Veo 3.1 Fast sells is 720p.
- You want the cheapest possible render to test an idea onGrok Video starts at 50 credits (5s at 480p). The cheapest thing Veo 3.1 Fast sells is 120 credits.
- You are buying seconds of finished video rather than a specific clip lengthGrok Video is the better rate at every resolution the two share (720p): 14 credits a second against 30 at 720p.
Pick Veo 3.1 Fast if
- The deliverable has to be 1080pVeo 3.1 Fast prices a 1080p tier, from 120 credits for 4s at 1080p. Grok Video tops out at 720p.
- You want the higher resolution without paying more for itVeo 3.1 Fast charges the same credits for 720p and 1080p at any given length. Grok Video charges more for its higher tiers.
What they have in common
A comparison that manufactures a difference is worse than no comparison, so here is where Grok Video and Veo 3.1 Fast genuinely match.
- Both need a reference image. Neither will render from a prompt on its own, and the input carries one image on either.
- Both come back with their own audio, so neither needs a separate voice pass in the chain.
- Both price 720p.
- Neither has an announced end date.
- Both are dispatched to Replicate from our own account, Grok Video as xai/grok-imagine-video and Veo 3.1 Fast as google/veo-3.1-fast.
- Both spend from that one balance on every plan, so moving a campaign from Grok Video (from 50 credits a render) to Veo 3.1 Fast (from 120) costs you nothing but the credit difference.
Want the longer read rather than the numbers? Grok Video vs Veo 3.1: Which Model for Your Next Batch of Hooks? covers the same matchup as an article.
One credit balance, every model
Grok Video and Veo 3.1 Fastboth spend from the same balance, so a plan is not a commitment to one of them. Here is what each plan’s credits buy on the two models on this page, measured in seconds of finished video.
| Plan | Credits a month | Grok Video | Veo 3.1 Fast |
|---|---|---|---|
| Starter $49 a month, or $34 billed annually | 5,000 | 357 to 500 seconds | 163 to 166 seconds |
| Growth $99 a month, or $69 billed annually | 12,000 | 857 to 1,200 seconds | 392 to 400 seconds |
| Agency $199 a month, or $139 billed annually | 25,000 | 1,785 to 2,500 seconds | 816 to 833 seconds |
The low end of each range is the model’s dearest priced tier and the high end its cheapest, both from the tables above, so a month spent entirely at 1080p sits at the bottom and a month of 480p drafts near the top. Mixing models moves it in between. On a paid plan, credits are the only limit: no cap on how many renders you make and no per-model licence. Annual billing is 30% off (Starter saves $180 a year, Agency $720). Both run during the free 3-day trial, so you can compare them before any of this applies.
Grok Video vs Veo 3.1 Fast: frequently asked questions
Which is cheaper, Grok Video or Veo 3.1 Fast?
These two never price the same render: Grok Video sells clips of 5s and 10s and Veo 3.1 Fast sells 4s, 6s and 8s, so there is no like-for-like row to put them on and any straight price comparison would be comparing different products. They do both price 720p, though, and a second of 720p is a second of 720p whichever model made it, so the comparison that does hold is credits per second at the same resolution: 720p is 14 credits a second on Grok Video against 30 on Veo 3.1 Fast. Grok Video is the better rate at the one resolution they share. Those are each model's best rate at that resolution, taken from the tables below.
Can Grok Video and Veo 3.1 Fast render the same clip?
Not at the same length. Grok Video sells 5s and 10s and Veo 3.1 Fast sells 4s, 6s and 8s, and there is no length both price, so a Grok Video render and a Veo 3.1 Fast render are never the same product. What they do share is resolution: both price 720p. Per second of finished video that works out at 14 against 30 credits at 720p. Multiply by the length you actually need and you have the real comparison.
How long can a single Grok Video or Veo 3.1 Fast clip be?
Grok Video caps at 10s and prices 5s and 10s. Veo 3.1 Fast caps at 8s and prices 4s, 6s and 8s. Both are per-render limits, so a longer ad is several renders cut together rather than one long generation.
What resolutions do Grok Video and Veo 3.1 Fast render at?
Grok Video is priced at 480p and 720p. Veo 3.1 Fast is priced at 720p and 1080p, all at the same credit cost for a given length. Those are the tiers you can actually buy, not the tiers the vendors advertise.
Do Grok Video and Veo 3.1 Fast need a reference image?
Both do. Neither Grok Video nor Veo 3.1 Fast will render from a text prompt alone, so you need a product shot or an avatar frame first.
How do Grok Video and Veo 3.1 Fast handle audio?
The same way. Grok Video generates its audio in the same pass as the picture, so there is no separate voice step to run or pay for, and Veo 3.1 Fast works identically. Neither one needs a voice model bolted on afterwards.
Do I need a separate plan for each model?
No. Every plan is one credit balance that spends on any model we run, so the same subscription renders a Grok Video test at 50 credits and a Veo 3.1 Fast test at 120 and you compare them on your own footage. There is no per-model licence, and on a paid plan credits are the only thing that runs out rather than a render count.
Can I try Grok Video and Veo 3.1 Fast on the free trial?
Yes, both. Grok Video and Veo 3.1 Fast each run during the free 3-day trial, which caps a single trial render at 250 credits. Grok Video fits that from 50 credits and Veo 3.1 Fast from 120, so you can put the same script through both before you pay anything.
Where do these Grok Video and Veo 3.1 Fast numbers come from?
From the accounts the renders actually run on. Grok Video is dispatched to Replicate as xai/grok-imagine-video and Veo 3.1 Fast to Replicate as google/veo-3.1-fast, both ours. The 4 priced tiers listed for Grok Video and the 6 priced tiers for Veo 3.1 Fast are read at build time from the same price table that debits your balance when a render finishes, and the capabilities come from the record the generator reads to build each request, so a reprice or a new tier rewrites this page instead of leaving a stale number on it. What you will not find is a quality or realism score for either one: we hold no benchmark that would make one honest.
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