When Is It Worth Rendering AI Video in 4K?
Render in 4K for the shots an audience will actually look at, and for anything you will reframe or crop in the edit. For everything else, 1080p is the better buy: on an eight-second Veo 3.1 clip, 4K costs 68 percent more than 720p and 25 percent more than 1080p, and no amount of post-production will recover resolution you did not generate.
Resolution is the one budget decision in AI video you cannot walk back. There is no video upscaler, so the resolution you pick at generation time is the resolution you ship.
That makes it worth five minutes of thought per shot rather than a single project-wide setting. Here is the arithmetic and the decision rule.
What does each resolution actually cost?
On Veo 3.1 at eight seconds, 440 credits at 720p, 590 at 1080p, and 740 at 4K. The premium is not linear: most of the price gap sits between 720p and 1080p, which makes 1080p the awkward middle and 4K cheaper than people expect.
| Model | 720p | 1080p | 4K | 720p to 4K premium |
|---|---|---|---|---|
| Veo 3.1, 8 seconds | 440 | 590 | 740 | +68% |
| Veo 3.1 Fast, 8 seconds | 220 | 320 | 400 | +82% |
| Seedance 1.5 Pro, per second, no audio | 14 | 30 | Not offered | n/a |
| Seedance 1.5 Pro, per second, with audio | 28 | 60 | Not offered | n/a |
The number worth internalising is the last step. Once you have decided a shot deserves 1080p, moving it to 4K on Veo 3.1 costs another 150 credits, about 25 percent. That is a much easier decision than the one before it.
Can you upscale AI video afterwards?
No. FORGR's upscaler works on images, not video, so there is no way to rescue a low-resolution clip in post. This is the reason resolution deserves a per-shot decision rather than a global default.
Image upscaling is 15 credits and genuinely useful for stills, including the storyboard panels you approve before generating motion. It does not extend to video, and no combination of settings turns a 720p clip into a 4K one.
- Stills can be rescued. Approve a panel, upscale it for 15 credits if you need the detail.
- Clips cannot. A regenerated shot at a higher resolution is a new generation at full price, and it will not match the old one frame for frame.
- So decide before you generate. The cost of getting it wrong is the whole shot, not a top-up.
Which shots deserve 4K?
Shots the audience looks at directly, shots you intend to reframe in the edit, and anything going to a large screen or a client deliverable. Coverage, blocking tests, and shots that will sit behind titles do not need it.
| Shot type | Recommended | Why |
|---|---|---|
| Close-up carrying a performance | 4K | Faces are where detail is most visible and drift is most noticed |
| Establishing wide you may crop later | 4K | Cropping is the one thing that genuinely consumes resolution |
| Standard coverage in a cut sequence | 1080p | Seen briefly, between other shots, rarely on its own |
| Blocking and framing tests | 720p or 480p | You are judging composition, not detail |
| Shots sitting behind titles or heavy grade | 1080p | Detail is about to be obscured anyway |
| Social-first vertical delivery | 1080p | Compression at the platform will erase most of the difference |
What does a sensible resolution ladder look like?
Test cheap, block cheap, finish high. Run framing and identity passes at the lowest resolution that lets you judge them, then promote only the shots that survive.
- 1
Judge composition at the bottom of the ladder
Seedance 1.5 Pro at 480p is 8 credits per second. You can see whether a frame works long before you can see skin texture.
- 2
Judge identity on stills, not clips
A 15-credit still tells you whether the character held. Spending video credits to answer a character question is the most common budget mistake in narrative work.
- 3
Promote only the approved shots
Once framing and identity are settled, regenerate the keepers at delivery resolution. Expect a different take and accept it.
- 4
Spend the 4K budget where eyes go
Close-ups and anything you will crop. In a six-shot scene that is usually two shots, not six.
Applied to the six-shot scene in budgeting an AI short film by usable shots, finishing two shots at 4K instead of all six is the difference between a comfortable Director month and an uncomfortable one.
Frequently asked questions
How much more does 4K AI video cost?
On an eight-second Veo 3.1 clip, 740 credits at 4K against 440 at 720p, so about 68 percent more. Against 1080p at 590 credits it is only about 25 percent more, at the 7 July 2026 rates.
Can you upscale AI video to 4K afterwards?
Not in FORGR. The upscaler is for images only, at 15 credits per upscale. Video resolution is fixed at generation time, so a low-resolution clip cannot be rescued in post.
Is 4K worth it for AI video?
For close-ups carrying a performance, and for any shot you might crop or reframe in the edit. For ordinary coverage inside a cut sequence, 1080p is usually the better spend.
Do I need a higher plan to generate 4K?
No. Every model at every resolution, including Veo 3.1 in 4K, is unlocked on every paid plan from $9.99 a month. Plans differ in monthly credits and parallel generations, not in which resolutions you can use.
What resolution should I test at?
The lowest one that lets you judge what you are testing. Composition and blocking read fine at 480p. Identity questions should be answered on stills rather than on video at any resolution.
Spend the resolution where it shows
Every model at every resolution is unlocked on every paid plan, and credits never expire, so an unspent 4K budget carries into next month.
See what generations cost