On VdoBloom, 2K and 4K are worth the extra credits only when the finished frame will be seen large, re-cropped or graded — for a 9:16 phone feed, 1080p is where quality stops improving but the credit cost keeps climbing. The gap is not small. A 5-second Seedance 2 clip costs 203 credits at 1080p and 414 credits at 4K, so the same shot goes from about $10.15 to about $20.70 at the Lite rate of $0.05 per credit. That is a real decision, and it should be made per shot rather than per habit.

What the tiers actually are

VdoBloom exposes resolution as a quality selector on the models that support it, and every model publishes its own ladder. Seedance 2 offers 480p, 720p, 1080p and 4K. Kling 3.0 Omni offers 720p, 1080p and 4K. LTX-2 Fast is unusual in that its middle rung is 1440p rather than 1080p, giving a genuine 2K option. Gemini Omni Flash adds a cheap 360p draft tier below the rest. WAN 2.7 stops at 1080p. No model invents detail it did not generate, so a 4K render is a 4K render, not an upscale of a smaller one — which is exactly why it costs more.

The real credit cost of moving up a tier

These are the live numbers from the credit engine, converted at the Lite rate where $15 buys 300 credits, so one credit is $0.05. Video rows are text-to-video unless noted.

Model and clip	Tier	Credits	Cost	Step up from the tier below
Seedance 2, 5s	480p	38	$1.90	—
Seedance 2, 5s	720p	82	$4.10	+116%
Seedance 2, 5s	1080p	203	$10.15	+148%
Seedance 2, 5s	4K	414	$20.70	+104%
Kling 3.0 Omni, 5s	720p	40	$2.00	—
Kling 3.0 Omni, 5s	1080p	54	$2.70	+35%
Kling 3.0 Omni, 5s	4K	134	$6.70	+148%
LTX-2 Fast, 10s	1080p	32	$1.60	—
LTX-2 Fast, 10s	1440p (2K)	57	$2.85	+78%
LTX-2 Fast, 10s	4K	128	$6.40	+125%
Gemini Omni, 8s	360p / 720p / 1080p	60	$3.00	identical price
Gemini Omni, 8s	4K	108	$5.40	+80%
WAN 2.7, 5s	720p	32	$1.60	—
WAN 2.7, 5s	1080p	48	$2.40	+50%

Two things jump out of that table. First, the size of the jump is model-specific: 1080p on Kling 3.0 Omni costs 35% more than 720p, while on Seedance 2 it costs 148% more. Second, Gemini Omni charges the same credits for 360p, 720p and 1080p — selecting 1080p there is a free upgrade, and selecting anything lower is simply wasting quality you already paid for. Never assume the tier premium is a fixed multiplier across the catalogue; check the model you are actually using.

When the extra credits are genuinely worth it

Spend the extra on resolution when at least one of these is true:

The frame will be re-cropped. If you plan to punch in on a 16:9 render to make a 9:16 cut, you throw away most of the horizontal pixels. Starting at 4K leaves a 1080p-class crop after the punch-in; starting at 1080p leaves mush.
The output goes to a big screen. Trade-show loops, TV spots, in-store displays and desktop hero videos are watched at a viewing distance where 720p artefacts are obvious.
It is a product shot with fine detail. Fabric weave, engraved text, jewellery, packaging copy and screen UI all fall apart first. A rotating render from Product 360 is the clearest case in the whole catalogue for paying up.
The clip will be graded or composited. More pixels survive colour grading, stabilisation and keying with fewer visible blocks.

When it is a waste

Skip the upgrade when the clip is a social-first vertical destined for a feed that re-encodes everything anyway; when you are still iterating on prompt and composition; when the model has native audio and the audience will judge sync before sharpness; or when the shot is dominated by motion blur, haze, smoke or shallow depth of field, where there is little fine detail for the extra pixels to resolve. Draft low, finish high: twenty 480p Seedance 2 drafts cost 760 credits, while twenty 4K drafts cost 8,280.

The middle path: render at 1080p, upscale after

VdoBloom carries a Topaz video upscaler, and it is usually the cheaper way to reach a 4K deliverable. Upscaling is billed per second of source video: about 3.2 credits per second at 1x and 2x, about 5.6 credits per second at 4x, with a 30-credit minimum. A 5-second clip upscaled 4x therefore costs the 30-credit floor — $1.50. Compare the two routes to a 4K Seedance 2 shot: native 4K is 414 credits, while 1080p plus a 4x upscale is 203 + 30 = 233 credits, a saving of 181 credits or about $9.05 per shot.

The honest caveat: an upscale interpolates detail rather than generating it. On faces and text you can sometimes see the difference against a native 4K render. On landscapes, motion and product B-roll you generally cannot. Try the upscale route first and only go native 4K if the upscale visibly fails.

Images follow different rules

Image models on text to image price resolution far more gently, and one of them does not charge for it at all. Nano Banana Pro costs 18 credits at both 1K and 2K and 24 credits at 4K — the 2K tier is free, so there is no reason to render it at 1K. GPT Image 2 runs 3 credits at 1K, 5 at 2K and 8 at 4K, the whole ladder costing less than half a credit’s worth of most video tiers. Riverflow 2.0 Pro is 18 credits for 1K and 2K, 27 for 4K. For stills, default to the top tier; the premium is pennies and a 4K still crops and prints without complaint.

A worked example

Say you need one 5-second hero clip for a landing page plus three vertical social cuts from the same shot, and you are on the Lite plan with 300 credits.

Draft the shot four times on Kling 3.0 Omni at 720p to lock composition and prompt: 4 × 40 = 160 credits. The same four drafts on Seedance 2 at 1080p would have been 812.
Render the winner once at 1080p on the same model: 54 credits. Running total 214.
Upscale that finished 5-second clip 4x for the desktop hero: 30 credits. Running total 244.
Crop the 4K master to 9:16 three times in your editor. No further credits.

That is a 4K web hero plus three vertical cuts for 244 credits, about $12.20, inside a single month of Lite. The naive route — four 4K Seedance 2 drafts plus a 4K final — would have been 2,070 credits, roughly $103.50. Same deliverable, eight times the bill. Check current plans and credit packs before you commit, and remember that one-time packs never expire, so buying credits for a one-off 4K job does not lock you into a subscription. The free tier’s 10 credits cover a low-resolution draft or two, and the Seedance prompt library cuts how many drafts you need.

Frequently asked questions

Does a higher resolution make the motion better?

No. Resolution changes pixel count, not the model’s understanding of physics, anatomy or camera movement. If limbs warp at 720p they will warp at 4K, in sharper detail. Fix motion problems with the prompt or a different model, never with the quality selector.

Which VdoBloom models even offer 4K video?

Seedance 2, Kling 3.0 Omni, Gemini Omni and LTX-2 Fast all expose a 4K tier. WAN 2.7 and Seedance 2 Fast top out at 1080p and 720p respectively. If the quality dropdown does not show 4K for the model you picked, that model cannot produce it.

Is 2K a real option or just marketing?

On video it is real but rare — LTX-2 Fast has a genuine 1440p tier that sits between 1080p and 4K at 57 credits for 10 seconds. On images, 2K is a standard rung on Nano Banana Pro, GPT Image 2 and Riverflow, and on Nano Banana Pro it costs exactly the same as 1K.

Why does the same tier cost different amounts on different models?

Because credits track what each provider charges per second of output, plus a fixed margin. Seedance 2 at 1080p genuinely costs more to run than Kling 3.0 Omni at 1080p, and the table reflects that instead of averaging it.

Do I need a paid plan to download a 4K file cleanly?

Yes. Free accounts always receive a watermarked download regardless of resolution; any paid tier, including a $2.49 one-time credit pack, downloads the original file with no watermark and commercial rights attached.

AI Video Resolution on VdoBloom: When 2K and 4K Are Worth the Extra Credits