Seedance vs Nano Banana for Ads: When One Clip Is Worth 15 Stills

Fifteen stills or one short clip

A skincare brand has ten angles for a new vitamin C serum and one week to learn which one people stop for. It can render all ten as short vertical videos. Or it can render ten stills, see which two pull clicks, and animate only those. The second plan costs about a quarter.

That is the real question behind "Seedance vs Nano Banana." Seedance is ByteDance's family of video models, and Nano Banana Pro is Google's image model, sold in the Gemini API as Gemini 3 Pro Image. They do not compete for the same output. On the vendors' own price lists, one 5-second Seedance 2.5 clip at 720p costs about as much as 17 Nano Banana Pro images, and Seedance's image-to-video endpoint on fal uses an image as its first frame. The still you test can become the clip you run.

Both models are in Novoads: Nano Banana Pro in the image composer, and Seedance 2.5, Seedance 2.0 and Seedance 2.0 Mini in the video picker, all on one credit balance. So this is less a verdict than a routing rule. Below: what each model is, what a still and a clip cost, when a still is enough, when motion pays for itself, and how to make a still that works as a clip's opening frame.

The quick answer: stills test, clips persuade

Nano Banana Pro and Seedance do different jobs, and a good pipeline usually runs them in that order. The image model finds the angle. The video model scales the one that won.

Use Nano Banana Pro when

• The message is a headline, a price or an offer that has to read correctly
• You are still hunting for the angle and need many cheap variants
• The placement only ever shows one frame
• You need the opening frame of a clip you have not made yet

Use Seedance when

• The product proves itself in use: a pour, a texture, an application
• The ad has to talk, with a voice or dialogue synced to the picture
• The story moves from a before to an after
• A still has already won and you want it to move

Here are the two side by side. The API prices are Google's and fal's published rates as of September 2026.

	Nano Banana Pro	Seedance 2.5 image-to-video
Maker	Google	ByteDance
Output	One image	Video with sound
Size or length	1K, 2K or 4K	4 to 30 seconds
API list price	$0.134 per 1K/2K image	About $0.47 per 720p second
In Novoads	0.5 credits at 2K	7.6 credits, 5 s at 720p

Two models, two jobs, and which Nano Banana you mean

The names get used loosely, so pin down what each one is before comparing prices.

Seedance: ByteDance's video model, animating your still

Seedance is the video family built by ByteDance's Seed team, and fal serves the 2.5 generation through three endpoints: text-to-video, image-to-video and reference-to-video. The image-to-video endpoint is where the chain lives. fal's page puts it plainly: "Image to video uses your image as the first frame and generates motion, camera work, and synchronized audio from it."

You choose 480p or 720p, and a duration from 4 to 30 seconds or "auto." You can also add an end frame to control where the clip lands. The part that matters for ads is what the model keeps: fal says it "preserves the look, palette, and style of your input while adding natural motion." In this mode your still is not a loose suggestion. It is frame one. Our explainer on what Seedance 2.5 changes for ad makers covers the 30-second single take in more depth.

Nano Banana Pro: Google's image model for type and consistency

Google introduced Nano Banana Pro on November 20, 2025, and called it "the best model for creating images with correctly rendered and legible text directly in the image." Its developer docs now describe it as "the premium choice for the most complex visual tasks."

Two capabilities make it useful upstream of a video model:

• Type inside the picture. A headline or a price badge renders as part of the image rather than as an overlay added later.
• Consistency across a set. Google says it can use up to 14 images while keeping the resemblance of up to 5 people, which is how ten stills keep one product and one face.

Google's deprecations page, updated September 17, 2026, lists the stable gemini-3-pro-image model with no shutdown date announced.

Four Nano Bananas, and one retiring on October 2

"Nano Banana" is not one model. Google's docs say the name "refers to four distinct models available in the Gemini API": Nano Banana 2 Lite, Nano Banana 2, Nano Banana Pro and the original Nano Banana, Gemini 2.5 Flash Image. The original is on its way out. Google's pricing page says gemini-2.5-flash-image is deprecated "and will be shut down on October 2, 2026."

So when a tutorial says "Nano Banana," check which one it means. In this post it means Nano Banana Pro, because that is the model Novoads runs. Nano Banana 2 is cheaper on Google's API, at $0.101 per 2K image, and our roundup of Nano Banana alternatives for ad images sorts the rest of the field by the job each model does.

What a still and a clip cost, per output

Both vendors bill in tokens and translate the tokens into something readable. The translations are what you budget with.

The still: a flat price per image

As of Google's pricing page update on September 16, 2026, a standard Nano Banana Pro image at 1K or 2K is "Equivalent to $0.134 per 1K/2K image," and a 4K image works out to $0.24. Three details matter for ad work:

• 2K costs nothing extra. Google says 1K and 2K output images both consume 1,120 tokens, so they are the same price.
• Batch halves it. Google's Batch tier lists the same 1K or 2K image at $0.067, a lane our Higgsfield vs Nano Banana comparison weighs against Higgsfield's plan windows.
• Every image is billed. The Free Tier column for this model reads "Not available."

The clip: a price per frame area and second

fal bills Seedance 2.5 image-to-video by output tokens. The formula is frame height times width times seconds times 24, divided by 1,024, at $0.0214 per 1,000 tokens for 480p and 720p. In per-second terms fal lists about $0.47 for 720p with audio and about $0.22 for 480p. Its own worked example puts a 5-second 1280×720 clip at about $2.31 and a 30-second one at about $13.87, and our Runway vs Seedance comparison sets fal's rate beside Runway's.

Two details change how you budget:

• The still is not on the bill. fal says "Input images are not billed," so the frame you hand the model costs nothing on the video side, and fal's API docs say the price is the same whether or not audio is generated.
• The formula decides, not the table. fal calls its per-second rates "approximations for the common 16:9 case." Run the formula for a vertical ad: at 720p, 9:16 renders at 720×1280, the same frame area as 1280×720, so a 5-second vertical clip comes to the same 108,000 tokens.

The ratio that sets the budget

Put the two list prices side by side, and one 5-second 720p clip costs about as much as 17 Nano Banana Pro images. A 30-second clip, at about $13.87, costs more than 100 stills.

Inside Novoads the ratio lands close by: 7.6 credits for a 5-second Seedance 2.5 clip at 720p against 0.5 credits for a Nano Banana Pro image at 2K, or about 15 stills per clip. Our guide to what an AI video credit buys shows how to compare units like these across vendors.

Whichever price list you use, motion costs an order of magnitude more than a still. That is the case for treating video as a promotion a creative earns, not the format every idea starts in.

When a still is enough

Three situations make the still the correct format rather than the budget one.

The message is words and a number

If the ad's job is a price, a deadline or a claim in type, the still is not a compromise. Nano Banana Pro is built for that job, and ByteDance concedes the weak spot for its own video model: its Seedance 2.0 launch post, dated February 12, 2026, says "there is still room for optimization regarding multi-subject consistency, text rendering accuracy, and complex editing effects." Our guide to Nano Banana Pro for ad creative goes deeper on headlines and price badges.

A practical rule follows. When a clip does need words on screen, add them as an overlay in the edit instead of asking the video model to draw them or keep them legible.

You are still looking for the angle

Early in a test, the expensive question is which promise people stop for, not how to show it. At list prices, ten Nano Banana Pro stills at 2K cost $1.34, and ten 5-second Seedance 2.5 clips at 720p cost $23.10.

A still will not tell you everything a video would. It will tell you which angle deserves the motion budget, which is the question worth answering first. The mechanics of reading that result without fooling yourself are in our guide to ad creative testing.

The placement only shows one frame

Some slots never play anything: a marketplace product tile, a static display banner, a cover image. Paying for five seconds of motion to fill a slot that shows a single frame buys nothing. Make the still, at the size and shape the slot uses, and spend the difference on more angles.

When motion earns its cost

The same logic runs the other way. These are the cases where a still is the wrong ad, whatever it saves.

The product proves itself in use

Some products only make their case while something happens: a serum spreading on skin, a sneaker sole flexing, a sauce pouring. That is what the video model is for, and you can direct it. fal's tips say "Slow dolly-in", "handheld pan left" and "static wide" all land reliably, so the reveal of the product is a camera instruction rather than a lucky draw.

The ad has to talk

A still cannot deliver a line. fal says Seedance generates ambient sound, impacts and dialogue with the visuals in one pass, and fal's schema says to "Put spoken dialogue in double quotes for lip-synced audio." If the angle depends on a person saying something, a hook question or a quick testimonial, the clip is not an upgrade of the still. It is a different ad.

The story has a before and an after

A before-and-after is a transition, and transitions are what the end frame is for. fal names "loops, product reveals, and before-and-after transitions" among the uses of start and end frame control.

Here the two models chain twice:

1. Nano Banana Pro makes the before still.
2. Nano Banana Pro makes the after still, with the same product and the same person as references.
3. Seedance moves from the first frame to the last.

At Google's list price that is $0.268 in stills, plus the clip.

How to turn a still into a clip's opening frame

If motion is the right call, the still stops being the ad and becomes the input. That changes what a good still looks like.

What the clip inherits from the still

In image-to-video, everything the still gets right carries forward, and so does everything it gets wrong. The label, the lighting, the creator's face and the background are all fixed at frame one. fal goes further for 2.5 and says "your input character or product holds its appearance across the whole clip."

Treat that as a vendor claim to check, and as a reason to fix problems in the still, where a re-roll costs 13.4 cents, rather than in the clip, where it costs dollars.

Make the frame for the video, not the feed

Three settings on the still decide how well it animates:

• Resolution. fal's Seedance 2.5 schema lists 480p and 720p. A 2K Nano Banana Pro still already exceeds that and costs the same as 1K, so paying $0.24 for 4K buys little for a first frame.
• Shape. Generate the still in the clip's aspect ratio. fal says that with the ratio on auto "the model chooses the best fit from your input image," and advises setting it explicitly when you need predictable billing.
• Cleanliness. Export the original file. fal warns that "Compression artifacts and heavy watermarks in the start frame carry into the motion," so a screenshot of a still makes a worse first frame than the still itself.

Write the prompt for what changes

The still already describes the subject, so the prompt should not describe it again. fal's advice is to "Describe what changes, not what is already visible," because "The image establishes the subject; spend the prompt on motion, camera, and sound."

Test short before you go long. fal says a 5-second test "costs roughly a sixth of a 30 second one," so settle the motion at five seconds and only then extend. Our Seedance 2.5 prompt guide for UGC ads has worked prompts for the longer take.

One product, many opening frames

A variant set of clips is only a set if the frames match. Google's docs say Gemini 3 image models can mix up to 14 reference images, and each reference image you send Nano Banana Pro is billed as input at $0.0011. Feed the same product photos and the same creator into every still, and every clip in the set starts from a consistent frame.

A worked example: ten angles, one week

Take the serum brand from the top: ten angles, vertical 9:16, and clips of 5 seconds at 720p. Dollar figures use Google's and fal's September 2026 list prices; credit figures are Novoads credits.

Plan A: every angle as a clip

Plan A renders all ten angles straight to 5-second Seedance 2.5 clips:

• At list prices: 10 × $2.31 = $23.10
• In Novoads: 10 × 7.6 credits = 76 credits, more than the 50 credits the Starter plan grants in a month

Plan B: stills first, motion for the two winners

Plan B makes ten Nano Banana Pro stills at 2K, runs them, and animates the two that win, each from its own winning still:

• Ten stills: 10 × $0.134 = $1.34, or 10 × 0.5 = 5 credits
• Two clips: 2 × $2.31 = $4.62, or 2 × 7.6 = 15.2 credits
• Total: $5.96, or 20.2 credits

What the difference buys

Plan B spends about a quarter of Plan A. On 50 credits it runs twice in a month, twenty angles and four clips for 40.4 credits, where Plan A does not fit even once.

The caveat is real: a still that wins is not guaranteed to win as a clip, because motion and sound change the ad. But Plan B spends its motion budget on angles that already earned attention. Plan A spends most of it on the eight that, in this example, did not.

How Novoads solves the still-or-clip decision

Novoads runs Nano Banana Pro and three Seedance models on one credit balance, so a stills-first test and the clips that follow it happen in one workspace instead of two vendor accounts.

Both models, one balance

Here is what each step costs inside Novoads:

• Nano Banana Pro is the default image model, set to 9:16 at 2K, at 0.5 credits per image at 1K or 2K and 1 credit at 4K
• Seedance 2.5 renders 4 to 30 seconds at 480p or 720p, at 7.6 credits for 5 seconds at 720p and 3.8 credits at 480p
• Seedance 2.0 and Seedance 2.0 Mini cost 3 credits and 1.5 credits for a 5-second clip, for drafts that do not need the longer take

Novoads starts at $49/month (Starter, 50 credits per month). All plans are published on /pricing. Fifty credits cover 100 Nano Banana Pro stills at 2K, or six 5-second Seedance 2.5 clips at 720p, or the stills-first plan above twice.

From the still to the clip, with the product in hand

In the Novoads video composer, Seedance takes your still as a reference image that you name in the prompt as @Image1, and the prompt then describes what should change. Our note on reference-to-video upload rules covers how many images a request takes and how the tags work.

When the product has to sit in someone's hand, Discover's product templates run the chain for you. An image edit puts your uploaded product into the template creator's hand, then a 15-second Seedance 2.0 clip animates it. For the rest of the handoff from product photo to finished video, see our guide to making product videos with AI.

Stills find the angle. Motion earns the spend.

"Seedance vs Nano Banana" sounds like a contest, and it works more like a relay. The image model is cheap enough to be wrong ten times, and good enough at type and consistency to make the frame a clip starts from. The video model costs enough that every second should go to an angle that has already proved itself, and it is good enough at motion and sound to make that angle land.

So do not ask which model is better. Ask which question you are answering. A still answers what the ad should say. A clip answers how it should move. Answer the cheap question first.