Seedream 5.0 Pro vs Flux 3 Image — texture or natural light

Both are photoreal flagships, priced a few credits apart, and both usually land in about 20 seconds. Seedream 5.0 Pro, from ByteDance, is 36 credits / image. Flux 3 Image, from Black Forest Labs, is 32 credits / image. So the choice is not about budget. It is about where the realism of your picture lives. Seedream's lives in surfaces: dense detail, rich texture, big scenes that stay coherent. Flux 3's lives in light: natural, believable, not over-styled, and it renders in-image text reliably. A quick rule: if you would zoom in to admire it, Seedream. If you would notice the light first, Flux 3. If there is a sign to read, Flux 3.

The numbers

	Seedream 5.0 Pro	Flux 3 Image
Maker	ByteDance	Black Forest Labs
Price per image	36 credits / image	32 credits / image
At the entry pack	$0.36	$0.32
Typical render	about 20 seconds	about 20 seconds
Positioned for	detail, texture, dense scenes	natural light, photoreal, typography

The difference is 4 credits per image, or 400 credits across a hundred. On a single picture it is a rounding error; pick on the look.

Practicalities do not split them either. Each takes only a text prompt on eroq, renders 1:1, 3:4, 4:3, 9:16 or 16:9 at a flat price per image, batches up to four takes, and is open on any plan. Both providers moderate upstream, and a refusal is free.

Two kinds of photoreal

A photograph convinces in one of two ways, and most images lean hard on one of them.

Texture realism is the surface holding up at close range: stone grain, bark, rust blooming on a hinge, pilled wool, the wet sheen on a cobble. It is what a viewer checks when they zoom. That is Seedream's territory.

Light realism is the light behaving as light does: window falloff across a cheek, the flat calm of an overcast street, golden hour that warms one side of a face and leaves the other cool, shadows that agree with each other. It is what a viewer feels before they think. That is Flux 3's territory.

To choose, ask which one would give the fake away. A forest that looks like plastic fails on texture. A kitchen scene with three suns fails on light.

Scene by scene

Scene	Pick	Why
Mountain or forest landscape	Seedream	layered foliage and ridgelines
Building facade or old interior	Seedream	stone, glass, ornament
Workshop, market, cluttered desk	Seedream	many objects kept coherent
Morning kitchen, lifestyle moment	Flux 3	window light sells it
Candid portrait outdoors	Flux 3	natural skin tones, unstyled
Weathered character portrait	Seedream	skin and fabric texture
Food macro	Seedream	crumbs, glaze, grain
Food on a table by a window	Flux 3	the light is the appetite
Product with a printed label	Flux 3	typography
Night street with readable signs	Flux 3	text plus practical light

Prompt order matters

The two models reward different openings, so the same scene should be written twice.

For Seedream, lead with the surfaces. Subject and materials first, then the environment, weather and time of day, then lens and light. It rewards more detail, so keep adding materials until the scene is dense.

A Victorian greenhouse interior overgrown with ferns and climbing figs, flaking white paint on cast-iron ribs, cracked glass panes furred with moss, terracotta pots stacked on a slatted bench, soft overcast light, ultra-detailed, 35mm photograph.

For Flux 3, lead with the light. Light and setting first, then the subject, then camera and lens. Quote any words that must appear and keep them short.

Late afternoon sun slanting through the dusty glass of a Victorian greenhouse, warm beams catching floating pollen, a gardener in a canvas apron watering ferns, long soft shadows across the brick floor, 50mm lens, natural colour.

Same building, two pictures. The first is about what everything is made of. The second is about what time it is. For a longer list of light and lens vocabulary that works on both, see photoreal AI image prompts.

When neither is the answer

• The same person or product in every frame. Neither reads pictures on eroq. Use Eroq One (up to ten references, 20 credits / image) or Krea2 (up to four, 10 credits / image).
• Typography-led layouts. A poster built around a headline and a date line belongs on a text specialist; GPT Image 2.5 vs Flux 3 for text breaks that down.
• Fully private renders. Both run on outside providers, which may keep the prompt but not train on it. eroq's own engines, Krea2 and Eroq One among them, are run by eroq itself and fully private.
• A scene the provider refuses. The refusal costs nothing, and eroq's own photoreal engine, Eroq Uncensored, is uncensored within the acceptable-use policy and fully private, for 10 credits / image.

Each model also has a full guide: Seedream 5.0 Pro and Flux 3 Image. Then try the greenhouse pair yourself in the image studio.

Example prompts

Seedream, surfaces in layers. Lichen, leaves and wet rock each give it something to resolve.

An old stone bridge over a mountain river in autumn, lichen-covered arches, copper and gold leaves caught in the eddies, wet boulders in the current, light drizzle, a layered pine forest behind, wide landscape photograph, 24mm at f/11.

Flux 3, a lifestyle moment. The sunbeam carries the realism; nothing is posed.

Early morning window light falling across a small apartment kitchen, a man in a grey t-shirt pouring coffee from a moka pot, steam curling through the sunbeam, crumbs on a wooden board, 35mm candid lifestyle photograph.

Seedream, a texture-led portrait. Soot, leather and skin are the subject.

A close portrait of a blacksmith at his forge, soot in the creases of his forehead, a scorched leather apron, a scarred anvil in the foreground, dense detail, warm coal glow from below, 85mm photograph.

Flux 3, light plus a short line of text. Golden hour and a readable chalkboard in one frame.

A neighbourhood bookshop at golden hour, low sun through the front window, a chalkboard by the door reading "NEW ARRIVALS", a woman browsing the poetry shelf, warm dust in the air, 35mm photograph.

More Seedream-specific prompts for architecture, landscapes and macro are in Seedream 5.0 Pro prompts.

FAQ

Which is more photorealistic, Seedream 5.0 Pro or Flux 3 Image?

Both are photoreal; they convince in different ways. Seedream's strength on eroq is texture and dense detail, Flux 3's is natural light. Pick by what would give a fake away in your scene.

Is Seedream 5.0 Pro more expensive than Flux 3 Image?

Slightly: 36 credits / image against 32 credits / image, a gap you only notice across hundreds of images.

Which is better for portraits?

Flux 3 for candid portraits in natural light, Seedream for texture-led ones with weathered skin and heavy fabric. For the same face across a series, use Eroq One with reference pictures.

Which one can put text in the image?

Flux 3 Image. It is positioned for reliable in-image text; Seedream is positioned for detail and texture, so keep lettering off its brief.