The default model in Seedream Studio

Seedream 5.5: 4K images, edits and transparent backgrounds

ByteDance's newest Seedream model, online in Seedream Studio. Generate from a prompt or edit with up to 10 reference images, in eight aspect ratios and up to 4K. Turn on the Transparent background switch for a transparent PNG.

Try Seedream 5.5 free

75 free credits at sign-up · no credit card

Inside a sunlit Victorian glasshouse, a grey-haired woman in a linen shirt and apron sprays a fine mist over a bench of white orchids in terracotta pots.

Seedream 5.516:93840 × 21604KHigh

See the exact prompt

Exact prompt

A cinematic wide shot inside a sunlit Victorian glasshouse in the early morning. A grey-haired woman botanist in her sixties, wearing a linen apron and rolled shirtsleeves, mists a row of white orchids with a brass plant mister. Shafts of low golden sunlight cut through the humid air and catch drifting water droplets. Fine detail everywhere: condensation beads on the old glass panes, rivets and peeling white paint on the curved wrought-iron frame, fern fronds, moss on terracotta pots, and a wet stone floor reflecting the light. Photorealistic, natural colour grading, 35mm lens at f/4, deep focus, 4K.

Seedream 5.5 sizes and credits

Seedream 5.5 comes in two tiers across eight aspect ratios: Standard, at 2K, and High, at 3K to 4K. Each tier has one size per ratio, so you choose from these 16 sizes; Seedream 5.5 takes no custom sizes.

Seedream 5.5 sizes in pixels, width × height, with the credits each tier costs
Aspect ratioStandard75 creditsHigh100 credits
16:92816 × 15843840 × 21604K
1:12048 × 20482880 × 2880
9:161584 × 28162160 × 38404K
4:32368 × 17763264 × 2448
3:41776 × 23682448 × 3264
3:22496 × 16643504 × 2336
2:31664 × 24962336 × 3504
21:93136 × 13444368 × 1872
Modes
Text-to-image and edit
Reference images
Up to 10 per edit
4K
3840 × 2160 and 2160 × 3840, at High
Transparent background
With the Transparent background switch, delivered as PNG. Opaque results come as JPEG.

Seedream 5.5 vs Seedream 5 Pro

Seedream 5.5 is the default model in Seedream Studio. Seedream 5 Pro, ByteDance's Seedream 5.0 Pro, stays available with Flash Fast and custom sizes. Here is how the two compare in Studio today.

Seedream 5.5 and Seedream 5 Pro in Seedream Studio, side by side
In Seedream StudioSeedream 5.5Seedream 5 Pro
ModesText-to-image and editText-to-image and edit
Aspect ratios8 presets3 presets, plus custom sizes
Standard size, 16:92816 × 15842048 × 1152
High size, 16:93840 × 21604K2720 × 1530
Largest square2880 × 28802048 × 2048
Transparent backgroundYes, with the Transparent background switchNo
Flash FastNoYes
Reference images per editUp to 10Up to 10
Credits per image75 Standard · 100 High75 Standard · 100 High

Seedream 5 Pro stays available

Pick Seedream 5 Pro in the model picker when you need Flash Fast or a custom size. Its own page shows Pro's results, with their prompts.

About Seedream 5 Pro

Made with Seedream 5.5

Four more Seedream 5.5 images, each with the exact prompt that made it. We checked every image before putting it here. The note under each one says what it shows, which can differ from what the prompt asked for.

English and Chinese text on a poster

Seedream 5.52:31664 × 2496Standard

A vintage-style poster for Lantern Tea House: a glowing red paper lantern above a steaming teapot and two cups, under an indigo night sky.
A vintage screen-print style poster. At the top, the headline "LANTERN TEA HOUSE" and the Chinese title "灯笼茶馆" in saffron brush calligraphy. A glowing red paper lantern with a tassel hangs above a steaming clay teapot and two cups on a wooden table, under an indigo night sky with one crescent moon and stars, with misty mountains, a hilltop pavilion, a pine branch, blossoms and a stone lantern. At the bottom, "Open nightly from 8 PM to 2 AM" and "每晚八点至凌晨两点营业".

Exact prompt

A vintage screen-print travel poster for a fictional tea house, portrait format. At the top, a large bold serif headline in English reading exactly "LANTERN TEA HOUSE". Directly beneath it, a Chinese title in brush calligraphy reading exactly "灯笼茶馆". In the centre, a flat illustration of a glowing red paper lantern with no writing on it, hanging above a steaming clay teapot and two small cups, under a deep indigo night sky with a single crescent moon and a few stars, with saffron and cream accents and a subtle paper grain. At the bottom, two lines of small, clean sans-serif text: the first reading exactly "Open nightly from 8 PM to 2 AM" and the second reading exactly "每晚八点至凌晨两点营业". These four lines are the only text on the poster, with no signs, labels or characters anywhere else. All lettering crisp, correctly spelled and fully legible, generous margins.

A backlit portrait

Seedream 5.53:41776 × 2368Standard

A freckled woman with auburn hair, in a cream linen shirt, backlit by the low sun in a meadow of dry grass.
A golden-hour portrait of a woman of about thirty with freckles and auburn hair loosely pinned up (stray strands, a small flower clip), in a cream linen shirt, standing in a meadow of dry grass. The low sun behind her rims her hair, cheek and jaw with light; she looks into the camera; warm haze and a softly blurred background.

Exact prompt

A backlit portrait of a woman in her early thirties standing in a meadow of tall grass at golden hour. The low sun behind her creates a bright rim light that outlines her loose auburn hair, her shoulders and the edge of her cream linen shirt. Her face is softly lit by warm bounce light, with natural skin texture and light freckles, a calm expression, looking just past the camera. Warm haze, a gentle lens flare, creamy background bokeh. An original, non-famous person. Photorealistic, 85mm lens at f/1.8, shallow depth of field.

Glass, ceramic and copper in a product shot

Seedream 5.54:32368 × 1776Standard

A pour-over coffee set on a walnut tray: a speckled stoneware dripper on a glass carafe of coffee, beside a copper gooseneck kettle.
A pour-over coffee set on a dark walnut tray on a pale oak table: a speckled tan stoneware dripper with internal ribs sits on a clear glass carafe of dark amber coffee (condensation inside the glass), beside a brushed-copper gooseneck kettle with a domed lid. Soft window light through a sheer curtain. No logos or text.

Exact prompt

A studio product photograph of a pour-over coffee set on a pale oak tabletop: a matte speckled stoneware dripper with visible glaze pinholes, a clear borosilicate glass carafe half full of amber coffee, a gooseneck kettle in brushed copper with fine circular grain and a soft reflection of the window, and a small walnut tray with crisp wood grain. Soft diffused window light from the left, gentle shadows, a light linen backdrop. Faithful material rendering: the ceramic, glass, metal and wood each look exactly like themselves. No logos, no text, no brand marks. Photorealistic, 100mm macro lens at f/8.

An ultra-wide 21:9 landscape

Seedream 5.521:94368 × 1872High

A glacial valley at sunrise, with snow-covered peaks lit pink and gold above a turquoise river and a small wooden cabin.
An ultra-wide view down a glacial valley at sunrise: jagged snow-covered peaks lit pink and gold, low cloud along the ridges, a turquoise river with gravel bars winding through golden tussock and dark boulders, a small wooden cabin with chimney smoke, and frost on the grass in the foreground.

Exact prompt

An ultra-wide 21:9 landscape panorama of a glacier-carved mountain valley at sunrise. Jagged granite peaks dusted with fresh snow catch pink and gold first light, and low clouds cling to the ridgelines. A turquoise braided river winds across a wide valley floor of golden grass and dark boulders, and a single small wooden cabin with a thin line of chimney smoke gives a sense of scale. Crisp detail from the frosted grasses in the foreground to the distant summits. Landscape photography, natural colours, deep focus.

Three edits in a row

We made a café scene with Seedream 5.5, then edited it three times. Each round started from the result of the round before and asked for one change. Drag the slider to compare the first image with the result of round three.

From the first image to round three

Each instruction asked for one change and listed everything to keep.

After three rounds: the same terrace with a glass of iced coffee on the table, a red-and-white striped awning and a small brown dachshund asleep under the table.The first image: a sunny café terrace with a cappuccino and a croissant on a round marble bistro table, under a green-and-white striped awning.
First image
Round 3
drag_handle

Between the two, the cappuccino has become an iced coffee, the awning has turned red and white, and a dachshund sleeps under the table. The table, chairs, windows and geraniums stay as they were.

The first image already missed one instruction: its prompt asked for no people and no signs, but far down the street, out of focus, it shows a few passers-by and an unreadable shop sign.

Exact prompt for the first image

A sunny street café scene seen from the pavement at table height: a small round white marble bistro table holding a white ceramic cup of cappuccino with heart latte art on a saucer and a golden croissant on a small plate, with two black wrought-iron bistro chairs. Behind the table, the café front has a plain green-and-white striped awning with no lettering, tall glass windows and terracotta pots of red geraniums. A cobblestone street, warm morning sunlight, soft shadows, no people, and no text or signs anywhere. Photorealistic, 35mm lens.

The three rounds

  1. The café table with a tall glass of iced coffee and a paper straw where the cappuccino was.

    Round 1

    Swap the cappuccino for an iced coffee

    The same café scene with the cappuccino and saucer replaced by a tall clear glass of iced coffee with ice cubes and a paper straw, in the same spot. Everything else is unchanged.

    Exact edit instruction

    Replace the cappuccino cup and saucer on the table with a tall clear glass of iced coffee with ice cubes, a paper straw and droplets of condensation, standing in the same spot. Keep everything else exactly as it is: the marble table, the croissant and its plate, both chairs, the green-and-white striped awning, the windows, the geraniums, the cobblestones, the lighting and the camera angle.
  2. The same café terrace, its awning stripes now red and white.

    Round 2

    Turn the awning red and white

    The same scene with the awning stripes changed from green-and-white to red-and-white, including the awning's reflection in the window glass at top left. Everything else is unchanged.

    Exact edit instruction

    Change only the colour of the awning stripes from green-and-white to red-and-white. Keep everything else exactly as it is: the glass of iced coffee, the croissant and its plate, the marble table, both chairs, the windows, the geraniums, the cobblestones, the lighting and the camera angle.
  3. The same café terrace with a small brown dachshund curled up asleep on the cobblestones under the table.

    Round 3

    Add a sleeping dachshund

    The same scene with a small brown dachshund curled up asleep on the cobblestones under the table, in its shadow, between the table base and the left chair's legs. Everything else is unchanged.

    Exact edit instruction

    Add a small brown dachshund lying curled up asleep on the cobblestones under the table, in the table's shadow. Keep everything else exactly as it is: the glass of iced coffee, the croissant and its plate, the marble table, both chairs, the red-and-white striped awning, the windows, the geraniums, the lighting and the camera angle.

Transparent backgrounds, as PNG

Turn on the Transparent background switch to ask Seedream 5.5 for a transparent background. Transparent results come back as PNG files. Both images below were made with the switch on, and the checkerboard shows through wherever they are transparent.

A die-cut sticker

Seedream 5.51:12048 × 2048Standard

A sticker of a sleeping ginger cat curled up in a blue ramen bowl, with chopsticks and wisps of steam.
A die-cut sticker on a transparent background: a sleeping ginger tabby cat curled in a blue ramen bowl with a wave pattern, among noodles, half a boiled egg, sliced pork and green onion, with two wooden chopsticks leaning in the bowl and wisps of steam above. A white outline surrounds the design. No text.

Exact prompt

A die-cut sticker of a cheerful ginger cat curled up asleep inside a ramen bowl, with a pair of chopsticks resting on the rim and a few wisps of steam. A bold white outline around the whole design, flat vector colours with soft cel shading. A single standalone sticker asset on a fully transparent background, with no shadow on the background and no text.

A set of nine icons

Seedream 5.51:12048 × 2048Standard

Nine glossy pastel weather icons in a three-by-three grid, from a sun and a rain cloud to an umbrella and a rainbow.
Nine glossy pastel weather icons in a 3×3 grid on a transparent background: a sun, a rain cloud with three drops, a snowflake, a lightning bolt over a small cloud, a crescent moon with two stars, a thermometer with tick marks, an open umbrella in pastel rainbow colours, wind swirls, and a rainbow resting on two clouds. No text.

Exact prompt

A set of nine weather icons arranged in a neat 3 by 3 grid: a sun, a cloud with rain, a snowflake, a lightning bolt, a crescent moon with two stars, a thermometer, an open umbrella, a wind swirl and a rainbow. A consistent rounded style with glossy, soft-gradient fills in warm and cool pastel tones, equal sizes and even spacing. Each icon is a standalone design asset on a fully transparent background, with no tiles or frames behind them and no text or letters.

Seedream 5.5 FAQ

Seedream 5.5 is ByteDance's newest Seedream image model and the default model in Seedream Studio. It makes images from a text prompt and edits images you give it, with up to 10 references, in eight aspect ratios and up to 4K.

Yes. Seedream 5.5 runs in your browser in Seedream Studio, and new accounts get 75 free credits with no credit card. A Standard image costs 75 credits and a High image costs 100 credits.

Yes, at the High tier: 3840 × 2160 for 16:9 and 2160 × 3840 for 9:16. High sizes in the other aspect ratios have about the same number of pixels, so the largest square is 2880 × 2880.

Choose Seedream 5.5 and turn on the Transparent background switch before you generate. It works for text-to-image, edits and batch runs, at no extra cost. Transparent results come back as PNG files, and opaque results as JPEG.

Yes. Use a result as the reference for your next edit, as in the three rounds above. ByteDance says Seedream 5.5 keeps its quality through more than 80 rounds of edits; this page shows three.

Up to 10 in one edit. The result takes the aspect ratio and size you choose, not the shape of your reference images.

Not on Seedream 5.5: it offers 16 preset sizes, eight Standard and eight High. Seedream 5 Pro takes custom sizes.

Yes. Seedream 5 Pro, with Flash Fast and custom sizes, and Seedream 5 Lite stay in the model picker. Seedream 5.5 is the default for new sessions.

Try Seedream 5.5

Start with 75 free credits, no credit card needed. Pick a size, write a prompt or add a reference image, and see what Seedream 5.5 makes.

Start creating

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