Nano Banana 2.1 vs Seedream 5 Pro: scene fidelity or text control?
The results split by task: choose Seedream 5 Pro for closer multilingual text layout and advertising composition, with modest advantages in hand contact and matching typography during text replacement. Choose Nano Banana 2.1 for narrowly stronger scene and object placement preservation in reference edits and more convincing directional relighting. Product materials, counting, structured UI graphics, wardrobe transfer, outpainting, and product preservation across scene changes finish tied.
Side-by-side facts
| Feature | Nano Banana 2.1 | Seedream 5 Pro |
|---|---|---|
| Developer | ByteDance | |
| Availability on Banana Pie | Available now | Available now |
| Credits from | 25 credits | 25 credits |
| Max resolution | 4K | 2K |
| Reference images | Up to 8 | Up to 8 |
Scenario by scenario
Same prompt. Two models. Judge the difference in the published images below.
Product material and lighting
Depends on the taskTie. Both satisfy the scene and material requirements convincingly. Left has a small advantage in the halfway fill and readability of the upper-left lighting, but the overall difference is marginal.
- Exactly one transparent rectangular perfume bottle: Even. Each image shows a single upright rectangular glass bottle on wet black stone, with no visible text, logo, plants, or separate props.
- Halfway filled with amber liquid: Left is slightly closer. Its amber liquid occupies roughly half the interior, while the right bottle's liquid sits somewhat above the interior midpoint. Both have a clearly visible liquid surface and transparent empty space above it.
- Physically coherent glass refraction and reflection: Even. Both show believable thick glass edges, distortion through the bottle, and one reflection aligned beneath the base. Left's reflection is clearer in a smooth puddle; right's is more broken up by the stone's wet texture. Both treatments fit their visible surfaces.
- Upper-left lighting and contact shadow: Left is slightly clearer in its lighting direction, with strong highlights on the cap's top and left edges and illuminated upper-left glass surfaces. Right also has bright top and left highlights, though the lighting reads more centrally. Both bottles have a plausible dark contact area directly beneath the base.
Prompt & settings used
Prompt
A premium product photograph of exactly one transparent rectangular perfume bottle, half filled with amber liquid, standing upright on wet black stone. Light comes from the upper left, creating coherent refraction, a contact shadow, and one subtle reflection. No text, logo, plants, or extra objects.
Multilingual typography
Better here: Seedream 5 ProRIGHT wins because it preserves the required four-line layout and exact line order. LEFT has correct wording and colors but wraps the heading, creating a fifth line.
- Exactly four centered text lines and no additional text: RIGHT does better. It has exactly four centered lines. LEFT splits the heading into two lines, producing five centered lines. Neither adds extra wording.
- Exact wording and order: RIGHT renders "MOONLIGHT MARKET", "月光市集", "18 OCT", and "RIVER HALL" as the required four lines in order. LEFT renders "MOONLIGHT", "MARKET", "月光市集", "18 OCT", and "RIVER HALL" on separate lines; the wording is correct, but the required first line is broken.
- Text colors: Both satisfy this criterion. Each renders "月光市集" in red and all the English wording and date in black.
- Legibility, spacing, and alignment: Both are legible, with clear characters and centered alignment. Both use larger gaps around the Chinese line and a smaller gap between the date and venue, so neither has completely uniform vertical spacing. They are even on this criterion.
Prompt & settings used
Prompt
Design a clean cream-colored vertical event poster. Show exactly four centered text lines and no other text: "MOONLIGHT MARKET", "月光市集", "18 OCT", and "RIVER HALL". Render "月光市集" in red and all other lines in black.
Human anatomy and contact
Better here: Seedream 5 ProRIGHT has a modest advantage in finger formation and believable shaping contact. Both fall short of showing five fully distinct fingers on each hand.
- Exactly two fully visible hands are present, with no extra hands or people: Both show two hands belonging to one potter, with no extra people or hands. Neither fully exposes every digit: LEFT overlaps fingers along the bowl’s outer wall, while RIGHT hides part of the inner hand behind the rim.
- Each hand has exactly five distinct, naturally formed fingers: RIGHT is slightly closer. Its outer hand presents a thumb and four discernible fingers, although the inner hand’s digits are not all distinctly exposed. LEFT shows four fingers across the bowl interior with the thumb concealed, and the fingers of its supporting hand overlap heavily.
- The fingers, joints, and contact with the clay are anatomically plausible: RIGHT does better. Its fingers curve naturally against the inside and outside of the bowl, with believable knuckles and opposing pressure. LEFT’s exterior supporting fingers look compressed and less clearly separated, and its extended thumb is visibly lifted away from the clay.
- The clay bowl, spinning wheel, and shaping action are clearly recognizable: Both satisfy this criterion. Each shows a centered clay bowl, circular motion streaks on the wheel, and hands supporting the exterior while shaping the interior.
Prompt & settings used
Prompt
A photorealistic close-up of an adult potter shaping a clay bowl on a spinning wheel. Both hands are fully visible, each with five natural fingers touching the clay. No other people or hands. Soft window light.
Counting and attribute binding
Depends on the taskTie. Both satisfy the requested counts, arrangement, attributes, and handle direction. Left’s slightly clearer wood grain and more matte table do not create a substantial overall advantage.
- Object counts and placement: Both are even. Each shows exactly three red cubes in a row on the left, exactly two blue spheres on the right, and one yellow mug centered behind the groups.
- Colors, shapes, and materials: Both correctly bind red to wooden cubes, blue to glass spheres, and yellow to a glazed ceramic mug. Left has more conspicuous wood grain and a more matte-looking gray tabletop; right also clearly conveys the requested object materials. The difference is slight.
- Mug handle direction: Both are even. Each mug has a clearly visible handle extending to the right.
- No additional objects or text: Both are even. Neither image contains extra scene objects or visible text.
Prompt & settings used
Prompt
On a matte gray table, exactly three red wooden cubes form a row on the left, exactly two blue glass spheres sit on the right, and one yellow ceramic mug stands centered behind them. The mug handle points right. No other objects or text.
Advertising composition
Better here: Seedream 5 ProRIGHT follows the composition and text restrictions more closely. LEFT adds unwanted shoe branding and places the headline too far below the reserved top area.
- Shoe and orange trail placement: RIGHT does better. Both show exactly one silver shoe in the lower-right. RIGHT’s orange sweep curves through the bottom-left, while LEFT’s glowing trail enters prominently from the bottom-right before bending left.
- Text accuracy and exclusivity: RIGHT wins. RIGHT renders only "RUN LIGHT" and "42 KM", both correctly spelled. LEFT renders "RUN LIGHT" and "42 KM" correctly but adds "AERO" on the shoe, violating the restriction on other text.
- Top clearance and headline position: RIGHT wins. Both leave the top 15 percent uncluttered, but RIGHT places its headline near the upper-left just below that empty area. LEFT leaves a much larger empty region and places its headline substantially farther down.
- Visibility and visual hierarchy: Both do well. Each shoe, headline, and round badge is fully visible, and each orange trail clearly guides the eye through the composition. LEFT uses a large white headline and dramatic lighting; RIGHT uses clean spacing and orange accents to distinguish the headline and badge from the silver shoe.
Prompt & settings used
Prompt
Create a vertical social ad for a fictional running shoe named AERO. Keep the top 15 percent empty. Directly below it, place the headline "RUN LIGHT" in the upper-left. Show exactly one silver shoe in the lower-right, an orange trail curving from the bottom-left, and a round badge reading "42 KM". No other shoes or text.
Structured UI graphic
Depends on the taskTie. Both graphics satisfy all four criteria with correct text and consistent alignment. Their differences are stylistic rather than meaningful differences in prompt adherence.
- Title and column labels: Both are even. LEFT and RIGHT each render the exact title "CHOOSE YOUR PLAN" above exactly three columns labeled "STARTER", "PRO", and "TEAM".
- Three aligned rows per column: Both are even. Every column in each image contains exactly "PROJECTS", "STORAGE", and "SUPPORT", in that order, with matching horizontal row alignment across the columns.
- One blue SELECT button per column: Both are even. Each column contains exactly one blue button labeled "SELECT". LEFT uses slightly rounded rectangles; RIGHT uses more rounded buttons.
- Even alignment and no additional content: Both satisfy the criterion. LEFT has equally sized outlined cards with centered content; RIGHT has evenly spaced content groups separated by thin vertical rules. Both align their headings, rows, and buttons consistently and contain no additional columns or text.
Prompt & settings used
Prompt
Create a clean horizontal pricing comparison graphic titled "CHOOSE YOUR PLAN". Use exactly three equal columns labeled "STARTER", "PRO", and "TEAM". Under each column, show exactly three aligned rows labeled "PROJECTS", "STORAGE", and "SUPPORT", followed by one blue button labeled "SELECT". White background, dark navy text, no additional columns or text.
Six-reference object binding and edit
Better here: Nano Banana 2.1LEFT wins narrowly because it preserves the base scene and object placements more closely. Both successfully bind the requested replacement objects and include the correct fruit counts.
- Mug and napkin replacement: LEFT is slightly closer. Both show the navy mug with a gold rim and right-facing handle from Reference 2, plus the green-and-white striped fabric from Reference 3. LEFT keeps the napkin within the original towel’s footprint more closely; RIGHT extends it farther toward the mug. Both change the mug’s silhouette and size relative to the base.
- Orange and notebook replacement: LEFT does better on placement. Both contain exactly one orange with a green leaf and a mustard hardcover notebook with the reference’s black elastic band, and neither retains any of the four original objects. LEFT keeps the notebook’s position and footprint closer to Reference 1; RIGHT moves its front edge substantially farther back.
- Two lemons to the right of the mug: The two are even. Both show exactly two lemons to the mug’s right, with a leaf on the left lemon and no leaf on the right, matching Reference 6’s distinguishing arrangement. Neither adds extra fruit or unrelated objects.
- Preservation of the base scene: LEFT does better. Its tabletop knots, grain, framing, and warm lighting track Reference 1 more closely, and the napkin and notebook retain more of the original layout. RIGHT changes the cloth’s depth, shifts the notebook backward, and introduces stronger dark shadows around the fruit.
Reference images
Prompt & settings used
Prompt
Use Reference 1 as the base tabletop scene. Replace the red mug with the exact dark navy-blue mug from Reference 2 in the same position and orientation. Replace the folded white towel with the exact green-and-white striped napkin from Reference 3 in the same folded area. Replace the green pear with exactly one orange from Reference 4 in the same position. Replace the blue notebook with the exact mustard-yellow hardcover notebook from Reference 5 in the same position. Add exactly the two lemons from Reference 6 to the right of the mug. Preserve the wooden table, camera, framing, wood grain, lighting, shadows, and all other spatial relationships from Reference 1. Do not copy the white product backgrounds from References 2–6, duplicate any asset, or add other objects.
In-image text replacement
Better here: Seedream 5 ProRIGHT has a narrow edge for typography closer to the original. Both successfully replace the text and retain the storefront scene.
- Exact replacement text: Both sides are even. LEFT and RIGHT each read exactly "NIGHT OWL", with no visible remnants of the reference’s "MORNING BEAN".
- No additional or malformed characters: Both sides are even. All letters are clean and recognizable, with no extra characters on either sign.
- Original font character, spacing, and perspective: RIGHT is slightly closer. Both preserve the cream uppercase sans-serif lettering and follow the sign’s perspective, but LEFT spreads the letters more widely. RIGHT’s tighter spacing better resembles the reference.
- Sign material, lighting, and surrounding scene: Both largely preserve the green wood sign, lamps, storefront, plants, bench, and cast shadows. LEFT looks slightly softer and RIGHT looks slightly crisper than the reference; neither has a decisive advantage in preserving the scene.
Reference images
Prompt & settings used
Prompt
Replace only the sign text with exactly "NIGHT OWL". Preserve the original font style, spacing, perspective, sign material, lighting, and everything else.
Multi-reference identity and garment transfer
Depends on the taskTie. LEFT better preserves the original hand placement and lower pocket details; RIGHT better preserves the jacket's button orientation. Both deliver a coherent wardrobe replacement with small fidelity differences.
- Identity, expression, pose, proportions, and framing: LEFT is slightly closer to Reference 1. Both retain the woman's facial identity, relaxed expression, swept dark hair, and centered portrait composition. LEFT more closely preserves the original low hand position and arm arrangement; RIGHT raises the hands and changes the elbow positioning slightly.
- Jacket fidelity: The two have competing strengths. Both reproduce the pale blue denim, cream textured collar, flap chest pockets, metal buttons, and red sleeve patch from Reference 2. RIGHT preserves the reference's button placement on the viewer-right front panel, while LEFT reverses the buttons and buttonholes. LEFT more clearly retains the lower welt pockets, which are not clearly delineated on RIGHT.
- Complete replacement and background preservation: Even. Both fully replace the black blazer with the denim jacket, retain the gray wall and bright window edge from Reference 1, and avoid introducing the ghost mannequin or white product background.
- Physical coherence: Even. Both show plausible hands, cuffs surrounding the wrists, fabric folds at the bent elbows, and hair overlapping the collar and shoulders. Their soft illumination from the viewer's left and the shadows beneath the collars fit the original scene.
Reference images
Prompt & settings used
Prompt
Use the portrait in Reference 1 for the person and the isolated jacket in Reference 2 for the garment. Dress the person from Reference 1 in the exact jacket shown in Reference 2. Preserve the person's identity, face, expression, skin, hair, hands, pose, body proportions, background, framing, and lighting from Reference 1. Preserve the jacket's material, color, collar, buttons, pockets, and sleeve patch from Reference 2. Do not copy the ghost mannequin or white product background.
Coherent scene relighting
Better here: Nano Banana 2.1Left wins narrowly because the directional sunlight carries more convincingly through the tabletop, rug, and cast shadows. Both deliver clear golden-hour relighting and preserve the room's arrangement.
- Warm golden-hour light clearly enters from the left window: Both sides satisfy this well. Each shows warm sunlight on the sofa and distinct window-shaped patches on the back wall, visibly connecting the illumination to the left window.
- Highlights and shadow directions respond coherently to the new light source: Left is slightly stronger. Its brightly lit tabletop and rug are accompanied by long table-leg shadows extending toward the right, alongside the plant shadow on the wall. Right has convincing wall and sofa illumination, but the softer shadows beneath its strongly illuminated tabletop make the directional lighting less consistent across the room.
- The result is more than a uniform yellow color filter: Both sides succeed. Each introduces localized sunlit patches, plant silhouettes, and contrasting shaded areas. Left makes the distinction especially visible through the broad sunlight patch and sharp shadows across the rug.
- No furniture or decor is moved, added, removed, or redesigned: The two are essentially even. Both retain the reference's sofa, wooden coffee table, pale rug, potted tree, and floor lamp in the same arrangement, with closely matching silhouettes and no conspicuous additions or removals.
Reference images
Prompt & settings used
Prompt
Change the lighting to warm golden-hour sunlight entering from the left window. Do not move, add, remove, or redesign any object. Update highlights and shadows coherently.
Cross-ratio outpainting
Depends on the taskTie. Both produce convincing landscape extensions and preserve the reference’s central composition. Left’s slightly closer color match is too small an advantage to establish a clear winner.
- 16:9 with natural new content on both sides: The two are even. Both present a wide landscape canvas with beach, ocean, and sky continuing naturally to the left and right, without letterboxing.
- Complete original image centered without cropping or stretching: The two are even. Both retain the centered cabin, the sky above it, and the foreground sand below it. The cabin’s proportions and its placement relative to the horizon closely match Reference 1, with no obvious cropping or stretching.
- Original cabin, shoreline, and internal composition unchanged: Left is slightly closer in color, retaining the reference’s softer blue sky and pale cabin, while Right looks more saturated and contrasty. Both preserve the roof shape, door hardware arrangement, cabin supports, rightward shadow, and horizontal shoreline, though the cabin’s weathering appears somewhat different from the reference.
- Extensions without visible seams, mirrored filler, or repeated objects: The two are even. Both maintain continuous horizons and surf bands, with varied sand and cloud textures across the added sides. Neither shows an obvious join, mirrored section, or duplicated cabin.
Reference images
Prompt & settings used
Prompt
Expand the canvas to a 16:9 landscape by naturally continuing the beach, ocean, and sky on both sides. Keep the complete original image centered without cropping, stretching, letterboxing, or modifying it.
Product preservation across scene change
Depends on the taskTie. LEFT establishes the basketball setting more clearly and integrates the dusk lighting well; RIGHT is slightly closer to the reference sneaker’s proportions and details. Both preserve the distinctive side mark and provide plausible wet-surface contact.
- Wet outdoor basketball court at dusk: LEFT does better. Visible basketball hoops, painted court areas, wet pavement, and a fading sunset make the setting explicit. RIGHT convincingly shows a wet fenced court at dusk, but its background lacks a visible basketball hoop.
- Silhouette, sole geometry, stitching, materials, and camera angle: RIGHT is slightly closer to Reference 1. It retains the broad side panel, smooth white upper, seam paths, and textured toe bumper particularly well. LEFT preserves the same construction but makes the shoe appear somewhat more compact, with a shorter-looking toe. Both keep the reference’s heel-left, toe-right viewing angle.
- Black geometric side mark: The two are essentially even. Both preserve the reference’s angular three-branch shape, short leftward terminal, rising upper branch, and long descending right branch. The mark remains solid black and clearly readable in both.
- Contact shadow, wet-surface reflection, and dusk lighting: The two are close. LEFT has convincing contact shading and subdued reflections broken up by rough wet pavement, with darker lighting that fits its dusk background. RIGHT has a clearer shoe reflection in the foreground puddle and strong contact shading, though the upper appears more brightly and neutrally lit against the sunset.
Reference images
Prompt & settings used
Prompt
Place the sneaker on a wet outdoor basketball court at dusk. Preserve the exact sneaker shape, black geometric side mark, materials, stitching, sole geometry, and camera angle. Add physically coherent contact, reflections, and dusk lighting.
Cost & latency
Both models start at 25 credits on Banana Pie, so the minimum credit spend is the same whichever you choose. Seedream 5 Pro tops out at 2K output, while Nano Banana 2.1 also offers 4K. In the small latency sample from this comparison, Nano Banana 2.1 ranged from 18.3 to 126.4 seconds, while Seedream 5 Pro ranged from 38.6 to 141.0 seconds. Waiting time varied by scenario, with each model finishing sooner on some tasks.
How we compared & disclosure
This comparison is a reproducible fixed-prompt run: we used one fixed prompt per scenario and one run per model per scenario, with results published as generated. Our tests cover image generation and editing, including typography, object binding, scene preservation, and relighting. Banana Pie sells paid access to both models.
Banana Pie sells paid access to this model alongside other models in one studio. Our verdicts come from tests run through the same pipeline our users get.