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Seedream AI Image Generator — ByteDance's Image Model, Free Online
Bytedance Seedance gives you browser access to Seedream — ByteDance's AI image model, built by the same team behind Seedance 2.0. Seedream uses Chain-of-Thought visual reasoning to plan spatial relationships and physical constraints before rendering pixels, producing more coherent multi-figure compositions and precise environmental detail. Generate from a text prompt or upload up to 14 reference images to lock style, character appearance, and visual identity across an entire series. The same workspace includes GPT Image for typography-accurate graphics, Flux 2 Pro for rapid batch production, and Nano Banana for cross-image character consistency. High-resolution output, text-to-image and image-to-image, no download or GPU required.
AI Image Models on Bytedance Seedance — Seedream, GPT Image 2, Flux 2 Pro, and Nano Banana
Seedream handles complex compositions and reference-guided image series. GPT Image renders typography at near-perfect accuracy. Flux 2 Pro runs batch production in under 10 seconds. Each model leads its own category — pick by what your image requires.
GPT Image 2
OpenAI · Typography at 99%+ Accuracy — Thinking Mode, Up to 4K
The model for any image that needs readable text. GPT Image 2 uses Thinking Mode to resolve the composition before rendering pixels — placing typography, sizing it correctly, and applying font weight in a dedicated reasoning step — producing 99%+ character accuracy across Latin, CJK, Arabic, Hindi, and Bengali scripts. Product labels, poster headlines, menu items, packaging callouts, and multilingual signage all render correctly without post-production corrections. Outputs up to 4K. Accepts up to 16 reference images for editing tasks with text preserved throughout.
Seedream 4.5
ByteDance · 4K Native Output — 8 Reference Images, Bilingual Text Rendering
ByteDance's 4K image engine. Seedream 4.5 renders natively at up to 4K resolution across eight aspect ratios including 21:9 ultrawide — the right choice for large-format print, widescreen production art, billboard assets, and high-resolution commercial output. Accepts up to 8 reference images for style-locked remixes and image series. Delivers among the highest text rendering accuracy for both English and Chinese scripts.
Flux 2 Pro
Black Forest Labs · Batch Production Speed — Sub-10-Second per Image
The engine for volume output. Flux 2 Pro generates a 1K image in under 10 seconds — fast enough to run an entire content calendar batch in a single session. Benchmark-leading win rate in blind photorealism tests for material surfaces and environmental detail. Generates at 1K and 2K across seven aspect ratios. Choose Flux 2 Pro when iteration speed and throughput matter more than maximum resolution.
Nano Banana Pro
Google DeepMind · Character-Locked Across Every Image — 8 Reference Photos
The character consistency engine. Upload up to 8 reference images and Nano Banana Pro locks face structure, hairstyle, clothing details, and brand marks as fixed constraints across every image in a series. Front views, side profiles, expression sheets, and costume variants all maintain the same recognizable character identity without drift between generations. Outputs up to 4K across 11 aspect ratios.
Nano Banana 2
Google DeepMind · Google Search Grounding — 15 Ratios, 14 References
The accuracy engine for real-world subjects. Nano Banana 2 queries Google Search before rendering to verify the visual appearance of specific brand logos, actual landmarks, and current product designs — producing representations that match real-world references rather than approximations. Accepts up to 14 reference images. Outputs at 4K across 15 aspect ratios — the widest aspect ratio selection on this platform.
Seedream 5 Lite
ByteDance · Chain-of-Thought Visual Reasoning — Complex Multi-Figure Scenes
ByteDance's spatial reasoning engine for complex image generation. Seedream 5 Lite applies Chain-of-Thought visual reasoning — generating an internal spatial plan before rendering pixels — to produce correct depth relationships, accurate occlusion between overlapping subjects, and physically plausible environments in multi-figure scenes. Where standard models collapse complex arrangements into flat compositions, Seedream 5 Lite maintains spatial separation. Outputs at 2K or 3K across eight aspect ratios including 21:9. Accepts up to 14 reference images.
Seedream's Chain-of-Thought Visual Reasoning — How It Works
Standard diffusion models generate images by sampling from noise in a single pass — responsive to text prompts but without an internal planning step. Seedream 5 Lite introduces Chain-of-Thought visual reasoning: before rendering any pixels, the model generates an internal plan that maps spatial relationships between subjects, resolves physical constraints such as which object is in front and how surfaces interact, and sequences the compositional steps that produce a coherent image. The result is visible in complex scenes: multi-figure arrangements where subjects maintain correct spatial separation, environments where objects interact physically rather than float, and compositions where depth relationships hold across the full canvas. Chain-of-Thought visual reasoning is ByteDance's named architectural innovation for Seedream 5 Lite — a built-in reasoning step that runs before generation, not a prompt technique.
What Creators Use This AI Image Generator For
Seedream leads for spatial reasoning and brand visual series. GPT Image 2 leads for typography. Nano Banana leads for character consistency. Each matched to the engine that best serves it.
Brand & Commercial Imagery
Lock brand visuals and typography across every asset with reference-guided generation
Upload product photos or brand assets and Seedream 4.5 anchors every generated image to your visual language — consistent color palette, surface finish, and product appearance across an entire campaign batch. GPT Image 2 handles assets where readable text must appear: product labels, poster headlines, packaging callouts. Both engines output at up to 4K with commercial licensing and no watermark.
Consistent Character Across a Series
The same face, outfit, and visual identity across every image in the series
Nano Banana Pro locks character identity as a fixed constraint. Upload four to eight reference photos and generate front views, side profiles, expression sheets, and costume variants — every frame maintains the same face structure, hairstyle, and clothing details without identity drift. For complex multi-figure scenes where spatial relationships between characters matter, Seedream 5 Lite resolves occlusion and depth correctly before rendering. Outputs up to 4K across 11 aspect ratios.
E-Commerce Product Photography
4K product shots and lifestyle scenes without booking a studio
Seedream 4.5 renders product images natively at up to 4K — no upscaling — across eight aspect ratios for packaging, large-format print, and billboard use. Flux 2 Pro handles batch SKU runs in under 10 seconds per image. Both engines support image-to-image: upload your product on a plain background and generate it in a styled scene. All outputs are commercially licensed and watermark-free.
Concept Art & Complex Scene Composition
Multi-figure scenes with correct spatial relationships — rendered, not approximated
Seedream 5 Lite applies Chain-of-Thought visual reasoning before rendering — planning spatial relationships, resolving which subjects are in front, and handling physical interactions between overlapping figures. For concept art, storyboard panels, and multi-character compositions where standard models collapse depth into flat arrangements, Seedream 5 Lite maintains the spatial logic described in the prompt. Outputs at 2K or 3K across eight aspect ratios including 21:9. Accepts up to 14 reference images.
Prompt Templates — Image Generation and Editing
Four production-ready prompts, each matched to the engine where it performs best on this platform. Copy directly or adapt for your project.
Brand Poster with Readable Typography
Best with GPT Image 2 — 99%+ text accuracy, Thinking Mode typography composition
"Bold event announcement poster, deep navy background, large centered sans-serif headline reading "SUMMER DROP — July 18", secondary line "Limited to 500 units" in smaller weight, brand accent in coral orange. Clean geometric layout, no photographic elements. 3:4 portrait format."
Character Portrait for a Consistent Series
Best with Nano Banana Pro — 8 reference images, identity-locked across every frame
"Game character design sheet — same male protagonist, age 24, short dark hair, scar above left eyebrow, wearing a deep green tactical jacket. Three views: front facing, 45-degree profile, rear view. Consistent face structure, same jacket zipper and shoulder patch in all three frames. Clean white background, character sheet layout."
Product Shot at 4K with Lifestyle Scene
Best with Seedream 4.5 — native 4K, 8 reference images for style anchoring
"Luxury skincare serum bottle on a white marble surface, soft diffused overhead light, subtle warm reflection on the bottle surface, small droplets of serum beside the bottle. Clean commercial product photography, no text elements, 3:4 portrait ratio, native 4K resolution."
Multi-Figure Scene with Correct Spatial Depth
Best with Seedream 5 Lite — Chain-of-Thought reasoning handles complex spatial arrangements
"Two figures in a narrow cobblestone alley at dusk — a woman in the foreground reaching toward a wooden door, a man slightly behind and to the right with his back to camera. Warm lantern light from the left, long evening shadows. Correct depth: woman clearly in front, man partially occluded by her figure and the doorframe. Cinematic 2.39:1 aspect ratio."
Prompt Techniques That Improve AI Image Results
- • Match the engine to the task before writing the prompt - Engine selection matters more than prompt refinement for output quality. Identify what your image requires — readable text, maximum resolution, character consistency, batch speed, or spatial accuracy in a multi-figure scene — then select the engine optimized for that property. GPT Image 2 for text, Seedream 4.5 for 4K, Nano Banana Pro for character series, Flux 2 Pro for volume, Seedream 5 Lite for complex spatial arrangements.
- • Quote the exact text that must appear in the image - For GPT Image 2, put quoted text directly in the prompt: a product label reading CLARITY SERUM, or a headline reading SUMMER DROP. Named, quoted text renders at 99%+ accuracy across Latin, CJK, and Arabic scripts. Described text — a label with the brand name — is treated as visual texture, not semantic content, and renders inconsistently.
- • Name the medium and lighting source, not just the subject - Writing editorial product photography on a white marble surface with soft overhead light activates genre-specific rendering behaviors across all engines. The medium framing changes how the model handles light direction, crop, and depth — more reliably than adding style adjectives after the subject description. Name the light source type and direction explicitly: diffused side window light from the left, or hard rim light from behind.
- • State your aspect ratio for correct compositional framing - Write the target format into the prompt — 9:16 vertical, 21:9 widescreen, 3:4 portrait — so the model applies correct compositional framing from the first pass. Seedream 4.5 and Seedream 5 Lite both support 21:9 natively. Nano Banana 2 supports 15 ratios. Without an explicit format, the model defaults to its trained distribution, which may not match your intended output dimensions.
How to Create AI Images — Three Steps
From prompt to watermark-free download in one session. Text-to-image and image-to-image across every model — no software to install.
Write your prompt or upload reference images
Describe the subject, scene, lighting, style, and any text that must appear inside the image. For image-to-image mode, upload reference photos to anchor appearance, character identity, or visual style — Seedream 4.5 and Nano Banana 2 accept up to 14 references; Nano Banana Pro accepts up to 8; GPT Image 2 accepts up to 16. Text-only prompts also work — reference uploads are optional, not required.
Select the model that matches your task
GPT Image 2 for images where text must be readable — product labels, poster headlines, multilingual scripts. Seedream 4.5 for 4K output and bilingual text rendering. Seedream 5 Lite for complex multi-figure spatial scenes. Nano Banana Pro for character-consistent series from reference photos. Nano Banana 2 for real-world brand and location accuracy. Flux 2 Pro for high-volume batch production.
Download and use commercially
Generation takes 5 to 60 seconds depending on the model and resolution. Output is a clean PNG or JPEG — watermark-free on paid plans, fully licensed for commercial use including advertising, product packaging, client deliverables, and social media publishing. Run the same prompt on a second engine to compare before downloading.
Complete Your Creative Pipeline
Generate images with Seedream, then animate them into video with Seedance 2.0, add lip sync, or generate voiceover — all from the same Bytedance Seedance platform.
Seedream AI Image Generator — Frequently Asked Questions
Common questions about Seedream, model selection, text rendering, character consistency, and how to get the best results from each engine.
Generate with Seedream — Free on Bytedance Seedance
Seedream by ByteDance — Chain-of-Thought visual reasoning, native 4K, bilingual text rendering. GPT Image 2 for typography accuracy. Flux 2 Pro for batch speed. Nano Banana for character consistency. Text-to-image and image-to-image from the same workspace — no download, no GPU required.