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Happy Horse AI Image Generator — GPT Image 2, Nano Banana Pro, Seedream, Free Online
Happy Horse — the platform behind the #1-ranked AI video model — gives you access to the most capable AI image generation engines in one browser workspace. GPT Image 2 achieves ~99% character accuracy across Latin, CJK, Arabic, and more, with reasoning-based composition and 4K output. Nano Banana Pro (Gemini 3 Pro Image) locks character identity across image series using up to 8 reference photos. Seedream 5.0 renders native 4K without upscaling across eight aspect ratios including 21:9. Flux 2 Pro generates in under 10 seconds for high-volume batch work. Every engine handles both text-to-image and image-to-image input. Free to start, watermark-free downloads.
AI Image Models in the Happy Horse Workspace
Six specialized engines — each leads its own category. Pick by what your image actually requires, not by brand name.
GPT Image 2
OpenAI · ~99% Text Accuracy — 4K, Reasoning-Based
The engine to use when your image needs readable typography. GPT Image 2 achieves ~99% character accuracy across Latin, CJK, Arabic, Hindi, and Bengali scripts — it plans composition and text placement using chain-of-thought reasoning before generating pixels. Posters, product labels, menus, packaging callouts, and mixed-script graphics all render correctly without post-production corrections. Outputs up to 4K at roughly 2× the speed of its predecessor.
Seedream 5.0
ByteDance · Native 4K — Up to 4096×4096 px
Choose Seedream 5.0 when your output needs to fill a large canvas without upscaling. It renders natively at up to 4096×4096 px across eight aspect ratios including 21:9 ultrawide — the right choice for widescreen production art, large-format print, billboard assets, and environmental matte paintings. Image-to-image mode accepts up to 14 reference photos for style-locked remixes and visual series.
Flux 2 Pro
Black Forest Labs · Sub-10-Second Generation — Photorealism Leader
The highest-throughput engine for volume production. Flux 2 Pro generates a 1K image in under 10 seconds — fast enough to run 100 product variants or ad variations in a single session. Benchmark-leading win rate in head-to-head blind photorealism tests. Covers 7 aspect ratios at 1K and 2K resolution. Choose Flux 2 Pro when iteration count matters more than maximum resolution.
Nano Banana Pro
Google DeepMind · Gemini 3 Pro — Character-Locked Across Every Image
Nano Banana Pro (Gemini 3 Pro Image) is the character and identity engine. Feed up to 8 reference images and the model treats face structure, hairstyle, clothing details, and brand marks as hard constraints that hold across every image in a series. Front views, side profiles, expression sheets, and costume variants all come out as the same recognizable character — without identity 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 prompts that reference the real world. When your brief names a specific brand logo, an actual landmark, a current product design, or a recognizable location, Nano Banana 2 queries Google Search to verify visual appearance before rendering. Accepts up to 14 reference images. Outputs at 4K across 15 aspect ratios — the widest selection on this platform.
Seedream 5 Lite
ByteDance · Chain-of-Thought Spatial Reasoning — Multi-Figure
The spatial reasoning engine for complex multi-figure scenes. When a prompt describes overlapping subjects, precise depth relationships, or choreographic positioning that standard models tend to merge or distort, Seedream 5 Lite builds an intermediate spatial plan using Chain-of-Thought logic before generating. Outputs at 2K or 3K across eight aspect ratios including 21:9. Choose it when spatial logic matters more than maximum resolution.
Text to Image and Image Editing — Both Modes, One Happy Horse Workspace
Most AI image generators offer either generation or editing — not both. The Happy Horse workspace runs all six engines in a unified interface: type a prompt and generate from nothing, or upload reference images and steer the output. GPT Image 2 accepts up to 16 reference photos for precise targeted edits with ~99% text accuracy preserved throughout. Seedream 5.0 takes up to 14 references for style-locked 4K remixes. Nano Banana Pro uses up to 8 references to hold character identity across an entire image series. Switch between text-to-image and image-to-image without leaving the page. All outputs download watermark-free.
Who Uses This AI Image Generator — and Which Engine Fits Each Brief
Four production workflows mapped to the engines that best serve them. Match your output type to the right model before writing the first prompt.
Social Content Production — Branded Graphics at Scale
Run a 30-image content batch in the time a design brief takes to draft
Flux 2 Pro generates in under 10 seconds per image — fast enough to produce an entire content calendar batch in a single session. GPT Image 2 adds readable headlines and branded callouts directly inside the image without post-production corrections. Export every asset as clean PNG or JPEG with no watermark. No design software, no template dependency — write the prompt, set the aspect ratio, generate directly to your asset folder.
Character Design & Game Asset Libraries
A full character sheet with consistent face and outfit from a single reference set
Nano Banana Pro locks character identity as a hard constraint, not a style suggestion. Load four to eight reference photos of your character and generate front views, side profiles, expression sheets, and costume variants — every frame keeps the same face structure, hairstyle, and clothing details. Output at 4K across 11 aspect ratios. No identity drift between generations, no manual corrections between sheets.
Product Photography & E-Commerce Assets
4K product shots and lifestyle scenes without booking a studio
Seedream 5.0 renders product images natively at 4096×4096 px — no upscaling — across eight aspect ratios for packaging, large-format print, and billboard use. Flux 2 Pro handles batch SKU runs for variant and color collections. 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.
Brand Design & Agency Creative Work
Real-world brand and location accuracy for client deliverables
Nano Banana 2 queries Google Search before rendering, producing accurate visual representations of actual brand logos, recognizable landmarks, and current product designs. Accepts up to 14 reference images across 15 aspect ratios. For creative work where visual accuracy to a real-world subject matters — client pitches, location-based campaigns, branded scene compositions — Nano Banana 2 is the go-to engine on this platform.
Prompt Templates — Copy, Adapt, Generate
Four production-ready prompts, each matched to the engine where it performs best on this platform. Copy directly or use as a starting point.
Photorealistic Portrait for Social Content
Best with Flux 2 Pro — sub-10-second, photorealism leader
"Editorial portrait of a woman in her early 30s, natural wave hair, soft side window light from the left, warm skin tones, minimal makeup, cream linen shirt, shallow depth of field, background softly blurred to green-grey, 4:5 aspect ratio, magazine photography style"
Social Graphic with Readable Headline
Best with GPT Image 2 — ~99% text accuracy across scripts
"Bold social media announcement card, dark navy background, large centered text reading "Summer Drop — July 18", secondary text "Limited to 500 units", brand accent in coral orange, clean sans-serif typography, 1:1 square format, product launch graphic style"
E-Commerce Product Shot at 4K
Best with Seedream 5.0 — native 4K, eight aspect ratios
"Luxury skincare serum bottle on a white marble surface, soft diffused overhead light, subtle warm reflection on the bottle surface, label reading "CLARITY — Vitamin C Serum", droplets of serum beside the bottle, 3:4 portrait ratio, clean commercial product photography, native 4K resolution"
Character Sheet with Cross-Image Identity
Best with Nano Banana Pro — 8 references, identity-locked
"Game character design sheet: same male protagonist, age 24, short dark hair, scar above left eyebrow, wearing a deep green tactical jacket. Show three views: front facing, 45-degree profile, and rear view. Consistent facial structure, same jacket zipper and patch details across all three frames. Clean white background, character sheet layout"
Prompt Techniques That Change What You Get
- • Name the medium, not just the subject - Writing 'editorial product photography' or 'architectural illustration' activates genre-specific rendering behaviors across all engines. The medium framing changes how the model handles light, crop, and depth — more reliably than adding style adjectives after the fact.
- • Quote the exact text you need to appear - For GPT Image 2, put quoted text directly in the prompt: 'a product label reading "GROVE ESTATE — Cold Pressed"'. 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.
- • State your aspect ratio intent early - Seedream 5.0 supports 21:9 ultrawide natively. Nano Banana 2 supports 15 ratios. Write your target format into the prompt — 'widescreen 21:9 for banner use' — so the model applies correct compositional framing from the first pass, not as an afterthought.
- • Match the engine to the task, not the prompt style - A character consistency prompt on Flux 2 Pro won't hold face identity across images. The same prompt on Nano Banana Pro with 8 reference images will. Prompt quality matters less than engine selection when the task has a defined output requirement.
How to Create AI Images — Three Steps
From idea to watermark-free download in under a minute. No software to install, no account required to start generating.
Write Your Prompt
Describe the subject, scene, lighting, style, and any text that needs to appear inside the image. English and Chinese prompts both work. Specific detail produces more predictable output — name the light source, the intended medium, and the target aspect ratio.
Select the Right Engine
GPT Image 2 for readable typography and text-heavy compositions. Seedream 5.0 for native 4K across widescreen ratios. Flux 2 Pro for high-volume batch work at sub-10-second speed. Nano Banana Pro for character-locked series. Nano Banana 2 for real-world brand and location accuracy. Seedream 5 Lite for complex multi-figure spatial scenes.
Download Watermark-Free
Generation takes 5 to 60 seconds depending on the engine and resolution selected. Output is a clean PNG or JPEG — no watermark, no platform branding. Run the same prompt on a second engine to compare before downloading.
Complete Your Creative Pipeline
Take your generated images further — animate them into video, add lip sync, or generate voiceover — all from the same Happy Horse platform.
Happy Horse AI Image Generator — Frequently Asked Questions
Common questions about the models, image quality, commercial rights, and how to get the best results.
Start Creating — Your First AI Image Is Free
GPT Image 2 achieves ~99% text accuracy across multilingual scripts with 4K output and chain-of-thought composition. Nano Banana Pro holds character identity across complete image series with up to 8 references. Seedream 5.0 renders native 4096×4096 px across eight aspect ratios including 21:9. Flux 2 Pro generates in under 10 seconds for volume work. Nano Banana 2 grounds real-world subjects with Google Search across 15 ratios. Seedream 5 Lite handles complex multi-figure spatial compositions. All six engines in the Happy Horse workspace — free to start, watermark-free downloads.