Seedream 4.5 vs Nano Banana Pro: Which AI Image Generator Fits Your Workflow?

Choosing between Seedream 4.5 and Nano Banana Pro? It's a legitimate dilemma. Both are powerful AI image generators that deliver stunning results, but they solve completely different problems.

Here's the real issue: AI image generation has evolved past "good enough." Creators today demand more—we want real-world lighting, sharp details that don't collapse under zoom, consistent character design, readable text, and no more melty fingers or blurry backgrounds. Most importantly, we want results that integrate smoothly into real creative pipelines.

Seedream 4.5 and Nano Banana Pro represent two different answers to these needs: one leans into creativity and style, the other leans into realism and logic.

That's why comparing them isn't about "which model is better"—it's about understanding which one aligns with your project goals. Creating artistic content with consistent characters? Seedream 4.5. Generating photorealistic product images for e-commerce? Nano Banana Pro.

In this comparison, I'll break down speed, quality, pricing, and real-world scenarios. By the end, you'll know exactly which tool fits your workflow.

Quick Comparison Table: Seedream 4.5 vs Nano Banana Pro at a Glance

Before we dive deep, here's the TL;DR. This table shows the key differences that actually matter when you're choosing between these two powerhouses.

Quick Verdict: Seedream 4.5 offers consistent pricing and artistic excellence. Nano Banana Pro excels at photorealistic outputs with advanced reasoning capabilities. Both support 4K resolution.

Want to try both? SeaArt AI lets you switch between models with one click. No need for multiple accounts.

Seedream 4.5: The Creative Brain Built for Artistic Workflows

Seedream 4.5 is ByteDance's latest AI image generation model, an advanced upgrade from Seedream 4.0. It delivers stronger performance across key areas: improved consistency in editing (preserving subject details, lighting, and color tones), enhanced portrait refinement, and significantly strengthened multi-image composition capabilities.

This is the model you call when you don't just want an "image"—you want a visual style. It excels at multi-image fusion based on subject consistency, making it ideal for creating character series where faces, style, and atmosphere remain perfectly consistent across multiple outputs.

Core Capabilities

Here's what Seedream 4.5 actually does:

• Native 2K Resolution: Generates at 2K by default, scales up to 4K without quality loss
• 30% Faster Generation: Improved speed over Seedream 4.0, optimized for high-resolution workflows
• Multi-Image Fusion: Blend styles and visual elements from multiple reference images—merge clothing, accessories, or combine people with landscapes
• Subject Consistency: Industry-leading. Preserves subject details, lighting, and color tones across multiple images—perfect for character series or brand mascots
• Enhanced Portrait Refinement: Delivers natural-looking faces with accurate details and expressions
• Batch Image Generation: Create multiple content-related images from a single prompt

Standout Features

Designer-Grade Text Rendering: This is where Seedream 4.5 shines. The model features enhanced small-text generation capabilities—need a poster with "Summer Sale 2025" in perfect typography? It works. Labels, signs, product packaging text—Seedream handles it accurately where competitors still struggle.

Zero-Flaw Philosophy: ByteDance's upgrade focused on eliminating common AI artifacts. No more weird fingers, floating objects, or anatomical nightmares. The model shows significantly fewer errors compared to previous versions.

Creative Freedom: Seedream 4.5 interprets "artistic" prompts better than most. Want a cyberpunk cat in neon Tokyo? It understands the vibe, not just the words.

Best Use Cases:

• Social media graphics with text overlays
• Character design for games/comics
• High-resolution art prints
• Brand identity visuals

Try Seedream 4.5 with the AI image generator—it's free to test with trial credits.

Nano Banana Pro: Photorealistic Image Generation for Commercial Use

Nano Banana Pro is Google's AI model built on Gemini 3 Pro's reasoning engine. It specializes in photorealistic images—outputs that resemble professional photography rather than AI-generated art.

The model focuses on realism: 4K output, clean geometry, consistent lighting logic, and accurate material rendering. Where Seedream 4.5 prioritizes artistic interpretation, Nano Banana Pro prioritizes accuracy and photorealism.

Core Capabilities

What Nano Banana Pro brings to the table:

• Studio-Quality Output: Photorealism that passes the "is this real?" test
• 20-40 Second Generation: Consistent generation time per image, varies based on prompt complexity and resolution
• Prompt Following Accuracy: Gemini 3 Pro's reasoning means it actually understands complex instructions
• Knowledge Integration: Can generate historically accurate scenes or scientifically correct diagrams

Standout Features

Advanced Reasoning: Built on Gemini 3 Pro, the model interprets complex instructions accurately. For example, a prompt like "a 1920s Art Deco office with period-accurate furniture" generates historically appropriate results based on its knowledge base.

Data Visualization: Need charts, infographics, or timelines? Nano Banana Pro handles complex data exceptionally well. Text is clear, layouts make sense.

Commercial-Ready: The photorealism isn't just pretty—it's usable. Product shots, real estate renders, food photography. It works out of the box.

Best Use Cases:

• E-commerce product images
• Marketing materials
• Infographics and data visualization
• Realistic scene generation for presentations

For more details on Nano Banana Pro's capabilities, check out Nano Banana 2 vs Nano Banana 1 comparison.

What Sets Them Apart

Let's get into the details that actually matter. Here's how both models perform across five key areas.

Performance comparison based on internal testing. Scores represent relative performance metrics across five key areas.

1. Image Quality & Resolution

Seedream 4.5: Supports resolutions from 2560×1440 up to 4096×4096 (4K). The detail preservation is excellent—zoom in 300%, and you'll still see crisp edges. Best for prints, high-res social media, and any project where resolution matters.

Nano Banana Pro: Supports 2K (2048×2048) and 4K (4096×4096) resolutions. The photorealism is stunning, with studio-grade quality suitable for both screen use and high-resolution outputs.

Real Test: Using the same landscape prompt on both models shows the difference clearly. Seedream's output has richer colors and artistic interpretation. Nano Banana's looks like a DSLR photo—neutral, realistic, commercial.

Resolution Comparison: Both models support up to 4K resolution, making them suitable for professional use cases requiring high-quality outputs.

2. Generation Speed & Performance

Seedream 4.5: Generates images 30% faster than Seedream 4.0. Exact speed benchmarks aren't confirmed until broader public access, but the performance improvement is significant for high-resolution outputs.

Nano Banana Pro: Generation takes 20-40 seconds per image. The time varies based on prompt complexity and resolution settings.

Real-World Impact: Seedream 4.5's speed advantage becomes more noticeable in high-volume workflows, especially when generating at 2K or 4K resolution. Nano Banana Pro's generation time is consistent but longer per image.

Speed Comparison: Both models deliver quality results, with Seedream 4.5 offering faster throughput for batch generation workflows.

3. Ease of Use & Learning Curve

Seedream 4.5: Intuitive for both beginners and pros. The prompt structure is straightforward—describe what you want, and the model interprets it artistically. Advanced users can fine-tune with style parameters.

Nano Banana Pro: Equally accessible. The model excels at understanding natural language prompts and delivers photorealistic results without requiring complex technical knowledge.

Winner: Tie. Both are accessible for beginners, powerful for pros.

4. Pricing & Access

Seedream 4.5: API-based pricing at $0.04 per image, optimized for bulk and API usage. Pricing remains consistent regardless of output resolution (2K or 4K).

Nano Banana Pro: Available via consumer apps and Vertex AI billing. Pricing is token-based and scales with resolution:

• 2K resolution (2048×2048): $0.139 per image
• 4K resolution (4096×4096): $0.24 per image

Both models offer trial credits through SeaArt AI, allowing you to test capabilities before committing to paid usage.

5. Subject Consistency & Multi-Image Workflows

Seedream 4.5: Industry-leading subject consistency. Generate the same character across multiple images with identical facial features, style, and aesthetic. Perfect for character series, brand mascots, and storytelling projects.

Nano Banana Pro: Excellent for single-image quality but less consistent when generating the same subject across multiple images. Best suited for standalone visuals rather than character series.

Winner: Seedream 4.5 for multi-image consistency. Nano Banana Pro for single-image perfection.

Real-World Test: Same Prompt, Different Results

To understand how each model interprets identical prompts, we tested three scenarios that stress different capabilities: text-heavy product design, creative stylized visuals, and character consistency. The goal isn't to declare an absolute winner but to map which model delivers better outcomes for specific needs—readable text, artistic vision, or multi-image consistency. Read on for side-by-side examples, quick verdicts, and actionable recommendations.

Test 1: Product Packaging with Complex Text

Prompt: "Create a product packaging mockup for 'ORGANIC GREEN TEA' with ingredients list: Water, Green Tea Extract, Natural Honey, Vitamin C. Include nutritional facts and barcode. Clean, modern design with readable text."

Seedream 4.5 Output:

• Product name rendered with artistic, stylized typography
• Ingredients list visible but less sharp—text feels decorative rather than functional

Nano Banana Pro Output:

• All text elements (product name, ingredients, nutritional facts) appeared significantly sharper
• Small print remained readable even at standard viewing distance

The Difference: Both models handled the prompt, but Nano Banana Pro's text clarity is noticeably superior—especially for small print and complex layouts. This advantage makes it the stronger choice for information-dense designs like packaging, infographics, or UI mockups. Seedream 4.5 works better when text serves as a visual design element rather than conveying critical information.

Test 2: Stylized Creative Scene

Prompt: "A futuristic cityscape at sunset, neon signs, flying cars, cyberpunk aesthetic, highly detailed"

Seedream 4.5 Output:

• Vibrant, saturated neon colors with dramatic lighting and high contrast
• Flying cars and buildings felt stylized and imaginative—visually striking for creative projects

Nano Banana Pro Output:

• Natural lighting with balanced color tones—looked like a DSLR photo with sci-fi elements composited in
• Realistic shadows and reflections, but less visually impactful

The Difference: Both models interpreted the "cyberpunk aesthetic" prompt, but with distinct creative directions. Seedream 4.5's output delivers stronger artistic impact—saturated colors, dramatic contrast, and stylized elements that stand out in social feeds or game concept art. Nano Banana Pro prioritizes photorealism and believability, making it better suited for client presentations or commercial pitches where realism matters more than creative flair.

Learn more about Seedream 4.5's improvements in our Seedream 4.5 vs Seedream 4.0 guide.

Test 3: Character Consistency Test

Prompt: "Portrait of a young woman with long black hair, wearing a white dress, standing in a garden, natural lighting, photorealistic"

Seedream 4.5 Output:

• Generated the same character across 5 images with identical facial features, hair style, and aesthetic
• Consistency remained strong even when changing backgrounds and poses

Nano Banana Pro Output:

• Delivered stunning single-image portraits with realistic skin texture and natural lighting
• When generating multiple images, facial features varied slightly

The Difference: Both models produced high-quality portraits, but they excel at different strengths. Seedream 4.5 maintained remarkable consistency across multiple generations—same face, same style, same character identity—making it the superior choice for projects requiring character series (brand mascots, social media campaigns, storytelling). Nano Banana Pro delivers exceptional single-image portrait quality with photorealistic skin tones and lighting, but lacks the multi-image consistency needed for character-driven workflows.

Best Use Cases: When to Choose Each Model

Still not sure? Here's a decision framework based on real workflows.

Choose Seedream 4.5 If You Need:

1. Artistic and Stylized Visuals

• Social media graphics with bold, creative styles
• Character designs for games, comics, or animation
• Concept art for creative projects

2. High-Resolution Outputs (2K-4K)

• Print materials (posters, flyers, merchandise)
• Large-format displays
• High-quality portfolio pieces

3. Perfect Text Rendering for Designs

• Event posters with typography
• Product packaging mockups
• Branded graphics with text overlays

4. Subject Consistency Across Multiple Images

• Character series (same character, different poses)
• Brand mascots (consistent look across campaigns)
• IP development (maintaining visual identity)

5. Creative Storytelling and Imaginative Scenes

• Fantasy art
• Surreal compositions
• Artistic narratives

Real Example: A content creator used Seedream 4.5 to generate a 10-image Instagram carousel featuring the same character in different scenarios. Every image maintained perfect consistency—same face, same style, different backgrounds.

Choose Nano Banana Pro If You Need:

1. Photorealistic Commercial Imagery

• E-commerce product photos
• Real estate renders
• Food photography for menus

2. Fast Generation for Rapid Prototyping

• Testing multiple design concepts quickly
• Client presentations with tight deadlines
• A/B testing visuals for marketing

3. Data Visualization and Infographics

• Charts with clear, readable text
• Timelines and process diagrams
• Educational materials

4. Historical or Scientific Accuracy

• Period-accurate scenes for documentaries
• Scientifically correct diagrams
• Realistic simulations

5. Complex Reasoning-Based Generation

• Multi-step instructions ("Show X in the foreground, Y in the background, with Z lighting")
• Context-aware compositions
• Logical scene construction

Real Example: A marketing agency used Nano Banana Pro to generate 50 product variations for an e-commerce client. Each image looked like a professional studio shot—no editing required.

Try Both on SeaArt: The Best of Both Worlds

Here's the good news: you don't have to choose just one. SeaArt supports both Seedream 4.5 and Nano Banana Pro on a unified platform.

Why This Matters:

• One-Click Model Switching: Test the same prompt on both models instantly
• No Multiple Accounts: Manage everything in one place
• Free Trial Credits: Try both models before committing
• Unified Workflow: Save prompts, organize projects, share results—all in one interface

How to Get Started:

1. Sign up and navigate to the model selection
2. Select Seedream 4.5 or Nano Banana Pro from the dropdown
3. Enter your prompt and generate

Pro Tip: Use the comparison feature. Generate with Seedream, then switch to Nano Banana with the same prompt. See the difference side-by-side before deciding which output to use.

FAQ: Your Questions Answered

Can I create product mockups with accurate text and logos?

Yes, with Nano Banana Pro. The model excels at text accuracy—it can generate readable product labels, store signs, and even UI interfaces with perfect text. Seedream 4.5 also handles small-text generation well for posters and packaging, but Nano Banana Pro is generally more reliable for complex text scenarios like nested UI elements or mathematical formulas.

How do I maintain character consistency across multiple images?

Use Seedream 4.5's multi-image fusion feature. The model preserves subject details, lighting, and color tones across generations—perfect for creating character series where the same face, style, and atmosphere need to remain consistent. This is ideal for storyboards, comic development, or marketing campaigns with branded characters.

Which model should I use for e-commerce product photography?

Nano Banana Pro. It specializes in photorealistic outputs that resemble professional studio photography. The model understands real-world lighting, accurate material rendering, and clean composition—eliminating the need for expensive product photography sessions. Seedream 4.5 is better for artistic product concepts or stylized brand visuals.

Can I generate images at 4K resolution without quality loss?

Both models support up to 4K resolution. Seedream 4.5 generates natively at 2K and scales to 4K without quality degradation. Nano Banana Pro supports 2K (2048×2048) and 4K (4096×4096) with native high-resolution rendering. Both maintain image quality at maximum resolution.

Do I need to write detailed prompts, or can I keep it simple?

Both models work with simple prompts. Seedream 4.5 is more forgiving with basic descriptions—just say what you want. Nano Banana Pro benefits from detailed prompts due to its Gemini 3 Pro reasoning engine, but it still produces good results with straightforward instructions. Start simple and add details if needed.

What QA and legal checks should I run before commercial use?

Confirm copyright and licensing terms for model outputs. Check the platform's Terms of Service for commercial use permissions. Verify that training data won't cause IP issues. Run content checks for likeness rights, sensitive attributes, and brand compliance. Include a human QA checklist: text accuracy, skin-tone fidelity, color matching, and artifact inspection before delivering to clients.

Final Verdict: Which Should You Choose?

Seedream 4.5 and Nano Banana Pro are not competitors—they're specialists.

Choose Seedream 4.5 if you need:

• Artistic, stylized visuals
• High-resolution outputs (2K-4K)
• Perfect text rendering
• Character consistency across series
• Creative storytelling and concept art

Choose Nano Banana Pro if you need:

• Photorealistic, commercial-grade images
• Fast generation for rapid prototyping
• Product photography and e-commerce visuals
• Data visualization and infographics
• Realistic portraits and lifestyle scenes

The real power isn't in choosing one tool—it's in knowing when to use which one.

Ready to test both? Start with the free AI art generator and begin creating. Your first few images are free—no credit card required.