Based on 10,000+ real production generations inside HummingBytes
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Nano Banana Pro vs Seedream 4.5: Full Image Model Comparison (2026)
If you are choosing between Nano Banana Pro (Gemini 3 Pro Image) and Seedream 4.5, you are already looking at two of the strongest image generation models available today.
Seedream 4.5 is often the better choice for lower-cost portrait batches and face fidelity. Nano Banana Pro is the better choice when you need real-world accuracy, stronger UI mockups, and fewer mistakes in complex prompts.
Nano Banana Pro vs Seedream 4.5 (Quick Summary)
Here is the fastest way to understand the tradeoff.
| Category | Seedream 4.5 | Nano Banana Pro |
|---|---|---|
| Price (4K image) | 5 credits | 30 credits |
| Speed (4K) | ~45 seconds | 60-120 seconds |
| Best at | Portraits + face fidelity | Maximum realism + versatility |
| Prompt adherence | Excellent | Excellent + system-level control |
| Subject resemblance | Best-in-class | Can drift unless prompted carefully |
| Text rendering | Very strong | Strong, especially for infographics |
| UI/UX mockups | Decent | Best-in-world |
| Real-world accuracy | Good | Outstanding (landmarks, products, cars) |
Price (4K image)
Seedream 4.5
5 credits
Nano Banana Pro
30 credits
Speed (4K)
Seedream 4.5
~45 seconds
Nano Banana Pro
60-120 seconds
Best at
Seedream 4.5
Portraits + face fidelity
Nano Banana Pro
Maximum realism + versatility
Prompt adherence
Seedream 4.5
Excellent
Nano Banana Pro
Excellent + system-level control
Subject resemblance
Seedream 4.5
Best-in-class
Nano Banana Pro
Can drift unless prompted carefully
Text rendering
Seedream 4.5
Very strong
Nano Banana Pro
Strong, especially for infographics
UI/UX mockups
Seedream 4.5
Decent
Nano Banana Pro
Best-in-world
Real-world accuracy
Seedream 4.5
Good
Nano Banana Pro
Outstanding (landmarks, products, cars)
Try Nano Banana Pro on HummingBytes
HummingBytes lets you generate with both Nano Banana Pro and Seedream 4.5 in one workflow with no setup and no platform switching.
Quick Rule of Thumb
- Portraits and reference faces at scale: Seedream 4.5.
- Real places, objects, and perfect realism: Nano Banana Pro.
- No room for mistakes: Nano Banana Pro.
Image Generation Comparisons
Below are real outputs generated inside HummingBytes using the exact same prompts.
For prompt-only tests, drag each slider to compare Seedream 4.5 against Nano Banana Pro. For tests with uploaded references, use the model toggles to compare the same input image against each model.
Portrait Headshot (Seedream 4.5 Sweet Spot)
Seedream is often the best value model for generating professional headshots with clean studio backgrounds.
Maintains closer facial resemblance and preserves the original expression more accurately.
Complex Realism Prompt (Underwater Cinematic Test)
For highly detailed, physically complex scenes, Nano Banana Pro tends to preserve realism, lighting behavior, and material detail more reliably.
Underwater light behavior, skin texture, and depth cues are generally more convincing and coherent.
Landmark Accuracy (Torres del Paine Test)
When a prompt depends on a real, recognizable location, Nano Banana Pro is more reliable at preserving landmark identity and environmental realism.
Torres del Paine landmark recognition and background coherence are stronger with fewer hallucinated geography details.
Named Object Fidelity (Ferrari 812 Test)
This test checks whether each model can reproduce a real Ferrari 812 Competizione, not just a generic supercar look.
Seedream resembles a Ferrari-like car but misses key 812 Competizione signatures; Nano Banana Pro is much closer to the real model in geometry, vents, and rear detailing.
UI Mockup Generation (Nano Banana Pro Showcase)
Nano Banana Pro is stronger for professional UX/UI design and realistic product mockups.
Layout coherence, visual hierarchy, and realistic product rendering are more consistent.
Complex Infographic Composition
For posters, infographics, and multi-element compositions, Nano Banana Pro tends to nail detail with fewer mistakes.
Multi-element arrangement and text alignment remain cleaner with fewer visual collisions.
Poster Composition Test
This test focuses on visual composition, texture realism, and art direction in a cinematic poster-style scene.
Cleaner negative space discipline and more balanced typography integration, resulting in a stronger poster-ready composition.
Typography + Design Composition Test
This test evaluates typography quality, hierarchy, and composition discipline in a luxury poster layout.
Stronger vertical hierarchy and cleaner separation between headline block and product, resulting in a more traditional luxury poster composition.
Text Rendering Test
When a prompt requires readable typography and clean text hierarchy, Seedream 4.5 often delivers stronger out-of-the-box clarity.
Text blocks are more readable with fewer letter distortions in this test, and the Nano Banana Pro result also missed the QR code.
Image Editing Comparisons
Both models received the same input image and prompt. Drag each slider to compare the editing results.
These tests evaluate how well each model preserves identity, handles edge separation, and integrates edits into a coherent result.
Identity-Preserving Background Change
Both models receive the same portrait and must replace only the background while keeping the subject's face, expression, clothing, and pose completely unchanged.
Better identity preservation and more coherent environmental integration.
Person Removal (Object Erasure)
Both models receive an image of a couple and must cleanly remove one person while preserving everything else about the scene.
Almost no change to the original image aside from the removal. Seedream altered colors, camera angle, and several other aspects.
Text Replacement on Physical Sign
Both models receive a photo of a letter board sign and must replace one word while preserving the sign's physical appearance and surroundings.
Input photo by Mark Adriane on Unsplash
Preserved the flat letter style and scene faithfully. Seedream made the text look 3D and altered the sign appearance.
Clothing Replacement (Garment Swap)
Both models receive a street portrait and must replace only the outer jacket with a different garment while preserving everything else.
Input photo by Arthur Edelmans on Unsplash
Preserved body proportions and other clothing faithfully. Seedream altered body proportions and other clothing pieces despite explicit constraints.
Lighting Transformation (Identity Under Extreme Light Shift)
Both models receive the same portrait and must apply a dramatic cinematic night relight while preserving identity, expression, pose, clothing, and scene structure.
Input photo by Benjamin Fay on Unsplash
Provided better identity stability while adapting to extreme lighting conditions.
Object Removal (Background Crowd Cleanup)
Both models receive the same street portrait and must remove background people while preserving the subject and reconstructing the environment naturally.
Input photo by Nick Fithen on Unsplash
Stronger geometric stability and cleaner environmental reconstruction after removing background subjects.
Seedream 4.5 is a specialist
Up to 6x cheaper than Nano Banana Pro · ~45 seconds · Best-in-class face fidelity
If your workflow is portrait-heavy and cost-sensitive, Seedream 4.5 is often a strong option: it delivers very good face fidelity at a much lower price than Nano Banana Pro, even if it is not perfect in every case.
- Best-in-class face fidelity in many portrait tasks.
- Excellent prompt adherence for clean compositions.
- Up to 6x cheaper than Nano Banana Pro per image.
Nano Banana Pro is an anything model
Best-in-world UI mockups · Outstanding landmark accuracy · Top-tier realism
When the prompt is complex, the subject is real, or the output needs to look flawless, Nano Banana Pro consistently outperforms across categories.
- Best photorealism for complex environments.
- Stronger named object and landmark fidelity.
- Best-in-world UX/UI mockup generation.
FAQ: Nano Banana Pro vs Seedream 4.5
Is Nano Banana Pro better than Seedream 4.5?
Which model is best for headshots?
Which model is best for real places and objects?
Which model should I use for UI mockups?
Can I use both models in one workflow?
Which model is faster for batch generation?
Do both models support high-resolution outputs?
How we tested
All outputs were generated at 4K resolution using default model settings inside HummingBytes, with no post-processing applied. Each model received the same prompt and, where applicable, the same reference image. Tests were last run in February 2026. Results may vary as models are updated.
Try Nano Banana Pro on HummingBytes
HummingBytes lets you generate with both Nano Banana Pro and Seedream 4.5 in one workflow with no setup and no platform switching.