Flux Ultra 1.1 vs Seedream 4.5
Hyperrealistic renders indistinguishable from photographs — see how these models compare with real AI-generated outputs.
Full comparisonCompare Models (select 4)
For truly photorealistic generation—images that read like real camera captures—small differences in skin texture, lens behavior, lighting roll-off, and material response matter. Flux Ultra 1.1 and Seedream 4.5 are both positioned for high-quality output on Influencer Studio, but they approach “realism” from slightly different strengths.
This comparison focuses exclusively on hyperrealistic results: how convincingly each model handles faces, hands, fabrics, reflections, depth of field, and the subtle imperfections that make an image feel photographed rather than rendered.
Which Model Should You Choose?
Short answer: Flux Ultra 1.1 is better for premium photoreal detail, while Seedream 4.5 is better for versatile editing. If you are creating photorealistic, start with Seedream 4.5 because it costs fewer credits per output and lets you test more directions, then switch to Flux Ultra 1.1 for polished, higher-resolution final assets.
| If you need… | Choose | Why |
|---|---|---|
| Lower-cost exploration and more variants per credit | Seedream 4.5 | Seedream 4.5 costs 16 credits to start, so you can test more directions for less. |
| Polished, ready-to-ship final assets | Flux Ultra 1.1 | Flux Ultra 1.1 produces stronger final-asset polish for campaign-ready output. |
| Readable text in designs, overlays, and packaging | Seedream 4.5 | Seedream 4.5 renders labels and typography more cleanly. |
| Editing and reference-driven iteration | Seedream 4.5 | Seedream 4.5 is more flexible for editing from references or existing outputs. |
| Consistent characters and repeated campaign visuals | Either model | Either model holds character and style consistency better across outputs. |
| Photorealistic specifically | Flux Ultra 1.1 | Flux Ultra 1.1 scores higher on realism, which matters most for photorealistic. |
How They Compare, Criterion by Criterion
| Criteria | Flux Ultra 1.1 | Seedream 4.5 | Winner |
|---|---|---|---|
| Realism | ●●●●● | ●●●●○ | Flux Ultra 1.1 |
| Text accuracy | ●●○○○ | ●●●○○ | Seedream 4.5 |
| Editing flexibility | ●●○○○ | ●●●●○ | Seedream 4.5 |
| Cost efficiency | ●●●○○ | ●●●●○ | Seedream 4.5 |
| Final polish | ●●●●● | ●●●●○ | Flux Ultra 1.1 |
| Consistency | ●●●●○ | ●●●●○ | Tie |
| Best first test | ●●●○○ | ●●●●○ | Seedream 4.5 |
How We Compare These Models
Models compared
Flux Ultra 1.1 vs Seedream 4.5
Use case
Photorealistic
Flux Ultra 1.1 — best for
premium photoreal detail
Seedream 4.5 — best for
versatile editing
Flux Ultra 1.1 — avoid if
You need editing, text accuracy, or low-cost iteration
Seedream 4.5 — avoid if
You need premium hero-level polish or perfect text
Credits per image (Flux Ultra 1.1)
16 credits
Credits per image (Seedream 4.5)
16 credits
Last updated
June 8, 2026
What the Examples Show
Realism
Flux Ultra 1.1 tends to produce more natural skin texture, lighting, and detail in these outputs.
Text accuracy
Seedream 4.5 renders any labels, overlays, or typography more cleanly.
Commercial usability
Flux Ultra 1.1 is closer to a ready-to-use image asset; Seedream 4.5 is better for concepting.
Recommended next step
Use Seedream 4.5 for first-pass variants, then Flux Ultra 1.1 for final polish.
Photorealistic — Side-by-Side Results
Prompt
"Hyperrealistic DSLR-quality photo of a 22–28-year-old woman with shoulder-length wavy dark brown hair in a cozy hoodie and black leggings, holding her phone slightly above eye level for a casual front-camera selfie while glancing near the lens mid-sentence. She’s standing in a small kitchen with a cluttered counter (coffee mug, toast, skincare bottles), morning window light spilling in naturally with soft shadows and realistic skin texture/imperfections. Authentic TikTok “day in my life” vibe, candid expression, slightly messy hair, no editorial posing."
Feature Comparison
| Feature | Flux Ultra 1.1 | Seedream 4.5 |
|---|---|---|
| Provider | Black Forest Labs | ByteDance |
| Subcategories | text-to-image | text-to-image, image-to-image |
| 1080p / 2k Mode | Yes | Yes |
| 4k Mode | No | No |
| NSFW Rating | Strict | Low |
| Aspect Ratio | 1:1, 16:9, 9:16, 3:4, 4:3, 21:9 | 1:1, 16:9, 9:16, 3:4, 4:3 |
| Starting Price | 16 credits | 16 credits |
Flux Ultra 1.1 Strengths
- Exceptional micro-detail for skin, hair, fabric weave, and fine textures that sell a “shot on camera” look
- Strong photorealistic lighting and material rendering (metal, glass, skin sheen) with crisp, premium clarity
- Great for hero images where realism at close inspection is the priority (portraits, product close-ups, editorial-style shots)
- Consistently high-end output without needing heavy prompt engineering to reach a realistic baseline
Seedream 4.5 Strengths
- Image-to-image editing makes it easier to refine a near-photoreal result without restarting from scratch
- Versatile realism across scenarios (portraits, interiors, lifestyle) while maintaining high resolution and clean output
- Practical for iterative workflows: adjust composition, wardrobe, background, or lighting direction through edits
- Good balance of realism and controllability when you need multiple variations that stay on-brief
Verdict
If your priority is maximum photoreal “premium finish” detail—especially for close-up portraits or product-style hero frames—Flux Ultra 1.1 is typically the stronger pick. It leans into ultra-high detail and a polished, camera-like look that holds up under scrutiny.
If your workflow depends on revising and perfecting realism through targeted changes, Seedream 4.5 stands out thanks to image-to-image editing and flexible iteration. Since both cost 16 credits per image, the better value depends on whether you optimize for peak single-shot realism (Flux Ultra 1.1) or realistic iteration and refinement (Seedream 4.5).
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