Flux Ultra 1.1 vs Seedream 4.5
Original characters, game characters, and mascots — see how these models compare with real AI-generated outputs.
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Flux Ultra 1.1 and Seedream 4.5 are both strong options in Influencer Studio for character design, especially when you need original characters, game-style heroes, or mascot concepts that look polished and production-ready. They’re priced the same (16 credits per image), so the decision usually comes down to the kind of outputs and workflow you value most.
In general, Flux Ultra 1.1 leans toward maximum detail and photoreal polish for character renders, while Seedream 4.5 is built for versatility and iteration—particularly when you want to refine a character using image-to-image editing, explore multiple styles, or adjust an existing design without restarting.
Character Design — Side-by-Side Results
Prompt
"Candid phone-camera selfie of a 20s influencer character design with a distinctive silhouette: short choppy teal bob with blunt bangs, one eyebrow slit, warm freckles, and a tiny star-shaped nose ring; oversized cropped hoodie layered over a fitted ribbed tank, asymmetrical pleated skirt over bike shorts, chunky sneakers, and a crossbody bag covered in enamel pins. She’s half-turned in a cozy neighborhood café by the window, holding an iced latte mid-sip and looking near the camera like she’s filming an Instagram story, relaxed shoulders and slightly messy “just walked in” vibe. Natural window light, casual handheld framing with a subtle mirror reflection behind her, clean costume details and proportions like a game character concept sheet but still a real-life social post."
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 faces, skin, hair, fabric textures, and props—useful for close-up character portraits
- Photorealistic character renders that read well for cinematic game concepts and realistic mascots
- Premium “final render” feel that can reduce the need for additional polish when presenting character boards
- Strong clarity at high detail levels for accessories, armor, and layered costume design
Seedream 4.5 Strengths
- Image-to-image editing support for refining an existing character concept (outfit tweaks, silhouette changes, expression adjustments)
- Versatile style range for exploring mascot looks, stylized game characters, or more realistic directions from the same base idea
- High-resolution output suited to character sheets, turnarounds, and marketing-ready variations
- Efficient iteration workflow when you need consistent updates across multiple poses or themed variants
Verdict
If your priority is premium, photoreal character renders with standout texture and detail—especially for realistic game characters or high-end hero shots—Flux Ultra 1.1 is often the better fit.
If your workflow depends on iterating and editing (e.g., evolving a mascot across campaigns, refining a character silhouette, or generating controlled variations from a base design), Seedream 4.5 is typically the more practical choice. Since both cost 16 credits per image, choose based on whether you need a “final render” specialist (Flux Ultra 1.1) or an iteration-friendly all-rounder (Seedream 4.5).
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