Flux Ultra 1.1 vs GPT-Image 1.5
Buildings, facades, and architectural visualization — see how these models compare with real AI-generated outputs.
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Choosing the right image model for Architecture & Exterior work often comes down to two things: how convincingly it renders real-world building details (materials, joints, glazing, shadows) and how reliably it follows your brief (style, camera angle, massing, context).
Below is a practical comparison of Flux Ultra 1.1 and GPT-Image 1.5 inside Influencer Studio, focused on exterior architectural visualization—facades, streetscapes, hero renders, and design variations—along with a clear look at credit costs.
Architecture & Exterior — Side-by-Side Results
Prompt
"A candid phone-camera shot of a woman in her mid‑20s with shoulder-length dark hair, wearing an oversized beige hoodie, black leggings, and white sneakers, holding an iced coffee and glancing near the camera like she’s filming an Instagram story. She’s standing on a city sidewalk at golden hour in front of a striking modern glass-and-concrete building exterior, captured from a low angle with strong leading lines and reflections drawing toward the entrance. Natural warm sunlight, slight handheld motion blur, authentic street background with a few pedestrians and parked bikes."
Feature Comparison
| Feature | Flux Ultra 1.1 | GPT-Image 1.5 |
|---|---|---|
| Provider | Black Forest Labs | OpenAI |
| Subcategories | text-to-image | text-to-image |
| 1080p / 2k Mode | Yes | Yes |
| 4k Mode | No | No |
| NSFW Rating | Strict | Strict |
| 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 | 8 credits |
Flux Ultra 1.1 Strengths
- Exceptional micro-detail for facade elements (mullions, cladding seams, stone grain) that reads well in close-up exterior shots
- Strong photorealistic lighting and reflections for glazing, metal, and polished surfaces in daylight and golden-hour scenes
- Premium-quality output that suits hero renders of buildings, storefronts, and residential exteriors without heavy post-processing
- Consistent realism in material texture and surface finish, helpful for high-end marketing visuals and architectural presentations
GPT-Image 1.5 Strengths
- Strong prompt adherence for architectural constraints (style, roof form, window rhythm, camera height, lens feel) and scene requirements
- Versatile output across concept-to-visualization workflows, from clean massing studies to detailed streetscapes
- Good handling of complex exterior scenes (landscaping, signage, street furniture, pedestrians) while maintaining a coherent composition
- Flexible quality tiers (low/medium/high) to match iteration speed vs. final-render fidelity
Verdict
Pick Flux Ultra 1.1 when your priority is premium photorealism and crisp exterior detail—especially for close-range facade studies, material-rich marketing images, and hero shots where texture, reflections, and lighting realism matter most. At 16 credits per image, it aligns well with “final output” or high-stakes deliverables.
Pick GPT-Image 1.5 when you need the model to follow architectural direction tightly (style, composition, constraints) and you want cost control across stages. Its 8/16/32 credit tiers make it practical for rapid exterior iterations at low cost, then scaling up to higher fidelity for client-ready visuals.
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