Flux Ultra 1.1 vs GPT-Image 1.5
Buildings, facades, and architectural visualization — see how these models compare with real AI-generated outputs.
Full comparisonCompare Models (select 4)
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.
Which Model Should You Choose?
Short answer: Flux Ultra 1.1 is better for premium photoreal detail, while GPT-Image 1.5 is better for accurate prompt adherence. If you are creating architecture & exterior, start with GPT-Image 1.5 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 | GPT-Image 1.5 | GPT-Image 1.5 costs 8 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 | GPT-Image 1.5 | GPT-Image 1.5 renders labels and typography more cleanly. |
| Editing and reference-driven iteration | GPT-Image 1.5 | GPT-Image 1.5 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. |
| Architecture & Exterior specifically | Flux Ultra 1.1 | Flux Ultra 1.1 scores higher on realism, which matters most for architecture & exterior. |
How They Compare, Criterion by Criterion
| Criteria | Flux Ultra 1.1 | GPT-Image 1.5 | Winner |
|---|---|---|---|
| Realism | ●●●●● | ●●●●○ | Flux Ultra 1.1 |
| Text accuracy | ●●○○○ | ●●●●○ | GPT-Image 1.5 |
| Editing flexibility | ●●○○○ | ●●●○○ | GPT-Image 1.5 |
| Cost efficiency | ●●●○○ | ●●●○○ | Tie |
| Final polish | ●●●●● | ●●●●○ | Flux Ultra 1.1 |
| Consistency | ●●●●○ | ●●●●○ | Tie |
| Best first test | ●●●○○ | ●●●○○ | GPT-Image 1.5 |
How We Compare These Models
Models compared
Flux Ultra 1.1 vs GPT-Image 1.5
Use case
Architecture & Exterior
Flux Ultra 1.1 — best for
premium photoreal detail
GPT-Image 1.5 — best for
accurate prompt adherence
Flux Ultra 1.1 — avoid if
You need editing, text accuracy, or low-cost iteration
GPT-Image 1.5 — avoid if
You need the lowest cost or advanced editing flexibility
Credits per image (Flux Ultra 1.1)
16 credits
Credits per image (GPT-Image 1.5)
8 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
GPT-Image 1.5 renders any labels, overlays, or typography more cleanly.
Commercial usability
Flux Ultra 1.1 is closer to a ready-to-use image asset; GPT-Image 1.5 is better for concepting.
Recommended next step
Use GPT-Image 1.5 for first-pass variants, then Flux Ultra 1.1 for final polish.
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.
Frequently Asked Questions
More Comparisons by Category
Try Both Models Free
Sign up and get credits to test Flux Ultra 1.1, GPT-Image 1.5, and all our other AI models for architecture & exterior.
Join Influencer Studio Today
Start creating amazing AI-generated content for your brand