Flux Ultra 1.1 vs Grok Imagine
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 how reliably it renders facades, materials, glazing, and perspective—while keeping lines straight and details consistent. Flux Ultra 1.1 and Grok Imagine both target high-quality architectural visualization, but they prioritize different strengths.
This comparison focuses on exterior buildings and facades: photorealistic street-level renders, hero shots for real estate, conceptual massing, and design variations. Below is how each model performs for architectural clarity, material realism, iteration workflows, and cost per image on Influencer Studio.
Architecture & Exterior — Side-by-Side Results
Prompt
"Candid phone-camera shot of a woman in her mid-20s with shoulder-length dark hair, wearing a beige trench coat, black leggings, and white sneakers, standing on a city sidewalk and glancing near the camera while she holds an iced coffee and points up at a striking modern glass-and-concrete building behind her. The building exterior is the focus: dramatic upward angle from street level, strong leading lines from the facade and sidewalk, golden hour sunlight reflecting in the windows with a warm sky. Natural street lighting, slightly imperfect handheld framing like an Instagram Story travel vlog moment."
Feature Comparison
| Feature | Flux Ultra 1.1 | Grok Imagine |
|---|---|---|
| Provider | Black Forest Labs | xAI |
| 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 | 4 credits |
Flux Ultra 1.1 Strengths
- Exceptional micro-detail for facade elements (mullions, cladding seams, brick texture, signage) in premium, photorealistic exterior renders
- Strong realism in materials and lighting (glass reflections, metal specular highlights, stone/wood grain) for hero-shot architecture visuals
- High perceived sharpness and finish suitable for client-facing exterior presentations and marketing imagery
- Best fit when you need a “final render” look with minimal post-processing—at a premium per-image cost
Grok Imagine Strengths
- Cost-efficient iteration for architectural concepts and exterior mood exploration (4 credits per image) without sacrificing high detail
- Image-to-image support enables faster facade redesigns, style shifts, and controlled variations from an existing building render
- Strong creative composition options for exterior scenes (streetscapes, landscaping, time-of-day changes) when exploring multiple directions
- Practical choice for early-stage massing studies and rapid A/B testing of materials, colorways, and architectural styles
Verdict
Flux Ultra 1.1 is the better pick for premium, photorealistic exterior “hero” renders where facade detail, material finish, and overall polish are the priority—and the higher per-image cost is justified by the output quality.
Grok Imagine is the value and workflow winner for architectural teams and creators who need lots of iterations, want to drive changes via image-to-image, or are exploring multiple exterior concepts quickly. For many Architecture & Exterior pipelines, it pairs well as the ideation/variation engine, with Flux Ultra 1.1 reserved for final selects.
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