Flux Ultra 1.1 vs GPT-Image 1.5
Hyperrealistic renders indistinguishable from photographs — see how these models compare with real AI-generated outputs.
Full comparisonCompare Models (select 4)
Photorealistic image generation on Influencer Studio is about more than sharpness—it’s about camera-believable lighting, natural skin texture, realistic materials, and scenes that hold up under close inspection. Flux Ultra 1.1 and GPT-Image 1.5 both target high-fidelity results, but they approach “photo-like” output with different strengths.
Below is a focused comparison for hyperrealistic renders that can pass as real photographs, including when each model shines, how reliably it follows prompts, and how pricing impacts day-to-day production.
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 photorealistic, 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. |
| 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 | 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
Photorealistic
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.
Photorealistic — Side-by-Side Results
Prompt
"Hyperrealistic DSLR-quality photo of a 24–30-year-old woman with shoulder-length wavy dark brown hair and minimal makeup, wearing a cozy oversized oatmeal sweater and black leggings, holding her phone slightly above eye level for a casual selfie while glancing at the screen with a soft half-smile. She’s in a small neighborhood café by a window, one hand around a takeaway coffee cup on a wooden table with a laptop and messy earbuds, natural morning light casting realistic shadows and subtle skin texture/imperfections. Candid Instagram-story vibe, slight motion blur in the background, true-to-life color and accurate indoor/outdoor light mix."
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 photoreal close-ups (skin texture, fabric weave, fine hair, subtle surface imperfections)
- Strong realism in lighting and materials, helping images read like real camera captures
- Premium, polished output that often needs fewer enhancement passes for high-end photoreal work
- Consistent “ultra-high detail” look suited to hero images and zoom-in scrutiny
GPT-Image 1.5 Strengths
- Strong prompt adherence for photoreal briefs with specific subject, wardrobe, props, and scene requirements
- Flexible fidelity settings (low/medium/high) to balance cost vs. realism depending on deliverable needs
- Reliable composition control for complex, detailed scenes where accuracy matters as much as realism
- High-fidelity output that performs well across varied photoreal styles (studio, lifestyle, environmental)
Verdict
If your top priority is maximum photoreal polish and ultra-fine detail that holds up under close inspection, Flux Ultra 1.1 is the more consistently “premium” choice—especially for hero shots, product-like clarity, and hyperreal portraits.
If you need photorealism and tight prompt accuracy with the option to scale quality to budget, GPT-Image 1.5 is the more versatile everyday workhorse. Use medium for most photoreal deliverables, and reserve high for the most demanding, camera-believable shots.
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