Flux Ultra 1.1 vs GPT-Image 1.5
Versatile and licensable stock photo style — see how these models compare with real AI-generated outputs.
Full comparisonCompare Models (select 4)
Stock photography demands more than “pretty images.” To feel licensable and broadly usable, outputs should read as authentic, commercially neutral, and adaptable across campaigns—clean compositions, believable lighting, natural proportions, and minimal distracting artifacts.
This comparison looks at how Flux Ultra 1.1 and GPT-Image 1.5 perform inside Influencer Studio for stock-photo-style generation, focusing on photorealism, prompt adherence, scene reliability, and cost efficiency for everyday creative 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 stock photography, 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. |
| Stock Photography specifically | Flux Ultra 1.1 | Flux Ultra 1.1 scores higher on realism, which matters most for stock photography. |
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
Stock Photography
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.
Stock Photography — Side-by-Side Results
Prompt
"A 20s woman with shoulder-length wavy dark hair in a casual oversized hoodie and leggings holds her phone slightly above eye level, looking near the camera with a relaxed half-smile while sitting by a café window with a latte and laptop on the table. Bright natural window light, clean stock-photo composition, candid Instagram-story vibe with subtle background blur and everyday street scene outside."
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 photorealism and micro-detail that supports premium, “shot-on-camera” stock aesthetics
- Strong texture and material rendering (skin, fabric, surfaces) for close-ups and product-adjacent lifestyle scenes
- High perceived production value for hero images and high-end commercial concepts
- Consistent premium look that elevates catalogs, landing pages, and editorial-style stock sets
GPT-Image 1.5 Strengths
- Stronger prompt adherence for stock-specific constraints (composition, setting, wardrobe, props, and mood)
- Versatile output across common stock categories (business, wellness, travel, food, education) with reliable scene coverage
- Flexible quality tiers (8/16/32 credits) to match budget and usage—drafts to final deliverables
- Good at detailed multi-subject scenes where clarity and instruction-following matter (e.g., workplace collaboration, classroom, retail)
Verdict
Choose Flux Ultra 1.1 when your priority is premium photorealism—high-end lifestyle, product-adjacent visuals, and hero stock images where textures, lighting nuance, and overall “camera-like” finish matter most. At 16 credits per image, it’s straightforward to budget for consistent premium outputs.
Choose GPT-Image 1.5 when you need tighter control over stock-friendly requirements (clear subject, clean background options, specific demographics/wardrobe, or precise scene direction) and you want pricing flexibility. Its low/medium/high tiers (8/16/32 credits) make it practical for iterating quickly on concepts and then scaling quality for final selections.
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