Flux Ultra 1.1 vs GPT-Image 1.5
Eye-catching and expressive thumbnail imagery — see how these models compare with real AI-generated outputs.
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Choosing the right image model for YouTube thumbnails comes down to one thing: can it create an instantly readable, emotionally clear image that pops at small sizes? Both Flux Ultra 1.1 and GPT-Image 1.5 are strong options in Influencer Studio for text-to-image thumbnail creation, but they excel in different ways.
Flux Ultra 1.1 leans into premium photorealism and ultra-fine detail for high-impact hero images. GPT-Image 1.5 emphasizes prompt adherence and versatility—useful when you need the thumbnail to match a very specific concept, layout, or set of visual instructions.
YouTube Thumbnail — Side-by-Side Results
Prompt
"Close-up phone-camera shot of a 20s woman with shoulder-length dark brown hair in a messy bun, wearing a bright teal hoodie and simple gold hoops, making an exaggerated wide-eyed “WAIT—WHAT?!” face while holding an iced latte inches from the lens and glancing right at the camera. Candid everyday moment in a busy local café with bold colorful menu boards and people softly blurred behind her, dynamic off-center framing like a TikTok thumbnail, high contrast with natural window light spilling across her face. Clickbait YouTube thumbnail energy, vibrant colors, slightly imperfect handheld selfie look (not editorial), sharp focus on face and drink."
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
- Premium photorealistic look that helps thumbnails feel high-production and “real”
- Exceptional micro-detail (skin, textures, materials) for crisp hero subjects and product-style shots
- Strong visual punch for dramatic lighting, cinematic framing, and high-contrast scenes
- Consistent premium quality per image (16 credits) for predictable budgeting on a per-thumbnail basis
GPT-Image 1.5 Strengths
- Strong prompt adherence—useful for precise thumbnail concepts, props, poses, and scene requirements
- Versatile output across styles (from clean studio looks to complex scenes) when you need variety for A/B tests
- Good handling of detailed scenes where multiple elements must remain recognizable at once
- Flexible pricing tiers (8/16/32 credits) to match draft thumbnails vs final “hero” renders
Verdict
Pick Flux Ultra 1.1 when your thumbnail strategy relies on premium photorealism—close-up faces, cinematic lighting, and ultra-crisp subjects that look expensive and instantly clickable. At 16 credits per image, it’s a straightforward choice for final-quality renders.
Pick GPT-Image 1.5 when accuracy to your concept matters most—specific compositions, multiple required objects, or repeatable variations for testing. Its tiered pricing also makes it practical for quickly generating low-cost drafts (8 credits) before committing to higher-fidelity outputs.
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