Flux Pro Ultra vs Grok Imagine
Black Forest Labs' premium model vs xAI's photorealistic generator — which premium pick?
Grok Imagine is no longer offered on Melies. Flux Pro Ultra is available today. The specs below are kept for reference.
Flux Pro Ultra from Black Forest Labs and Grok Imagine from xAI represent two different approaches to AI image generation. Ultra-high resolution (up to 2K) with enhanced photorealism and detail. On the other side, xAI's flagship image model with exceptional realism and artistic range.
At 15 credits, Grok Imagine costs 5 credits less than Flux Pro Ultra (20 credits). Grok Imagine is no longer offered on Melies. Flux Pro Ultra is, along with the other current image models listed on the pricing page.
Updated November 2026
Grok Imagine is no longer offered on Melies, so Flux Pro Ultra is the one you can use here. At 20 credits, it is a fit for large-format prints. For other options, compare the current image models and their credit costs on the pricing page.
Flux Pro Ultra vs Grok Imagine: Visual Output
Both generated with the same prompt and seed 42. Click to view full size.
Flux Pro Ultra
Grok ImagineFlux Pro Ultra vs Grok Imagine: How They Compare
| Flux Pro Ultra | Grok Imagine | |
|---|---|---|
| Provider | Black Forest Labs | xAI |
| Released | Nov 2024 | Jul 2025 |
| Cost | 20 | 15 |
| Speed | Slower | Medium |
| Reference images | Up to 1 | Up to 3 |
| Editing | ||
| WebP output |
Flux Pro Ultra vs Grok Imagine: Cost Comparison
Grok Imagine is 25% cheaper than Flux Pro Ultra. Here's how credits add up at scale.
| Volume | Flux Pro Ultra | Grok Imagine |
|---|---|---|
| 10 images | 200 | 150 |
| 50 images | 1,000 | 750 |
| 100 images | 2,000 | 1,500 |
Strengths & Weaknesses
Flux Pro Ultra
- + Large-format prints
- + More resolution options
- + Raw mode for unprocessed output
- + Reference image with strength control
- + Prompt enhancement
- - More expensive (20 vs 15 credits)
- - Slower generation
- - No built-in editing
Grok Imagine
- + More affordable (15 vs 20 credits)
- + Photorealism
- + Supports 3 reference images
- + Built-in image editing
- + WebP output for smaller file sizes
- - Higher price point relative to speed tier
Flux Pro Ultra vs Grok Imagine: Which to Pick?
Maximum quality matters
Flux Pro Ultra is worth the extra credits when the output needs to be perfect — portfolio pieces, client work, or final deliverables.
Flux Pro Ultra vs Grok Imagine: FAQ
Practical answers before you start creating.
Try Flux Pro Ultra on Melies
Compare Flux Pro Ultra with the other image models on Melies side by side. Switch models with one click, same credits.
Start Generating Images
