GPT Image 1.5 vs Grok Imagine
OpenAI vs xAI — two tech giants' image generators compared at the same price.
GPT Image 1.5 from OpenAI and Grok Imagine from xAI represent two different approaches to AI image generation. OpenAI's #1 ranked image model with exceptional prompt adherence, photorealism, and text rendering. On the other side, xAI's flagship image model with exceptional realism and artistic range.
Both models cost 15 credits per generation, so the decision comes down to capabilities rather than budget. GPT Image 1.5 excels at highest quality generation, text rendering, photorealism, while Grok Imagine is better suited for photorealism, artistic range, unusual aspect ratios.
Updated March 2026
Both cost 15 credits, so pick based on your needs. Go with GPT Image 1.5 for highest quality generation. Choose Grok Imagine if you need photorealism. Since they're the same price on Melies, try both and see which output style you prefer.
GPT Image 1.5 vs Grok Imagine: Visual Output
Both generated with the same prompt and seed 42. Click to view full size.
GPT Image 1.5
Grok ImagineGPT Image 1.5 vs Grok Imagine: How They Compare
| GPT Image 1.5 | Grok Imagine | |
|---|---|---|
| Provider | OpenAI | xAI |
| Released | Jan 2026 | Jul 2025 |
| Cost | 15 | 15 |
| Speed | Medium | Medium |
| Reference images | Up to 1 | Up to 3 |
| Editing |
GPT Image 1.5 vs Grok Imagine: Cost Comparison
Both models cost the same. Here's how credits add up at scale.
| Volume | GPT Image 1.5 | Grok Imagine |
|---|---|---|
| 10 images | 150 | 150 |
| 50 images | 750 | 750 |
| 100 images | 1,500 | 1,500 |
Strengths & Weaknesses
GPT Image 1.5
- + Highest quality generation
- + More resolution options
- + #1 on all major image leaderboards
- + Transparent background support
- + Quality control (low/medium/high)
- - Higher price point relative to speed tier
Grok Imagine
- + Photorealism
- + Supports 3 reference images
- + 13 aspect ratio options (most of any model)
- + webp output support
- + Also has text-to-video capability
- - Higher price point relative to speed tier
GPT Image 1.5 vs Grok Imagine: Which to Pick?
On a tight budget
At 15 credits per image, GPT Image 1.5 gives you more generations for your plan. Good enough quality for most everyday use.
Character or style consistency
Grok Imagine supports 3 reference images to keep subjects, styles, and characters consistent across generations.
GPT Image 1.5 vs Grok Imagine: FAQ
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