GPT Image 1.5 (High) vs Stable Diffusion XL

Compare GPT Image 1.5 (High) by OpenAI against Stable Diffusion XL by Stability AI, tested across 17 shared challenges. Updated April 2026.

Which is better, GPT Image 1.5 (High) or Stable Diffusion XL?

GPT Image 1.5 (High) and Stable Diffusion XL are both competitive models. Compare their real outputs side by side below.

Key Differences Between GPT Image 1.5 (High) and Stable Diffusion XL

GPT Image 1.5 (High) is made by openai while Stable Diffusion XL is from stability.

Our Verdict
GPT Image 1.5 (High)
GPT Image 1.5 (High)
Stable Diffusion XL
Stable Diffusion XLRunner-up

No community votes yet. On paper, GPT Image 1.5 (High) has the edge — newer, major provider backing.

Too close to call
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Ask them anything yourself

GPT Image 1.5 (High)Stable Diffusion XL

279 AI models invented the same fake scientist.

We read every word. 250 models. 2.14 million words. This is what we found.

AI Hallucination Index 2026
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