GPT-Image 1.5 vs Seedream v4.5

We ran both models through 10 prompts and measured the results. Below you'll find the actual outputs, generation times, and our notes on each.

Quick Verdict
10 prompts tested Jan 2026
GPT-Image 1.5 Better photorealism
Seedream v4.5 Faster generation, Better text rendering
Winner Score 6-4 (GPT-Image)
Avg Speed GPT-Image: 40.0s
Avg Speed Seedream: 15.9s
Best at Text Seedream
Best at Photos GPT-Image

Specs

What each model can do.

Feature GPT-Image 1.5 Seedream v4.5
Text-to-Image Yes Yes
Image-to-Image Yes Yes
Max Resolution 1K (1024×1024) 4K (4096×4096)
Average Speed 40.0s 15.9s
Cost via fal.ai
$0.009–$0.20
low–high quality
$0.04
per image
Architecture Multimodal LLM Diffusion
Providers fal.ai, OpenAI fal.ai

Use both models in VM Studio

Install VM Studio and compare GPT-Image 1.5 vs Seedream v4.5 on your own prompts.

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