Which should you pick?
GPT Image 1.5 and Seedream 4.0 start at the same 2 credits for a complete generation.
Seedream 4.0 supports more aspect ratios (9: 21:9, 16:9, 3:2, 4:3, 1:1, 3:4, 2:3, 9:16, auto), giving it more format flexibility.
What a job costs
GPT Image 1.5
2 credits
It bills a flat rate per generation.
- Price2 credits
Seedream 4.0
2 credits
It bills a flat rate per generation.
- Price2 credits
All figures are Versely credits. Your plan's credit allowance is on the pricing page.
Spec comparison
| Spec | GPT Image 1.5 | Seedream 4.0 |
|---|---|---|
| Provider | OpenAI | ByteDance |
| Cost per job | 2 credits | 2 credits |
| Billing | a flat rate per generation | a flat rate per generation |
| Max resolution | 4K | 4K |
| Aspect ratios | 1:1, 2:3, 3:2 | 21:9, 16:9, 3:2, 4:3, 1:1, 3:4, 2:3, 9:16, auto |
| Durations | — | — |
| Frame rates | — | — |
| Qualities | SD, HD, 4K | 1K, 2K, 4K |
| Requires starting image | No | No |
| Accepts video input | No | No |
| Reference images | Up to 16 | — |
| Leaderboard | #9 in text to image | Unranked |
| Released | Dec 16, 2025 | Sep 9, 2025 |
What each one does that the other doesn't
Only GPT Image 1.5
image to image, edit image, gpt, ai powered, versatile
Only Seedream 4.0
high resolution, 4k, bytedance
Both list: text to image.
Leaderboard positions
Versely ranks each capability on its own leaderboard, so a position is only comparable between two models within the same row.
GPT Image 1.5
- Text to image#9
- Edit image#12
Seedream 4.0
Not on a Versely leaderboard yet.
Full GPT Image 1.5 spec sheet →
OpenAI's GPT Image 1.5 — conversational prompt understanding across text-to-image, image-to-image and edits. Strong at following long, specific instructions and rendering legible in-image text.
Full Seedream 4.0 spec sheet →
ByteDance Seedream 4.0 text-to-image. High-resolution generation (up to 4K) with multi-image output and built-in prompt enhancement.
More comparisons
Frequently asked questions
Which is cheaper, GPT Image 1.5 or Seedream 4.0?+
Neither — both start at 2 credits for a complete generation on Versely.
What can GPT Image 1.5 do that Seedream 4.0 can't, or vice versa?+
Only GPT Image 1.5 lists image to image, edit image, gpt, ai powered, versatile. Only Seedream 4.0 lists high resolution, 4k, bytedance. Both list text to image.
How do GPT Image 1.5 and Seedream 4.0 bill?+
GPT Image 1.5 bills a flat rate per generation. Seedream 4.0 bills a flat rate per generation. Both are charged in Versely credits.
Try both inside Versely
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