Which should you pick?
Seedream 4.0 and Flux 2 Klein 9B Base start at the same 2 credits for a complete generation.
Seedream 4.0 holds the stronger leaderboard position (#16 in text to image against #29 in edit image). Those are two different leaderboards unless the category matches — Versely ranks each capability separately.
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
Seedream 4.0
2 credits
It bills a flat rate per generation.
- Price2 credits
Flux 2 Klein 9B Base
2 credits
It bills per megapixel of output.
- Price2 credits
All figures are Versely credits. Your plan's credit allowance is on the pricing page.
Spec comparison
| Spec | Seedream 4.0 | Flux 2 Klein 9B Base |
|---|---|---|
| Provider | ByteDance | Flux |
| Cost per job | 2 credits | 2 credits |
| Billing | a flat rate per generation | per megapixel of output |
| Max resolution | 4K | — |
| Aspect ratios | 21:9, 16:9, 3:2, 4:3, 1:1, 3:4, 2:3, 9:16, auto | 1:1, 4:3, 3:4, 16:9, 9:16 |
| Durations | — | — |
| Frame rates | — | — |
| Qualities | 1K, 2K, 4K | — |
| Requires starting image | No | No |
| Accepts video input | No | No |
| Reference images | — | Up to 4 |
| Leaderboard | #16 in text to image | #29 in edit image |
| Released | Sep 9, 2025 | Jan 15, 2026 |
What each one does that the other doesn't
Only Seedream 4.0
high resolution, 4k, bytedance
Only Flux 2 Klein 9B Base
Nothing the other one doesn't also list.
Both list: text to image, 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.
Seedream 4.0
- Text to image#16
- Edit image#24
Flux 2 Klein 9B Base
- Edit image#29
- Text to image#58
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.
Full Flux 2 Klein 9B Base spec sheet →
Text-to-image generation with FLUX.2 [klein] 9B Base from Black Forest Labs. Enhanced realism, crisper text generation, and native editing capabilities.
Frequently asked questions
Which is cheaper, Seedream 4.0 or Flux 2 Klein 9B Base?+
Neither — both start at 2 credits for a complete generation on Versely.
What can Seedream 4.0 do that Flux 2 Klein 9B Base can't, or vice versa?+
Only Seedream 4.0 lists high resolution, 4k, bytedance. Both list text to image, text to image.
How do Seedream 4.0 and Flux 2 Klein 9B Base bill?+
Seedream 4.0 bills a flat rate per generation. Flux 2 Klein 9B Base bills per megapixel of output. Both are charged in Versely credits.
Which ranks higher, Seedream 4.0 or Flux 2 Klein 9B Base?+
Seedream 4.0 sits at #16 in text to image and Flux 2 Klein 9B Base at #29 in edit image on Versely's live model rankings. Versely ranks each capability on its own leaderboard, so those positions are only a direct comparison when the category is the same.
Try both inside Versely
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