Which should you pick?
Seedream 4.5 and Flux 2 Flex start at the same 4 credits for a complete generation.
Flux 2 Flex holds the stronger leaderboard position (#24 in text to image against #27 in edit image). Those are two different leaderboards unless the category matches — Versely ranks each capability separately.
Seedream 4.5 supports more aspect ratios (8: 1:1, 2:3, 3:2, 4:3, 3:4, 16:9, 9:16, 21:9), giving it more format flexibility.
What a job costs
Seedream 4.5
4 credits
It bills a flat rate per generation.
- Price4 credits
Flux 2 Flex
4 credits
It bills per megapixel of output.
- Price4 credits
All figures are Versely credits. Your plan's credit allowance is on the pricing page.
Spec comparison
| Spec | Seedream 4.5 | Flux 2 Flex |
|---|---|---|
| Provider | ByteDance | Flux |
| Cost per job | 4 credits | 4 credits |
| Billing | a flat rate per generation | per megapixel of output |
| Max resolution | 4K | — |
| Aspect ratios | 1:1, 2:3, 3:2, 4:3, 3:4, 16:9, 9:16, 21:9 | 16:9, 9:16, 1:1, 4:3, 3:4 |
| Durations | — | — |
| Frame rates | — | — |
| Qualities | SD, HD, 4K | — |
| Requires starting image | No | No |
| Accepts video input | No | No |
| Reference images | Up to 10 | — |
| Leaderboard | #27 in edit image | #24 in text to image |
| Released | Dec 4, 2025 | Nov 25, 2025 |
What each one does that the other doesn't
Only Seedream 4.5
edit image, image to image, advanced, high quality, creative
Only Flux 2 Flex
image editing, flexible
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.
Seedream 4.5
- Edit image#27
- Text to image#37
Flux 2 Flex
- Text to image#24
- Edit image#41
Full Seedream 4.5 spec sheet →
ByteDance's Seedream 4.5 all-round image model — generation, editing and image-to-image in one endpoint, with the strong text rendering and prompt comprehension the Seedream line is known for.
Full Flux 2 Flex spec sheet →
Flexible image generation and editing model from the Flux 2 family with versatile creative controls
More comparisons
Frequently asked questions
Which is cheaper, Seedream 4.5 or Flux 2 Flex?+
Neither — both start at 4 credits for a complete generation on Versely.
What can Seedream 4.5 do that Flux 2 Flex can't, or vice versa?+
Only Seedream 4.5 lists edit image, image to image, advanced, high quality, creative. Only Flux 2 Flex lists image editing, flexible. Both list text to image.
How do Seedream 4.5 and Flux 2 Flex bill?+
Seedream 4.5 bills a flat rate per generation. Flux 2 Flex bills per megapixel of output. Both are charged in Versely credits.
Which ranks higher, Seedream 4.5 or Flux 2 Flex?+
Seedream 4.5 sits at #27 in edit image and Flux 2 Flex at #24 in text to 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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