Seedream 4.5 vs Seedream 5 Flash: technical and visual comparison
This compares two models that are available in the current Mixer AI catalog. The table below is built from current product controls, while the visual section shows what to inspect with the same inputs and prompt instead of inventing one universal winner.
Seedream 4.5: Product scenes, characters and reference-based edits at 2K or 4K.
Seedream 5 Flash: Generate and edit images at 1K/2K with up to 10 input photos and eight aspect ratios.
Start with the specification table: it reflects current modes, input media, duration, resolution, aspect ratios and a normalized price where a fair comparison is possible.
Specifications
Spec
Seedream 4.5
Seedream 5 Flash
Generation modes
from text / photo editing
from text / photo editing
Input photos
up to 14
up to 10
Resolutions
2K / 4K
1K / 2K
Aspect ratios
9:16 / 16:9 / 1:1 / 4:3 / 3:4 / 3:2 / 2:3 / 21:9
9:16 / 16:9 / 1:1 / 4:3 / 3:4 / 2:3 / 3:2 / 21:9
Prompt limit
3,000 characters
5,000 characters
Price, 1 image · 2K
7 coins
4 coins
What to compare visually
For a fair A/B test, use the same prompt, aspect ratio and references. Inspect more than overall style: object preservation, geometry, faces and hands, fine detail, text in the frame and unintended changes during editing.
What to inspect with Seedream 4.5
Product scenes, characters and reference-based edits at 2K or 4K.
Text or up to 14 input photographs.
2K or 4K, 8 aspect ratios and 1, 2 or 4 results.
References supply material for a composition, not a guarantee of unchanged pixels.
Fine lettering, fingers and intersecting objects may need another edit.
What to inspect with Seedream 5 Flash
Generate and edit images at 1K/2K with up to 10 input photos and eight aspect ratios.
Text-only generation, or editing with 1–10 input photos.
1K and 2K; ratios 1:1, 4:3, 3:4, 16:9, 9:16, 2:3, 3:2, and 21:9.
This integration does not expose a separate 4K option for this version.
References do not guarantee exact text, logos, or fine geometry, so inspect those details in the final image.
How to run a fair comparison
Lock one prompt, aspect ratio and a duration or resolution that both models actually support.
If input modes differ, compare the shared workflow first and test each model's extra controls separately.
Run more than one attempt: a single output reflects one seed, not the model's overall consistency.
Score prompt adherence, visual artifacts, reference preservation and the cost of the setting you would really use separately.
How should I compare Seedream 4.5 and Seedream 5 Flash fairly?
Use a workflow both models share, keep inputs and prompt identical, then run several generations. Compare prompt adherence, visual consistency and the price of the setting you need as separate dimensions.
Are both models available in Mixer AI?
Yes. This page is generated only for models in the current public Mixer AI catalog; if a model leaves the catalog, the automated comparison must stop passing validation.
Which model is better?
There is no universal answer. First eliminate a model that cannot accept the input, duration, resolution or format you need, then compare outputs on your own scene. The table highlights only measurable advantages in individual specifications.
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