Seedream 4.5 is ByteDance Seed's image generation model β released as model ID seedream-4-5-251128 on the BytePlus ModelArk API. Seedream 4.5 outputs at 2K or 4K, accepts up to 14 reference images per request, and renders posters, logos, and small text with designer-level typography.
ByteDance's reference-fidelity image model with 4K output and dense text
Seedream 4.5 is the image generation model from ByteDance's Seed team, available on BytePlus ModelArk as seedream-4-5-251128. Three things separate Seedream 4.5 from earlier ByteDance models: it accurately identifies main subjects across multi-image edits, strictly preserves the reference image's facial features, lighting, and color tone, and enhances typography and dense text rendering. A Seedream 4.5 request accepts up to 14 reference images plus the generated output (capped at 15 per call), outputs JPEG at 2K or 4K, and runs at up to 500 images per minute on the official endpoint.
A single Seedream 4.5 request accepts reference images plus generated output up to 15 in total β up to 14 references for one new image.
Seedream 4.5 generates at 2K and 4K resolution, JPEG output, suitable for posters, ads, and print-quality creative work.
Seedream 4.5 preserves the reference image's facial features, lighting, color tone, and details β the basis of identity-stable multi-shot edits.
Posters, brand visuals, and small text β Seedream 4.5 lays out clear, readable typography with dense-text rendering that holds at 4K.
Across multiple input images, Seedream 4.5 accurately identifies the target subject and keeps it consistent in the generated frame.
Official BytePlus rate cap is 500 images/minute for Seedream 4.5 β fast enough for batch product shots and campaign variants.
Seedream 4.5 holds the reference image's face, lighting, and color across edits.
Earlier image models drifted on faces and re-lit scenes on every small change. Seedream 4.5 treats the reference's facial features, lighting, and color tone as constraints β local edits land without rebuilding the frame.
A single Seedream 4.5 request accepts up to 14 reference images plus the generated output.
Per the official ModelArk docs, a Seedream 4.5 call enforces input references + generated images β€ 15. One generated frame leaves room for up to 14 references β outfit, pose, lighting, product, mood β folded into a single render.
Seedream 4.5 accurately identifies the target subject across multiple input images.
Drop in two or three inputs β character, outfit, environment β and Seedream 4.5 picks out the subject the prompt names. Replace clothing, swap backgrounds, blend scenes; the subject stays recognizable instead of morphing between renders.
Seedream 4.5 lays out designer-level composition and renders small, readable text.
Posters stress-test typography β text has to stay legible next to the imagery. Seedream 4.5 sharpened typography and dense text rendering, so letters and small captions render cleanly at 4K for print campaigns and social ads.
Seedream 4.5 outputs JPEG at 2K and 4K with an official rate cap of 500 images/minute.
BytePlus ModelArk lists Seedream 4.5 with 2K and 4K, JPEG output, and 500 max images per minute. That throughput makes Seedream 4.5 viable for batch product shots, campaign variants, and ad rotations.
Eight outputs β each caption is a reusable Seedream 4.5 prompt
Verified specs from each vendor's official page β no third-party numbers.
| Capability | Seedream 4.5 | Nano Banana Pro | Imagen 4 | Seedream 5.0 Lite |
|---|---|---|---|---|
| Vendor | ByteDance Seed (BytePlus) | Google DeepMind (Gemini 3 Pro Image) | Google DeepMind | ByteDance Seed (BytePlus) |
| Output resolution | 2K, 4K (JPEG) | Studio-quality (per Gemini 3) | Up to 2K | 2K, 3K (PNG, JPEG) |
| Reference / input images | Up to 14 references (β€15 with output) | Multi-image input + edit | Text-to-image leading focus | Up to 14 references (β€15 with output) |
| Multi-image editing | Subject lock across inputs | Edit + localize text in image | Not stated on landing | Multi-image fusion + series |
| Text rendering | Typography + dense text + small text | Sharp, legible posters and handwriting | Improved spelling and typography | Letters, numbers, time, colors |
| Pricing per image | $0.04 (BytePlus) | Per-token (Gemini API) | Not stated on landing | $0.035 (BytePlus) |
| Release / model ID | seedream-4-5-251128 | Gemini 3 Pro Image | Imagen 4 (Imagen family) | seedream-5-0-260128 |
Four habits the BytePlus docs reward and the model expects
Drop in up to 14 reference images β character, outfit, lighting, environment, brand mark. Seedream 4.5 reads them all and still leaves room for one generated output.
In a multi-image edit, tell Seedream 4.5 which input is the subject ('the woman in image 2'). Subject lock works best when the prompt is unambiguous.
Seedream 4.5 outputs JPEG at 2K or 4K. Set the size before rendering β for posters and billboards, 4K saves an upscale pass downstream.
If 90% is right, ask Seedream 4.5 to edit the 10% β keep the reference, change one element. Cheaper than a fresh generation and more identity-stable.
Each model has its own strengths
What users ask before their first Seedream 4.5 render
Free. No credit card. Up to 14 reference images, 4K JPEG output, dense-text rendering. Try Seedream 4.5 on ZorqAI above.
