Seedream 4.5 — AI Image Generator

Seedream 4.5 is a ByteDance AI image model in PicX Studio for text-to-image creation, image editing, and combining multiple visual references into one composition.

Use it for product concepts, campaign scenes, social graphics, styled product edits, visual moodboards, illustrations, and reference-led compositions.

Yes. Add one reference image to edit it, or up to 10 to combine products, people, places and styles. Tell the model what each image is for.

Start with a clear subject, then add the setting, framing, lighting, palette, and style. Refine one important choice per variation.

Yes. Choose 2K (about 4 megapixels) for 32 credits or 4K (about 16 megapixels, up to 4096 px on the long side) for 35 credits per image.

Your first image on PicX Studio is free after you sign up, no card needed, and you can use it on Seedream 4.5. After that each image costs 32 credits at 2K or 35 at 4K.

Yes. Upload an image and describe what to change and what to keep. It handles backgrounds, outfits, lighting, objects and full restyles without masks.

Seedream 4.5 has a seed setting. The same seed with the same prompt and references gives a similar image, which helps when you build a consistent set.

Seedream 5 Lite is cheaper and fast but has no seed control. Seedream 5 Pro is text-to-image only, with lettering in 14 languages. Seedream 4.5 is the one for multi-reference work, seed control and 4K at close to its 2K price.

Lead with the finished image: what it is for and what is in it. Then add setting, framing, light, palette and materials. Keep it in plain sentences, not a tag list. Seedream reads long prompts well, so a 60 to 100 word brief is fine, but every clause should describe something visible. If an element keeps disappearing, move it earlier in the prompt. For text in the image, put the exact words in quotes and say where they sit, for example "a headline across the top third". Change one thing between runs so you can see what each word does.

Seedream 4.5 accepts up to 10 images in one edit. The model does best when you tell it what each image is for. Write it out: "Use image 1 for the bottle, image 2 for the kitchen, image 3 for the lighting and color." References that disagree, such as two different faces for one person, pull the result in two directions, so drop the weaker one. For product work, a clean packshot on a plain background is the most reliable input. For people, a sharp front-facing photo holds identity better than a stylized one.

Attach one image and describe the change. Good edit prompts have two halves: what to change and what to keep. "Replace the grey wall with warm wood paneling, keep the person, pose and clothing the same" works better than "make it cozier". Edits work for backgrounds, outfits, lighting, weather, time of day and adding or removing objects. For a series, reuse the same seed with the same prompt and change only the instruction you care about, so the rest of the frame stays close.

PicX offers Seedream 4.5 at 2K for 32 credits and 4K for 35 credits per image. 2K targets about 4 megapixels, around 2048 by 2048 for a square. 4K targets about 16 megapixels with up to 4096 pixels on the long side. Aspect ratios are auto, 1:1, 4:3, 3:4, 3:2, 2:3, 16:9, 9:16 and 21:9. Because 4K is only 3 credits more, use it whenever the image might be cropped, printed or used as a large banner. Use 2K for quick tests.

Both edit from references and both handle text-to-image. Seedream 4.5 takes up to 10 references and reaches 4K for 35 credits, which makes it the lower-cost route to large images of the two. Nano Banana 2 is quick and strong at following edit instructions and costs 35 credits at 1K and 105 at 4K. If your brief is many references and a big file, start with Seedream 4.5. If it is fast conversational edits on one image, try Nano Banana 2. On PicX you can run the same prompt on both from one credit balance and compare.