Introduction
What Is Seedream 4.5?
Seedream 4.5 is an image generation and editing model from ByteDance, released on December 3, 2025. It builds on Seedream 4.0, which was already known for combining image creation and photo editing in one model. For 4.5, ByteDance says it scaled up the whole model and focused on the problems people ran into in real work: products that changed shape between shots, small text that came out blurry, and faces that looked off when they filled only a tiny part of the picture.
The result is a model that is careful with details. When you give it several reference photos, Seedream 4.5 picks out the main subject in each one and keeps its details—a logo spot, a stitch, a hairstyle—when it builds the new image. Posters and packaging get cleaner layouts and more readable small text. Light, color, depth, and proportions look more natural, and complicated prompts with many elements are followed more closely. In ByteDance's own tests, it scored higher than Seedream 4.0 on prompt following, matching the references, and overall look.
On PixPal, Seedream 4.5 handles both text-to-image and image-to-image. You can upload up to 14 reference images, pick 2K or 4K output, and create anywhere from 1 to 15 images in a single run. There are 10 aspect ratios, from square 1:1 to wide 21:9, plus an Auto option that matches your uploaded photo. It is the most budget-friendly way to get 4K images on PixPal. If you need text in many languages or edits where you point to a spot, look at the newer Seedream 5.0 Pro.











