Seedream V4.5

• 🆕 Unifies text-to-image generation and image editing in one model.
• 🏢 ByteDance's update to its earlier Seedream 4.0 model.
• 🔧 Accepts multiple reference images for consistent multi-image results.
• 🎯 Improved typography and dense text rendering for posters, branding.
• 👁️ Strong subject identification and reference detail preservation.
• 📚 Vendor reports gains in prompt adherence, alignment, aesthetics.
• 🧠 ByteDance describes it as an all-round improvement via scaling.

ByteDance

ByteDance is a Chinese internet technology company headquartered in Beijing, widely known as the parent company behind TikTok and Douyin. Beyond social media, ByteDance has invested heavily in artificial intelligence research, building generative media models…

Seedream V4.5 is ByteDance's image-generation model, released in November 2025, that merges text-to-image synthesis and image editing into a single unified system. ByteDance positions it for professional visual creatives, emphasizing high consistency and fidelity across product photography, editorial fashion, stylized illustration, and design-heavy, layout-driven work. The model accepts multiple reference images to keep subjects and styles coherent across a batch.

Compared with its same-family predecessor Seedream 4.0, ByteDance describes Seedream 4.5 as an "all-round improvement" achieved through overall scaling of the model. On the company's internal MagicBench evaluation, ByteDance reports significant gains over 4.0 across core dimensions including prompt adherence, alignment, and aesthetics. The vendor highlights stronger multi-image subject identification, stricter preservation of reference-image details, and notably enhanced typography and dense-text rendering—an area earlier versions handled less reliably.

Within ByteDance's broader catalog, an image-editing variant shares this model's name and inpainting focus, Seedream V4.5. A lighter later entry, Seedream V5 Lite, continues the Seedream image line.

Commercial usage rights depend on the license set by ByteDance, so confirm terms before production use.