What's the maximum prompt length?

150 tokens. Beyond this limit, instructions start competing with each other and results become incoherent. If you need to say more, prioritize the subject and action descriptions.

Why doesn't the (term:1.5) weight syntax work?

SeedDream uses natural language processing, not SD-style weights. The model was trained on complete sentences, not keyword tags. Use emphasis words instead: "highly detailed skin texture" rather than (detailed:1.5).

How do I prevent character drift across generations?

Use 70-85% appearance lock, fixed seeds, 5-8 visual anchors in every prompt, and explicit negative prompts for features that tend to drift. Return to your last good reference image if drift occurs.

Can I edit specific parts without masking?

Yes. SeedDream uses prompt-based selection: "Remove the person in the red shirt" works without masks. The model interprets natural language descriptions to identify edit targets.

Should I use v4.0 or v4.5?

Use v4.5 for character consistency and multi-image workflows. Use v4.0 for simple one-off generations where you want to save $0.01 per image ($0.03 vs $0.04). Explore more AI tool reviews and tutorials to level up your workflow.

Reviews

SeedDream v4.5 Prompt Engineering: The Complete Guide to Character Consistency, Photography, and Image Editing

Learn how to write effective prompts for SeedDream v4.5. Covers character consistency, photography terminology, image editing commands, and production-ready templates. Includes real cost comparisons with Flux 2 Pro, Ideogram 3.0, and Nano Banana Pro.