Seedream 4.5 

Seedream 4.5 addresses three persistent issues in production image generation: character and product inconsistency across multi-image sets, unrealistic lighting that undermines visual credibility, and degraded text rendering. The update is optimized for commercial applications - e-commerce imagery, advertising assets, and workflows where output quality directly impacts usability.

The Improvements That Actually Matter

Version 4.5 builds on Seedream 4.0 with targeted improvements rather than a complete overhaul. The focus areas - detail preservation, light and shadow rendering, and prompt adherence - sound like standard marketing speak until you see them in practice.

Better Detail Consistency
When you're working with multiple images of the same product or character, 4.5 maintains item traits more reliably. Color accuracy and brightness reproduction are noticeably improved—useful when you need a product to look identical across a campaign.

Improved Light and Shadow
The light-shadow processing creates more convincing 3D depth. This matters for product shots where you need that "looks like it was photographed" quality rather than the flat, obviously-AI look.

Readable Text in Images
Small text rendering is cleaner. If you're generating posters, product labels, or anything with legible copy, this alone might justify the update. Text is one of those things that immediately breaks the illusion when it's garbled.

Stronger Prompt Control
Complex prompts with specific composition requirements—element positioning, style constraints, multi-part instructions—get interpreted more accurately. Less "I asked for X but got Y" frustration.

Performance context: Based on internal assessments, Seedream 4.5 benchmarks ahead of Seedream 4.0 and performs comparably to other leading models in its class on visual quality metrics.

Where Seedream 4.5 Makes Sense

Not every model is the right fit for every task. Here's where I've found 4.5 actually delivers—and where you might want to look elsewhere.

Use Case

Why It Works

E-commerce

One-click product image generation with consistent item details and color tones. Useful for quickly creating scene illustrations or lifestyle shots when you have product constraints.

Marketing & Ads

Generates ad-ready visuals with that polished, commercial aesthetic. The improved composition control helps when you need specific layouts or text placement.

Film & Video Pre-production

Scene generation, character setting visualization, storyboard frames. The cinematic color grading and natural light handling work well for concept work.

Game Art

Character design, scene construction, prop concepts. Multi-image consistency helps when iterating on a single character or environment.

Educational Content

Diagrams, historical scene reconstructions, scientific visualizations. The model handles knowledge-based imagery reasonably well.

Interior & Architecture

Layout renderings and style explorations. Supports various design aesthetics for quick concept visualization.

Resolution & Output

Seedream 4.5 supports output resolutions from 1K to 4K, with total pixel counts ranging from 921,600 (1280×720) to 16,777,216 (4096×4096). Aspect ratios span 1:16 to 16:1, accommodating everything from ultra-wide banners to vertical mobile formats.

Multi-Image Input

The model accepts up to 14 reference images per request, enabling multi-image blending for consistent character or product rendering across sets. Supported input formats include JPEG, PNG, WEBP, BMP, TIFF, and GIF, with a maximum file size of 10MB per image.

Batch Generation

Sequential image generation produces up to 15 thematically related images from a single prompt. The model determines output count automatically when set to auto, or can be constrained via max_images. Total input plus output images cannot exceed 15 per request.

Prompt Optimization

Built-in prompt optimization is available in two modes: standard (higher quality, longer generation time) and fast (reduced latency, moderate quality). Prompts should remain under 600 words—longer inputs risk detail loss as the model prioritizes major elements.

Practical Considerations

For high-volume commercial use cases, the combination of batch generation, multi-image consistency, and streaming output reduces iteration cycles and accelerates asset delivery.

Summary

Seedream 4.5 delivers targeted improvements in consistency, detail preservation, and prompt adherence - areas that directly impact commercial viability. The technical capabilities (4K output, 14-image input, batch generation up to 15) position it for production workflows requiring reliable, high-volume output. For teams evaluating image generation models for e-commerce, advertising, or content production, 4.5 warrants consideration based on these specific capabilities.