managarten/picture/docs/models/seedream-4.md

ByteDance SeeDream 4

Overview

SeeDream 4 is ByteDance's latest generation image model featuring unified text-to-image generation and precise single-sentence editing capabilities. It offers significant improvements over SeeDream 3 with higher resolution support and more flexible workflows.

Model Details

• Provider: ByteDance
• Replicate ID: bytedance/seedream-4
• Version: 054cd8c667f535616fd66710ce20c8949bf64ac3d9a3459e338f026424be8bec

Key Features

• Unified Architecture: Single model for both generation and editing
• Ultra High Resolution: Up to 4K (4096x4096) output
• Multi-Reference Support: Use up to 10 reference images
• Batch Generation: Generate up to 15 images in one request
• Precise Editing: Natural language prompt-based editing
• Consistent Characters: Maintains character consistency across multiple outputs

Default Parameters

• Resolution: 2048x2048 (2K preset)
• Steps: 50 (automatic based on size preset)
• Guidance Scale: 7.5 (automatic)
• Supports Negative Prompts: No
• Supports Seed: No
• Supports Image-to-Image: Yes (via image_input array)

Supported Aspect Ratios

8 fixed ratios:

• Square: 1:1
• Landscape: 4:3, 16:9, 3:2, 21:9
• Portrait: 3:4, 9:16, 2:3

Additionally supports "match_input_image" when using reference images.

Size Presets

• 1K: Best for quick previews (1024-2047px)
• 2K: Balanced quality and speed (2048-3071px) - Default
• 4K: Maximum quality (4096px)
• Custom: Specify exact width/height (1024-4096px range)

Best Use Cases

• Character consistency across multiple scenes
• High-resolution commercial imagery
• Image editing with natural language prompts
• Multi-view generation from single prompt
• Reference-based generation
• Batch creation of variations

Example Prompts

1. "A professional portrait of a woman in business attire, modern office background, natural lighting"
2. "A selection of photos of this character [reference] exploring a bookshop called 'SeeDream 4'"
3. "Multiple views of a futuristic car design, different angles and lighting"

Tips for Best Results

• Use the 2K preset for optimal balance of quality and speed
• Leverage multi-reference input for character consistency
• Use natural language for precise editing instructions
• Request multiple outputs for variations in one go
• Specify detailed scene descriptions for better results
• For ultra-high quality, use 4K preset

Strengths

• Exceptional high-resolution output (up to 4K)
• Unified generation and editing workflow
• Excellent character consistency
• Multi-reference and batch capabilities
• Fast inference compared to quality level
• Natural language editing

Limitations

• No manual seed control
• No negative prompt support
• Fixed aspect ratios only (no completely custom ratios)
• Slightly higher cost than SeeDream 3 ($0.03 vs $0.025)

Cost

$0.03 per generation (regardless of resolution)

Migration from SeeDream 3

If you're upgrading from SeeDream 3:

• Resolution limits increased: 2048x2048 → 4096x4096
• New parameter structure (size presets instead of raw dimensions)
• Removed: seed support, negative prompts
• Added: image_input array, multi-image generation, higher resolutions
• Slightly higher cost but significantly more features