SeeDream 4.5 Launch: BytePlus Volcano Engine's Most Powerful 4K Image Generation Model

​

Key Highlights

• 1.2B Parameter Architecture: ByteDance’s latest unified image generation and editing system
• 4K HD Enhancement: Significantly improved image quality and detail performance compared to SeeDream 4.0
• Text Rendering Breakthrough: Clearer small text rendering, more natural facial features
• Multi-Image Composition: Supports up to 10 reference images, maintaining subject consistency
• Exceptional Value: $0.035/image, official provides 200 free images for testing

​

Background

​

Detailed Analysis

​

Core Features

​

Performance Highlights

​

Comparison with SeeDream 4.0

​

Technical Specifications

• Resolution Specs: “1K”, “2K”, “4K” - let model automatically decide optimal aspect ratio based on prompt
• Exact Pixels: “2048x2048”, “1920x1080”, “3840x2160”, etc.
• Pixel Range: [1280×720, 4096×4096]
• Aspect Ratio Range: [1/16, 16]

• standard - Standard quality, faster speed
• hd - High-definition quality, richer details

• url - Return image URL
• b64_json - Return Base64 encoded image data

​

Practical Applications

​

Recommended Scenarios

​

Code Example

import requests
import base64
import datetime

# API Configuration
API_KEY = "sk-your-api-key"
API_URL = "https://api.apiyi.com/v1/images/generations"

# Generate image
def generate_image(prompt, size="4K", quality="hd"):
    response = requests.post(
        API_URL,
        headers={
            "Content-Type": "application/json",
            "Authorization": f"Bearer {API_KEY}"
        },
        json={
            "model": "seedream-4-5-251128",
            "prompt": prompt,
            "size": size,
            "quality": quality,
            "n": 1,
            "response_format": "url"
        },
        timeout=60
    )

    if response.status_code == 200:
        result = response.json()
        image_url = result["data"][0]["url"]
        print(f"✅ Image generated successfully!")
        print(f"🔗 Image URL: {image_url}")
        return image_url
    else:
        print(f"❌ Generation failed: {response.text}")
        return None

# Usage example
if __name__ == "__main__":
    # Generate marketing poster
    prompt = """
    A modern tech product launch poster with bold typography,
    featuring a sleek smartphone on gradient background,
    text: 'Innovation 2025', 4K, ultra detailed, professional
    """

    generate_image(prompt, size="4K", quality="hd")

​

Best Practices

1. Detailed Descriptions: Provide specific scene, style, color descriptions
2. Add Quality Tags: Such as “4K”, “ultra detailed”, “high quality”, “professional”
3. Specify Style: Such as “photorealistic”, “minimalist”, “cinematic”
4. Include Lighting Info: Such as “soft lighting”, “golden hour”, “studio lighting”
5. Text Content: Use “text: ’…’” to explicitly specify text in images

A professional product photography of wireless headphones on white background,
soft studio lighting from top-left, subtle shadows, minimal composition,
text: 'Premium Sound', 4K resolution, commercial photography style

headphones on white background

​

Pricing and Availability

​

Pricing Information

​

Promotional Activities

1. New User Benefits:
   • Official provides 200 free images for testing
   • Extra 15% bonus on first top-up
2. Top-up Bonuses:
   • Top up $100+ get 15% bonus
   • Top up $500+ get 20% bonus
   • Enterprise users support B2B payment and invoicing
3. Cost-Effectiveness Advantage:
   • Compared to Nano Banana Pro ($0.05/image), better pricing
   • Stronger text rendering capability, suitable for marketing materials
   • Strong batch processing capability, suitable for mass production

​

Purchase Channels

1. Register Account: Visit APIYI official website to register
2. Get API Key: Create API key in console
3. Top Up Balance: Choose appropriate top-up package
4. Start Calling: Use standard OpenAI Image API format to call

• APIYI Official Website: api.apiyi.com
• Console: api.apiyi.com/account/profile
• Detailed Documentation: docs.apiyi.com/api-capabilities/seedream-image
• Image Testing Tool: imagen.apiyi.com

​

Summary and Recommendations

​

Usage Recommendations

• ✅ Need images with clear text (posters, advertisements)
• ✅ Pursue best quality and detail performance
• ✅ Professional design, commercial use
• ✅ Need high-resolution print output
• ✅ Multi-image composition, series image generation

• ✅ Pursue cost-effectiveness
• ✅ Daily image generation needs
• ✅ Moderate text rendering requirements

• Best Quality → SeeDream 4.5 ($0.035/image)
• Cost-Effectiveness → SeeDream 4.0 ($0.03/image)
• Fast Generation → Nano Banana ($0.025/image, 10 seconds)