Seedream 4.5

ByteDance chatvisionimage_gentool_use Free

API ID: bytedance-seed/seedream-4.5-20251203

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Input Price
Free
/1M tokens
Output Price
Free
/1M tokens

About Seedream 4.5

Seedream 4.5 is the latest in-house image generation model developed by ByteDance. Compared with Seedream 4.0, it delivers comprehensive improvements, especially in editing consistency, including better preservation of subject details, lighting, and color tone. It also enhances portrait refinement and small-text rendering. The model’s multi-image composition capabilities have been significantly strengthened, and both reasoning performance and visual aesthetics continue to advance, enabling more accurate and artistically expressive image generation. Pricing is $0.04 per output image, regardless of size.

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Price Ranking
#6 lowest price among 1240 Chat models — Top 20% cheapest!

Model Specifications

Context Length
4k
Max Output
—
Release Date
2025-12-23
Capabilities
chat vision image_gen tool_use
Input Modalities
imagetext
Output Modalities
image

Best For

  • Image analysis, document understanding, visual Q&A
  • Conversations, content writing, general assistance
🎉

This model is completely free!

No token costs - use it without worrying about API bills.

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ByteDance Model Lineup

Compare all models from ByteDance to find the best fit

Model Input Output Context Capabilities
Seedream 4.5 Current Free Free 4k chat vision image_gen tool_use
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UI-TARS 72B Free Free 33k chat vision
Seed OSS 36B Instruct Free Free 131k chat reasoning
Seed OSS 36B Instruct Free Free 131k chat reasoning
UI-TARS 7B $0.10 $0.20 128k chat vision
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🚀 Quick Start

Get started with Seedream 4.5 API

OpenAI-compatible SDK 
from openai import OpenAI

client = OpenAI(
    base_url="https://api.provider.com/v1",
    api_key="YOUR_API_KEY"
)

response = client.chat.completions.create(
    model="bytedance-seed/seedream-4.5-20251203",
    messages=[
        {"role": "user", "content": "Hello!"}
    ]
)
print(response.choices[0].message.content)

Resources

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