ByteDance Seed: Seedream 4.5

Get your API key

Create a key on the keys page and set it as an environment variable: Keys

export INFAPI_API_KEY=sk-...

Make your first request

Use bytedance-seed/seedream-4.5

import base64
import requests

response = requests.post(
    "https://infapi.cc/v1/images",
    headers={
        "Authorization": "Bearer $INFAPI_API_KEY",
        "Content-Type": "application/json",
    },
    json={
        "model": "bytedance-seed/seedream-4.5",
        "prompt": "A serene mountain landscape at sunset with dramatic clouds",
    },
)
response.raise_for_status()
for index, image in enumerate(response.json().get("data", [])):
    raw = base64.b64decode(image["b64_json"])
    with open(f"output_{index}.png", "wb") as handle:
        handle.write(raw)
    print(f"Saved image {index + 1}")

Using third-party SDKs

Point the OpenAI SDK at https://infapi.cc/v1 with $INFAPI_API_KEY. The HTTP samples above are the request shape this gateway accepts.

import base64
from openai import OpenAI

client = OpenAI(
    base_url="https://infapi.cc/v1",
    api_key="$INFAPI_API_KEY",
)

result = client.images.generate(
    model="bytedance-seed/seedream-4.5",
    prompt="A serene mountain landscape at sunset with dramatic clouds",
)
for index, image in enumerate(result.data):
    raw = base64.b64decode(image.b64_json)
    open(f"output_{index}.png", "wb").write(raw)

Supported parameters

• frequency_penalty

  Frequency penalty

  Lowers the chance of a token in proportion to how often it already appeared.

• max_tokens

  Max tokens

  Upper bound on generated tokens. Output stops at the limit.

• temperature

  Temperature

  Sampling temperature. Lower is steadier, higher is more varied. Often 0 to 2.

• top_p

  Top-p

  Sample only from tokens whose cumulative probability reaches top_p.