gpt-image-2 流

Streaming

Responses API 和 Image API 支持流式图像生成。可以随着 API 的生成过程流式获取部分图像，从而提供更具交互性的体验。

可以通过调整 partial_images 参数来接收 0 到 3 张部分图像。

• 如果将 partial_images 设置为 0，将仅收到最终图像。
• 对于大于零的值，如果完整图像生成得更快，可能无法收到所请求的全部部分图像。

Responses API

from openai import OpenAI
import base64

client = OpenAI()

stream = client.responses.create(
    model="gpt-5.5",
    input="Draw a gorgeous image of a river made of white owl feathers, snaking its way through a serene winter landscape",
    stream=True,
    tools=[{"type": "image_generation", "partial_images": 2}],
)

for event in stream:
    if event.type == "response.image_generation_call.partial_image":
        idx = event.partial_image_index
        image_base64 = event.partial_image_b64
        image_bytes = base64.b64decode(image_base64)
        with open(f"river{idx}.png", "wb") as f:
            f.write(image_bytes)

Image API

from openai import OpenAI
import base64

client = OpenAI()

stream = client.images.generate(
    prompt="Draw a gorgeous image of a river made of white owl feathers, snaking its way through a serene winter landscape",
    model="gpt-image-2",
    stream=True,
    partial_images=2,
)

for event in stream:
    if event.type == "image_generation.partial_image":
        idx = event.partial_image_index
        image_base64 = event.b64_json
        image_bytes = base64.b64decode(image_base64)
        with open(f"river{idx}.png", "wb") as f:
            f.write(image_bytes)

结果

提示：画一幅由白猫头鹰羽毛构成的河流，蜿蜒流经一片宁静的冬日风景，画面要美不胜收。