google/nano-banana-2-lite/image-to-image

图生图

在线试用获取 API 密钥OpenAPI llms.txt

提示词 *

272 / 50,000

Image URLs

1 *

Aspect Ratio

更多设置（5 项）

Number of Images

Output Format

随机种子

System Prompt

0 / 50,000

Thinking Level

生成结果演示示例登录后试用

按用量计费 · 约 $0.042 / 张 · 每次冻结 $0.042367

示例 · 由以下输入生成

Change the rainy night outside the window into a bright, sunny spring morning with a blossoming pink cherry tree and blue sky. Keep everything else in the room exactly the same, including the sleeping cat, the armchair, the lamp, the books and the flat illustration style.

价格

按实际用量计费，没有固定单价。

默认设置下通常约 $0.042 / 张。

每次请求会先临时冻结 $0.042367，按实际用量扣费，通常在一分钟内完成：多余部分退回，超出部分从余额扣除，余额可能因此变为负数；余额为负时新请求暂停，充值后先抵扣欠款。

生成失败不收费。

API 接入

用这个模型 ID 提交生成请求。

POST/v1/model-tasks

google/nano-banana-2-lite/image-to-image

请求体

{
  "model": "google/nano-banana-2-lite/image-to-image",
  "input": {
    "prompt": "Change the rainy night outside the window into a bright, sunny spring morning with a blossoming pink cherry tree and blue sky. Keep everything else in the room exactly the same, including the sleeping cat, the armchair, the lamp, the books and the flat illustration style.",
    "aspect_ratio": "auto",
    "num_images": 1,
    "output_format": "png",
    "system_prompt": "",
    "image_urls": [
      "https://pub-a7287c8d5de944d984e22a5bd3ab9bbe.r2.dev/uploads/capability-demo-10cce3df8d83f45dc4d93ee51fc27425.png"
    ]
  }
}

输入 Schema

参数	类型	是否必填	默认值
prompt	string	必填	—
aspect_ratio	string	可选	auto
image_urls	array	可选	—
num_images	integer	可选	1
output_format	string	可选	png
seed	integer	可选	—
system_prompt	string	可选
thinking_level	string	可选	—

返回结果

接口会返回生成结果，或返回可轮询的异步任务；具体响应方式与结果字段见下方示例和 Schema。

异步任务

提交响应

HTTP 202

/v1/model-tasksapplication/json

{
  "id": "task_example",
  "model": "google/nano-banana-2-lite/image-to-image",
  "status": "queued"
}

状态响应

HTTP 200

/v1/model-tasks/{id}application/json

{
  "id": "task_example",
  "model": "google/nano-banana-2-lite/image-to-image",
  "status": "completed",
  "output": {
    "images": [
      {
        "url": "https://api.musespan.com/v1/model-tasks/task_example/artifacts/0"
      }
    ]
  }
}

文件下载

HTTP 200

/v1/model-tasks/{id}/artifacts/{index}生成的图片（如 image/png）

任务完成后，output 里的文件地址就指向此接口，序号从 0 开始。下载时要带上同一个 API Key（Authorization 请求头）。

错误响应

HTTP 400

/v1/model-tasksapplication/json

{
  "error": {
    "code": "invalid_input",
    "message": "The input does not match this model's input schema. Check the model's API documentation.",
    "type": "invalid_request_error"
  }
}

调用示例

异步任务提交后返回任务 ID，轮询至 status 为 completed 后，按返回结果获取生成内容。API Key 在控制台获取。

# Use a new directory for each new generation. Rerunning here continues this task.
set -eu
test -s model-task-id.txt || python3 -c "import uuid; print(uuid.uuid4())" > model-task-id.txt
REQUEST_ID=$(cat model-task-id.txt)
# Idempotent: resending the same bytes with the same ID never charges twice.
curl --fail-with-body --retry 3 --retry-connrefused --request POST 'https://api.musespan.com/v1/model-tasks' \
  --header "Authorization: Bearer $MUSESPAN_API_KEY" \
  --header "X-Request-Id: $REQUEST_ID" \
  --header "Content-Type: application/json" \
  --data '{"model":"google/nano-banana-2-lite/image-to-image","input":{"prompt":"Change the rainy night outside the window into a bright, sunny spring morning with a blossoming pink cherry tree and blue sky. Keep everything else in the room exactly the same, including the sleeping cat, the armchair, the lamp, the books and the flat illustration style.","aspect_ratio":"auto","num_images":1,"output_format":"png","system_prompt":"","image_urls":["https://pub-a7287c8d5de944d984e22a5bd3ab9bbe.r2.dev/uploads/capability-demo-10cce3df8d83f45dc4d93ee51fc27425.png"]}}'
# Poll every 5 seconds for up to 25 minutes until status is completed or failed.
# Still queued (with queue_position) 5 minutes after submission: failed with queue_timeout, not charged.
# No result 15 minutes after acceptance (or no confirmation 15 minutes after submission): failed with generation_timeout, not charged.
# Any failure is final: generate again in a new directory (a new X-Request-Id).
# A 404 means the POST did not arrive: rerun this script to resend it with the same ID.
curl --fail-with-body 'https://api.musespan.com/v1/model-tasks/'"$REQUEST_ID"'' --header "Authorization: Bearer $MUSESPAN_API_KEY"