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google/nano-banana-2.1/image-to-image

图生图
在线试用获取 API 密钥OpenAPIllms.txt

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更多设置（6 项）

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生成结果演示示例登录后试用

按 token 计费 · 默认设置约 $0.042 / 张 · 每次冻结 $0.041572

Nano Banana 2.1 图生图示例
示例 · 由以下输入生成

Replace the iced oolong milk tea with a hot matcha latte in a white ceramic cup, change the headline to "MATCHA MOMENTS", and keep the layout, caption and lighting unchanged.

价格

文字输入 /M
$1.764
图片输入 /M
$1.764
文字输出 /M
$8.823
图片输出 /M
$35.294

默认设置（1K、1 张）约 $0.042 / 张；质量、尺寸、张数越高，用量越多。

每次请求会先临时冻结 $0.041572，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-2.1/image-to-image
请求体
{
  "model": "google/nano-banana-2.1/image-to-image",
  "input": {
    "prompt": "Replace the iced oolong milk tea with a hot matcha latte in a white ceramic cup, change the headline to \"MATCHA MOMENTS\", and keep the layout, caption and lighting unchanged.",
    "aspect_ratio": "auto",
    "enable_web_search": false,
    "num_images": 1,
    "output_format": "png",
    "resolution": "1K",
    "system_prompt": "",
    "thinking_level": "medium",
    "image_urls": [
      "https://pub-a7287c8d5de944d984e22a5bd3ab9bbe.r2.dev/uploads/capability-demo-30948c557586d13e777bfe3cf3454b1e.png"
    ]
  }
}

输入 Schema

参数类型是否必填默认值
promptstring必填—
aspect_ratiostring可选auto
enable_web_searchboolean可选false
image_urlsarray可选—
num_imagesinteger可选1
output_formatstring可选png
resolutionstring可选1K
seedinteger可选—
system_promptstring可选
thinking_levelstring可选medium

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-2.1/image-to-image",
  "status": "queued"
}
状态响应
HTTP 200
/v1/model-tasks/{id}application/json
{
  "id": "task_example",
  "model": "google/nano-banana-2.1/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: $REQUEST_ID" \
  --header "Content-Type: application/json" \
  --data '{"model":"google/nano-banana-2.1/image-to-image","input":{"prompt":"Replace the iced oolong milk tea with a hot matcha latte in a white ceramic cup, change the headline to \"MATCHA MOMENTS\", and keep the layout, caption and lighting unchanged.","aspect_ratio":"auto","enable_web_search":false,"num_images":1,"output_format":"png","resolution":"1K","system_prompt":"","thinking_level":"medium","image_urls":["https://pub-a7287c8d5de944d984e22a5bd3ab9bbe.r2.dev/uploads/capability-demo-30948c557586d13e777bfe3cf3454b1e.png"]}}'
# Poll every 5 seconds for up to 25 minutes until status is completed or failed.
# Still queued (with queue_position) 5 minutes after submission: failed with queue_timeout, not charged.
# No result 15 minutes after acceptance (or no confirmation 15 minutes after submission): failed with generation_timeout, not charged.
# Any failure is final: generate again in a new directory (a new X-Request-Id).
# A 404 means the POST did not arrive: rerun this script to resend it with the same ID.
curl --fail-with-body 'https://api.musespan.com/v1/model-tasks/'"$REQUEST_ID"'' --header "Authorization: Bearer $MUSESPAN_API_KEY"