Nano Banana 2 Image API Reference

Nano Banana 2

新一代图像生成与编辑，支持 Google 搜索、最多 14 张参考图和 4K 输出

Endpoint: POST /api/v1/images/generate
model: nano-banana-2
Output: Image
Credits: from 7

提交任务

POST/api/v1/images/generate

参数

modelstring必需
Must be "nano-banana-2"
typestring可选默认 text-to-image
"text-to-image" or "image-to-image" (default: text-to-image)
text-to-imageimage-to-image
promptstring必需
Text description of the image to generate. Supports up to 20,000 characters.
resolutionstring可选默认 1K
"1K", "2K", or "4K" (default: 1K)
1K2K4K
aspect_ratiostring可选
"auto", "1:1", "16:9", "9:16", "4:3", "3:4", "1:4", "1:8", "4:1", "8:1", "21:9"
auto1:116:99:164:33:41:41:84:18:121:9
image_urlsstring[]可选
Input image URLs or base64 for image-to-image. Supports up to 14 images.
input_imagestring可选
Deprecated. Alias for image_urls[0]
google_searchboolean可选
Enable Google Search grounding for real-time information
truefalse
google_image_searchboolean可选
Enable image search grounding. Requires google_search=true.
truefalse
output_formatstring可选默认 jpg
"jpg" or "png" (default: jpg)
jpgpng
num_imagesnumber可选
Must be 1

请求

curl -X POST https://www.bananapro.site/api/v1/images/generate \
  -H "Authorization: Bearer sk-your-api-key" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "nano-banana-2",
    "prompt": "A cinematic product photo of a transparent smart speaker on a glass table",
    "resolution": "2K",
    "aspect_ratio": "16:9"
  }'

响应200

JSON

{
  "success": true,
  "data": {
    "task_id": "task_nb2_abc123",
    "credits_used": 11,
    "remaining_credits": 489,
    "model": "nano-banana-2"
  }
}

示例中的 credits_used 数值仅供说明。实际消耗会在提交时计算，并由 API 返回。

查询任务

GET/api/v1/images/{task_id}

status

pending: Accepted and waiting to start. Keep polling.
processing: Running. Keep polling.
completed: Finished. Read image_url; output holds the full result.
failed: Ended without a result. error_message says why and credits_refunded shows what was returned.

Poll every 5 to 10 seconds and stop at completed or failed, or register a webhook to be notified instead. Failed tasks are refunded automatically.

请求

curl https://www.bananapro.site/api/v1/images/task_abc123 \
  -H "Authorization: Bearer sk-your-api-key"

响应200

JSON

{
  "success": true,
  "data": {
    "task_id": "task_abc123",
    "model": "nano-banana-2",
    "status": "completed",
    "output": { "images": [{ "url": "https://..." }] },
    "primary_url": "https://...",
    "image_url": "https://...",
    "error_message": null,
    "credits_used": 11,
    "credits_refunded": 0,
    "created_at": "2026-10-04T10:00:00.000Z",
    "updated_at": "2026-10-04T10:01:12.000Z",
    "completed_at": "2026-10-04T10:01:12.000Z"
  },
  "request_id": "req_abc123"
}

等待结果

TASK_ID=task_abc123
while true; do
  TASK=$(curl -s https://www.bananapro.site/api/v1/images/$TASK_ID \
    -H "Authorization: Bearer sk-your-api-key")
  STATUS=$(echo "$TASK" | jq -r '.data.status')
  if [ "$STATUS" = "completed" ] || [ "$STATUS" = "failed" ]; then
    echo "$TASK" | jq
    break
  fi
  sleep 10
done

定价

Resolution	Credits
1K	7
2K	11
4K	15

功能特性

文生图生成
图像到图像的转换
Google 搜索增强
最多 14 张参考图
超宽高比与最高 4K 分辨率

curl -X POST https://www.bananapro.site/api/v1/images/generate \ -H "Authorization: Bearer sk-your-api-key" \ -H "Content-Type: application/json" \ -d '{ "model": "nano-banana-2", "prompt": "A cinematic product photo of a transparent smart speaker on a glass table", "resolution": "2K", "aspect_ratio": "16:9" }'

{ "success": true, "data": { "task_id": "task_abc123", "model": "nano-banana-2", "status": "completed", "output": { "images": [{ "url": "https://..." }] }, "primary_url": "https://...", "image_url": "https://...", "error_message": null, "credits_used": 11, "credits_refunded": 0, "created_at": "2026-10-04T10:00:00.000Z", "updated_at": "2026-10-04T10:01:12.000Z", "completed_at": "2026-10-04T10:01:12.000Z" }, "request_id": "req_abc123" }

TASK_ID=task_abc123 while true; do TASK=$(curl -s https://www.bananapro.site/api/v1/images/$TASK_ID \ -H "Authorization: Bearer sk-your-api-key") STATUS=$(echo "$TASK" | jq -r '.data.status') if [ "$STATUS" = "completed" ] || [ "$STATUS" = "failed" ]; then echo "$TASK" | jq break fi sleep 10 done

Resolution

Credits