跳转到主要内容
POST
/
v1beta
/
models
/
gemini-3.1-flash-image-preview:generateContent
文生图：根据文本描述生成图片
curl --request POST \
  --url https://api.apiyi.com/v1beta/models/gemini-3.1-flash-image-preview:generateContent \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "contents": [
    {
      "parts": [
        {
          "text": "一只可爱的柴犬坐在樱花树下，水彩画风格，高清细节"
        }
      ]
    }
  ],
  "generationConfig": {
    "responseModalities": [
      "IMAGE"
    ],
    "imageConfig": {
      "aspectRatio": "16:9",
      "imageSize": "2K"
    }
  }
}
'
{
  "candidates": [
    {
      "content": {
        "parts": [
          {
            "inlineData": {
              "mimeType": "image/png",
              "data": "<string>"
            }
          }
        ]
      },
      "finishReason": "STOP"
    }
  ],
  "usageMetadata": {
    "promptTokenCount": 10,
    "candidatesTokenCount": 258
  }
}
右侧的交互式 Playground 支持下拉选择参数（宽高比、分辨率、响应类型等）。请在 Authorization 中填入你的 API Key（格式：Bearer sk-xxx），即可一键发送请求测试。
场景说明：本页用于「文本生成图片」。只需输入提示词即可，无需上传任何图片。如需根据现有图片做编辑，请使用 图片编辑接口。

​
代码示例

​
Python

import requests
import base64

API_KEY = "sk-your-api-key"
PROMPT = "一只可爱的柴犬坐在樱花树下，水彩画风格，高清细节"

response = requests.post(
    "https://api.apiyi.com/v1beta/models/gemini-3.1-flash-image-preview:generateContent",
    headers={"Authorization": f"Bearer {API_KEY}", "Content-Type": "application/json"},
    json={
        "contents": [{"parts": [{"text": PROMPT}]}],
        "generationConfig": {
            "responseModalities": ["IMAGE"],
            "imageConfig": {"aspectRatio": "16:9", "imageSize": "2K"}
        }
    },
    timeout=300
).json()

img_data = response["candidates"][0]["content"]["parts"][0]["inlineData"]["data"]
with open("output.png", 'wb') as f:
    f.write(base64.b64decode(img_data))
print("图片已保存至 output.png")

​
cURL

curl -X POST "https://api.apiyi.com/v1beta/models/gemini-3.1-flash-image-preview:generateContent" \
  -H "Authorization: Bearer sk-your-api-key" \
  -H "Content-Type: application/json" \
  -d '{
    "contents": [{"parts": [{"text": "未来主义的城市夜景，霓虹灯，赛博朋克风格"}]}],
    "generationConfig": {
      "responseModalities": ["IMAGE"],
      "imageConfig": {"aspectRatio": "16:9", "imageSize": "2K"}
    }
  }'

​
Node.js

import fs from "fs";

const API_KEY = "sk-your-api-key";

const response = await fetch(
  "https://api.apiyi.com/v1beta/models/gemini-3.1-flash-image-preview:generateContent",
  {
    method: "POST",
    headers: {
      "Authorization": `Bearer ${API_KEY}`,
      "Content-Type": "application/json"
    },
    body: JSON.stringify({
      contents: [{ parts: [{ text: "未来主义的城市夜景，霓虹灯，赛博朋克风格" }] }],
      generationConfig: {
        responseModalities: ["IMAGE"],
        imageConfig: { aspectRatio: "16:9", imageSize: "2K" }
      }
    })
  }
);

const data = await response.json();
const imgBase64 = data.candidates[0].content.parts[0].inlineData.data;
fs.writeFileSync("output.png", Buffer.from(imgBase64, "base64"));

​
参数说明速查

参数类型必填说明
contents[].parts[].textstring是文本提示词
generationConfig.responseModalitiesarray是["IMAGE"] 或 ["TEXT","IMAGE"]
generationConfig.imageConfig.aspectRatiostring否14 种宽高比，默认 1:1
generationConfig.imageConfig.imageSizestring否512 / 1K / 2K / 4K，默认 1K
详细的参数文档、可选值和默认值请查看右侧 Playground 中的字段说明，所有 enum 类型字段（如 aspectRatio、imageSize）都支持下拉选择，无需手动输入。

授权

​
Authorization
string
header
必填

在 API易控制台获取的 API Key

请求体

application/json
​
contents
object[]
必填

内容数组，包含文本提示词

​
generationConfig
object
必填

响应

成功生成图片

​
candidates
object[]

生成结果数组

​
usageMetadata
object