GPT Image 2

GPT Image 2：照片级真实感、精准文字渲染、像素级图像编辑

功能特性

文生图生成
图生图编辑（最多 4 张参考图）
照片级画质与精准字体渲染
单张输出（n=1）

定价

Resolution	Credits
1k	3 (~$0.03)
2k	4 (~$0.04)
4k	5 (~$0.06)

端点

POST/api/v1/images/generate

参数

参数	类型	必需	描述
model	string	必需	Must be "gpt-image-2"
type	string	可选	"text-to-image" or "image-to-image" (default: text-to-image)
prompt	string	必需	Text description (3–20000 chars)
image_urls	string[]	可选	Required for image-to-image. Up to 4 reference image URLs
input_image	string	可选	Deprecated. Alias for image_urls[0]
image_size	string	可选	Optional aspect ratio: "1:1", "16:9", "9:16", "4:3", "3:4", "3:2", "2:3", "5:4", "4:5", "2:1", "1:2", "21:9", or "9:21". Required for 4k; auto/default is not allowed with 4k.
resolution	string	可选	Optional output resolution: "1k", "2k", or "4k" (default: "1k")
num_images	number	可选	Must be 1 (gpt-image-2 always returns a single image)

请求示例（文生图）

{
  "model": "gpt-image-2",
  "resolution": "2k",
  "prompt": "A hand-drawn illustrated greeting card with the text \"Hello, world!\" in serif letters"
}

请求示例（图生图）

{
  "model": "gpt-image-2",
  "type": "image-to-image",
  "resolution": "2k",
  "prompt": "Place the subject on a beach at golden hour, keep facial features identical",
  "image_urls": ["https://tempfile.aiquickdraw.com/workers/nano/image_1772780968156_ygk0zm.png"]
}

响应示例

{
  "success": true,
  "data": {
    "task_id": "task_gpt2_123",
    "credits_used": 4,
    "remaining_credits": 496,
    "model": "gpt-image-2"
  }
}

代码示例（文生图）

curl -X POST https://gateway.bananapro.site/api/v1/images/generate \
  -H "Authorization: Bearer sk-your-api-key" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "gpt-image-2",
    "resolution": "2k",
    "prompt": "A hand-drawn illustrated greeting card with the text \"Hello, world!\" in serif letters"
  }'

代码示例（图生图）

curl -X POST https://gateway.bananapro.site/api/v1/images/generate \
  -H "Authorization: Bearer sk-your-api-key" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "gpt-image-2",
    "type": "image-to-image",
    "resolution": "2k",
    "prompt": "Place the subject on a beach at golden hour, keep facial features identical",
    "image_urls": ["https://tempfile.aiquickdraw.com/workers/nano/image_1772780968156_ygk0zm.png"]
  }'

Resolution

Credits

3 (~$0.03)

4 (~$0.04)

5 (~$0.06)

参数

类型

必需

描述

model

string

必需

Must be "gpt-image-2"

type

string

可选

"text-to-image" or "image-to-image" (default: text-to-image)

prompt

string

必需

Text description (3–20000 chars)

image_urls

string[]

可选

Required for image-to-image. Up to 4 reference image URLs

input_image

string

可选

Deprecated. Alias for image_urls[0]

image_size

string

可选

Optional aspect ratio: "1:1", "16:9", "9:16", "4:3", "3:4", "3:2", "2:3", "5:4", "4:5", "2:1", "1:2", "21:9", or "9:21". Required for 4k; auto/default is not allowed with 4k.

resolution

string

可选

Optional output resolution: "1k", "2k", or "4k" (default: "1k")

num_images

number

可选

Must be 1 (gpt-image-2 always returns a single image)

{ "model": "gpt-image-2", "type": "image-to-image", "resolution": "2k", "prompt": "Place the subject on a beach at golden hour, keep facial features identical", "image_urls": ["https://tempfile.aiquickdraw.com/workers/nano/image_1772780968156_ygk0zm.png"] }

curl -X POST https://gateway.bananapro.site/api/v1/images/generate \ -H "Authorization: Bearer sk-your-api-key" \ -H "Content-Type: application/json" \ -d '{ "model": "gpt-image-2", "resolution": "2k", "prompt": "A hand-drawn illustrated greeting card with the text \"Hello, world!\" in serif letters" }'

curl -X POST https://gateway.bananapro.site/api/v1/images/generate \ -H "Authorization: Bearer sk-your-api-key" \ -H "Content-Type: application/json" \ -d '{ "model": "gpt-image-2", "type": "image-to-image", "resolution": "2k", "prompt": "Place the subject on a beach at golden hour, keep facial features identical", "image_urls": ["https://tempfile.aiquickdraw.com/workers/nano/image_1772780968156_ygk0zm.png"] }'