/IMAGE/gpt-image-2

Image

OpenAI

GPT Image 2 API

Generate and edit images with flexible aspect ratios, resolution, and quality controls.

Text to image
Image editing

Get API Key Documentation

Starting at

$0.013

per generation

75% cheaper than fal.ai

4 parameters · 3 price options

Playground

Input

Prompt*

User's prompt

URLs

Reference image URLs (URLs or base64 data URIs) for image-to-image mode

Runs are charged to your balance.

Output

Output will appear here.

Pricing

Option	Price per generation	fal.ai	Your savings
1k	$0.013	$0.053	−75%
2k	$0.021	$0.056	−63%
4k	$0.032	$0.101	−68%

Quick start

Full API reference →

1curl -X POST https://api.api-stock.com/api/v1/generation/create \
2  -H "Authorization: Bearer $API_STOCK_KEY" \
3  -H "Content-Type: application/json" \
4  -d '{
5    "model": "gpt-image-2",
6    "input": {
7      "prompt": "A cinematic shot of a city at dusk",
8      "size": "1:1",
9      "resolution": "1k"
10    }
11  }'

Parameters

Name	Type	Required	Default	Description
`prompt`	string	Yes	—	User's prompt
`urls`	string[]	No	—	Reference image URLs (URLs or base64 data URIs) for image-to-image mode
`size`	string	No	1:1	Output image aspect ratio. For GPT Image 2.5 models, 1:3 and 3:1 require 2k or 4k resolution.One of: auto, 1:1, 16:9, 9:16, 4:3, 3:4, 3:2, 2:3, 5:4, 4:5, 2:1, 1:2, 3:1, 1:3, 21:9, 9:21
`resolution`	string	No	1k	Output image resolutionOne of: 1k, 2k, 4k

Frequently asked questions

How much does GPT Image 2 cost?

GPT Image 2 starts at $0.013 per generation through the API Stock API. You pay per use from a single prepaid balance — there is no subscription — and the final price scales with parameters such as resolution or duration.

How do I get an API key for GPT Image 2?

Sign up for API Stock, top up your balance by any amount and create an API key in the dashboard — it takes a couple of minutes and needs no contract. The same key works with every model in the catalog, so there is no separate key to obtain for GPT Image 2.

How do I call the GPT Image 2 API?

Send a POST request to https://api.api-stock.com/api/v1/generation/create with your API key and the model id "gpt-image-2". The call returns a task id you poll, or a webhook callback when the result is ready. A ready-to-run example is in the quick start above.

What input parameters does GPT Image 2 accept?

GPT Image 2 accepts 4 input parameters, including the required field(s) prompt. Their types, defaults and allowed values are listed in the parameters table above.

What happens if a GPT Image 2 request fails?

API Stock automatically retries the request on a reserve provider. If every provider fails, the charge is refunded to your balance.

Can I use GPT Image 2 with the same API key as other models?

Yes. Every model on API Stock — video, image, music and chat — shares one API key and one prepaid balance, so you can switch to GPT Image 2 without new credentials.

Other Image models

Guides