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title: OpenAI | Scenario Docs
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> This page is auto-generated from model configurations. Last updated: 2026-04-09.

This reference lists all available **OpenAI** image generation models and their parameters. Use these parameter names when calling the [Generation API](/api/postgeneratecustom/index.md).

- [GPT Image](#gpt-image)
- [GPT Image 1.5](#gpt-image-15)

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## GPT Image

OpenAI’s GPT Image 1 model for image editing and generation

**Model ID:** `model_openai-gpt-image-1-editing`

**Capabilities:** `txt2img`, `img2img`

**LLM Markdown:** <https://app.scenario.com/api/models/model_openai-gpt-image-1-editing/markdown>

| Parameter         | Type        | Required | Default | Min | Max | Allowed Values                  | Description                                    |
| ----------------- | ----------- | -------- | ------- | --- | --- | ------------------------------- | ---------------------------------------------- |
| `referenceImages` | file\_array | No       | -       | -   | -   | -                               | Reference images for style or content guidance |
| `prompt`          | string      | Yes      | -       | -   | -   | -                               | Text prompt for image editing                  |
| `numOutputs`      | number      | No       | `1`     | 1   | 10  | -                               | Number of images to generate                   |
| `aspectRatio`     | string      | No       | `auto`  | -   | -   | `auto`, `1:1`, `3:2`, `2:3`     | Aspect ratio for the generated image           |
| `inputFidelity`   | string      | No       | `high`  | -   | -   | `low`, `high`                   | Preserve details from input images             |
| `quality`         | string      | No       | `high`  | -   | -   | `high`, `medium`, `low`         | Generation quality                             |
| `background`      | string      | No       | `auto`  | -   | -   | `transparent`, `opaque`, `auto` | Background transparency                        |

## GPT Image 1.5

OpenAI’s GPT Image 1.5 model for image editing

**Model ID:** `model_openai-gpt-image-1-5-editing`

**Capabilities:** `txt2img`, `img2img`

**LLM Markdown:** <https://app.scenario.com/api/models/model_openai-gpt-image-1-5-editing/markdown>

| Parameter         | Type        | Required | Default | Min | Max | Allowed Values                  | Description                                    |
| ----------------- | ----------- | -------- | ------- | --- | --- | ------------------------------- | ---------------------------------------------- |
| `referenceImages` | file\_array | No       | -       | -   | -   | -                               | Reference images for style or content guidance |
| `prompt`          | string      | Yes      | -       | -   | -   | -                               | Text prompt for image editing                  |
| `numOutputs`      | number      | No       | `1`     | 1   | 10  | -                               | Number of images to generate                   |
| `aspectRatio`     | string      | No       | `auto`  | -   | -   | `auto`, `1:1`, `3:2`, `2:3`     | Aspect ratio for the generated image           |
| `inputFidelity`   | string      | No       | `high`  | -   | -   | `low`, `high`                   | Preserve details from input images             |
| `quality`         | string      | No       | `high`  | -   | -   | `high`, `medium`, `low`         | Generation quality                             |
| `background`      | string      | No       | `auto`  | -   | -   | `transparent`, `opaque`, `auto` | Background transparency                        |