---
title: "flux-2-fast"
url: "https://docs.api.pruna.ai/apis/models-api-0/versions/e82c070d-36fc-4aa3-b8cc-8140e0221f53/schemas/flux-2-fast"
---

> Full API specification: https://docs.api.pruna.ai/apis/models-api-0/versions/e82c070d-36fc-4aa3-b8cc-8140e0221f53.md

# flux-2-fast

## OpenAPI definition

```yaml
openapi: 3.0.3
info:
  title: P-API
  version: 0.1.0
servers:
  - url: https://api.pruna.ai
    description: Production server
components:
  schemas:
    flux-2-fast:
      type: object
      required:
        - input
      properties:
        input:
          type: object
          required:
            - prompt
          properties:
            prompt:
              type: string
              description: Text prompt for image generation.
            aspect_ratio:
              type: string
              description: Aspect ratio for the generated image.
              enum:
                - 1:1
                - 16:9
                - 9:16
                - 4:3
                - 3:4
                - 3:2
                - 2:3
                - custom
              default: 1:1
            images:
              type: array
              items:
                type: string
                format: uri
              description: Images to use as a reference. For editing task, provide the main
                image as the first image.
              default: []
            go_fast:
              type: boolean
              description: Run faster predictions with additional optimizations.
              default: true
            width:
              type: integer
              description: Width of the generated image. Only used when aspect_ratio=custom.
                Must be a multiple of 16.
              minimum: 256
              maximum: 2048
              multipleOf: 16
            height:
              type: integer
              description: Height of the generated image. Only used when aspect_ratio=custom.
                Must be a multiple of 16.
              minimum: 256
              maximum: 2048
              multipleOf: 16
            seed:
              type: integer
              description: Random seed. Set for reproducible generation.
            guidance:
              type: number
              description: Guidance scale.
              default: 2.5
            disable_safety_checker:
              type: boolean
              description: Disable safety checker for generated images.
              default: false
          additionalProperties: false
```