FLUX 3 Image released, with bounding boxes in prompts and up to 4K output

FLUX 3 Image gives you maximum control over every pixel. Generate an image from a prompt, edit specific parts of an image, and combine up to ten references, all through one endpoint.

Key Features

• Bounding boxes in the prompt: place every element of a layout, such as a headline, a face in a crowd, or each panel of a grid. Add a JSON list of boxes to the end of prompt; there is no separate parameter
• Pixel-exact local edits: mark the element to change and keep the rest of the image as it was. Recolor, replace, move, resize, or remove several elements in one request
• Up to ten references: name each image by its position in the prompt to restyle an image or combine references into a new composition
• Up to 4K output: resolution goes from 768sq for fast previews to 4k (about 16 megapixels), at 15 aspect ratios
• One endpoint: the prompt decides whether to generate or edit. There is no mode field

Pricing

Per image, by resolution:

| resolution | Price | | - | - | | 768sq | $0.041 | | 1k | $0.048 | | 2k | $0.100 | | 4k | $0.607 |

Endpoint

FLUX 3 Image API reference

Start with the FLUX 3 Image overview, see the box format in FLUX 3 Image Editing, or follow the Bounding boxes tutorial.