FLUX.2 Flex Text to Image

curl --request POST \
  --url https://api.vidgo.ai/api/generate/submit \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data @- <<EOF
{
  "model": "blackforestlabs/flux-2-flex/text-to-image",
  "input": {
    "prompt": "An overhead photograph of an open naturalist's field notebook lying on a sun-warmed basalt rock beside a tide pool. The two cream, lightly textured pages are filled with delicate pencil and watercolour studies: on the left page a purple ochre sea star, a giant green anemone with open tentacles, and a hermit crab in a turban-snail shell; on the right page a cluster of goose barnacles, a small tidepool sculpin, and a strand of rockweed. Each drawing has a neat handwritten ink label: \"Pisaster ochraceus\", \"Anthopleura xanthogrammica\", \"Pagurus samuelis\", \"Pollicipes polymerus\", \"Oligocottus maculosus\", \"Fucus distichus\". Across the top of the left page, the handwritten heading reads exactly \"LOW TIDE 0.3 m - 14 MAY\". Small measurement ticks and fine arrows point to anatomical details. A graphite pencil, a small brass magnifier and a water brush rest on the pages; a few drops of seawater and grains of sand sit near the paper edge. Soft overcast light, true-to-life paper texture, visible watercolour blooms and pencil grain, legible correctly spelled handwriting, no other text, no logos, no watermark.",
    "size": "4:3",
    "resolution": "1K"
  }
}
EOF

{
  "code": 200,
  "data": {
    "task_id": "SBR3R4D3GOFPXM1Z",
    "status": "running",
    "created_time": "2026-09-26T11:07:50"
  }
}

{
  "detail": "<string>"
}

{
  "detail": "<string>"
}

{
  "detail": "<string>"
}

{
  "detail": "<string>"
}

Request timeout

{
  "detail": "<string>"
}

{
  "detail": "<string>"
}

{
  "detail": "<string>"
}

{
  "detail": "<string>"
}

{
  "detail": "<string>"
}

POST

api

generate

submit

curl --request POST \
  --url https://api.vidgo.ai/api/generate/submit \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data @- <<EOF
{
  "model": "blackforestlabs/flux-2-flex/text-to-image",
  "input": {
    "prompt": "An overhead photograph of an open naturalist's field notebook lying on a sun-warmed basalt rock beside a tide pool. The two cream, lightly textured pages are filled with delicate pencil and watercolour studies: on the left page a purple ochre sea star, a giant green anemone with open tentacles, and a hermit crab in a turban-snail shell; on the right page a cluster of goose barnacles, a small tidepool sculpin, and a strand of rockweed. Each drawing has a neat handwritten ink label: \"Pisaster ochraceus\", \"Anthopleura xanthogrammica\", \"Pagurus samuelis\", \"Pollicipes polymerus\", \"Oligocottus maculosus\", \"Fucus distichus\". Across the top of the left page, the handwritten heading reads exactly \"LOW TIDE 0.3 m - 14 MAY\". Small measurement ticks and fine arrows point to anatomical details. A graphite pencil, a small brass magnifier and a water brush rest on the pages; a few drops of seawater and grains of sand sit near the paper edge. Soft overcast light, true-to-life paper texture, visible watercolour blooms and pencil grain, legible correctly spelled handwriting, no other text, no logos, no watermark.",
    "size": "4:3",
    "resolution": "1K"
  }
}
EOF

{
  "code": 200,
  "data": {
    "task_id": "SBR3R4D3GOFPXM1Z",
    "status": "running",
    "created_time": "2026-09-26T11:07:50"
  }
}

{
  "detail": "<string>"
}

{
  "detail": "<string>"
}

{
  "detail": "<string>"
}

{
  "detail": "<string>"
}

Request timeout

{
  "detail": "<string>"
}

{
  "detail": "<string>"
}

{
  "detail": "<string>"
}

{
  "detail": "<string>"
}

{
  "detail": "<string>"
}

After submission, a task_id will be returned. If you provided a callback_url, when the task status becomes finished or failed, a POST request will be sent to the callback_url.
Regardless of whether callback_url is provided, you can retrieve the result through the unified Query Task Status endpoint.

Explore image concepts with FLUX.2 Flex, using descriptive prompts to shape composition and style in 1K or 2K output.

Models

blackforestlabs/flux-2-flex/text-to-image - Generate images from text prompts.

Features

Generate images from text prompts.
Choose from 1K, 2K output resolutions.

Output Options

Image Size

size: Required. Accepted values: 1:1, 4:3, 3:4, 16:9, 9:16, 3:2, 2:3, auto.

Resolution

resolution: Required. Accepted values: 1K, 2K.

Advanced Parameters

Set model and optional callback_url at the request root. Place all workflow parameters, including output options, inside input. Send the input fields listed on this page.

Prompt

prompt: Required. Describe the desired image. Length: 3-5,000 characters.

Verified Example

This example was generated through the Vidgo API and is also the default example in the playground. Source and result images are hosted on the Vidgo CDN. Tide Pool Field Notebook

{
  "code": 200,
  "data": {
    "task_id": "SBR3R4D3GOFPXM1Z",
    "status": "finished",
    "files": [
      {
        "file_type": "image",
        "file_url": "https://cdn.vidgo.ai/apis/models/blackforestlabs/flux-2-flex/text-to-image/v1/02/output.jpg"
      }
    ],
    "created_time": "2026-09-26T11:07:50",
    "error_message": null,
    "progress": 100
  }
}

Authorizations

Authorization

string

header

required

Use VIDGO_API_KEY.

Body

application/json

Keep model and callback_url at the root. Place workflow parameters inside input.

model

string

required

Example:

"blackforestlabs/flux-2-flex/text-to-image"

input

object

required

Show child attributes

callback_url

string | null

Optional public HTTP(S) endpoint for task completion notifications. HTTPS is recommended. Omit, use null, or use an empty string to disable callbacks.

Response

Task submitted

code

enum<integer>

required

Available options:

200

data

object

required

Show child attributes

​Models

​Features

​Output Options

​Image Size

​Resolution

​Advanced Parameters

​Prompt

​Verified Example

Authorizations

Body

Response

Models

Features

Output Options

Image Size

Resolution

Advanced Parameters

Prompt

Verified Example