Image

Flux Kontext Pro image

Flux Kontext Pro — text-to-image with optional in-context editing from 1 reference. Ratios up to 21:9.

Category: Create · flux-kontext-pro

How to use & limits

• Text-to-image with optional in-context editing from 1 reference.
• prompt required.
• size sets the aspect ratio, ratios up to 21:9: 1:1, 4:3, 3:4, 16:9, 9:16, 21:9, 9:21.
• output_format: png or jpg.
• Accepts at most 1 reference image.

Capabilities

What this model supports, straight from the schema — no pricing, no infrastructure detail.

Parameters

Fields accepted in params (or first-class, where applicable) for POST /generations.

Example request

curl -X POST https://caranguejo.art/api/v1/dev/generations \
  -H "Authorization: Bearer $CK" \
  -H "Content-Type: application/json" \
  -d '{
  "model": "flux-kontext-pro",
  "prompt": "Ultra-wide city scene at dusk, neon reflected on wet asphalt.",
  "params": {
    "size": "21:9",
    "output_format": "png"
  }
}'

const res = await fetch("https://caranguejo.art/api/v1/dev/generations", {
  method: "POST",
  headers: {
    "Authorization": "Bearer " + process.env.CK,
    "Content-Type": "application/json",
  },
  body: JSON.stringify({
    "model": "flux-kontext-pro",
    "prompt": "Ultra-wide city scene at dusk, neon reflected on wet asphalt.",
    "params": {
      "size": "21:9",
      "output_format": "png"
    }
  }),
});
const { data } = await res.json();

Example response

{
  "id": "9f0c1a7e-…",
  "object": "generation",
  "model": "flux-kontext-pro",
  "type": "image",
  "status": "completed",
  "output": {
    "assets": [
      {
        "url": "https://media.caranguejo.art/outputs/example.png",
        "type": "image"
      }
    ],
    "images": [
      {
        "url": "https://media.caranguejo.art/outputs/example.png"
      }
    ]
  }
}

Common errors for this job type: