Flux 2 Turbo: High-Fidelity Text-to-Image Generation on playground and API | RunComfy

blackforestlabs/flux-2/turbo/text-to-image

Generate high-fidelity, high-speed images from text prompts with precision control, multi-reference styling, and production-ready quality for brand visuals, product mockups, and character design.

1. Get started

Use RunComfy's API to run blackforestlabs/flux-2/turbo/text-to-image. For accepted inputs and outputs, see the model's schema.

curl --request POST \
  --url https://model-api.runcomfy.net/v1/models/blackforestlabs/flux-2/turbo/text-to-image \
  --header "Content-Type: application/json" \
  --header "Authorization: Bearer <token>" \
  --data '{
    "prompt": "> `Final prompt:` A photorealistic image of a white ceramic teacup lying on its side on a wrinkled, light gray fabric background. The teacup is filled with dried yellow flowers, with small clustered blossoms and brittle stems emerging from the rim. The flowers spill out naturally, maintaining an organic arrangement. The lighting is soft and diffused, typical of natural window light on an overcast day, creating subtle shadows and highlights on the fabric and cup. The scene is minimalistic and thoughtfully composed, evoking a calm, rustic atmosphere. The camera angle is slightly overhead with a gentle tilt, capturing the full cup at a diagonal orientation, and showing the handle at the bottom right. The photographic style is moody and still-life inspired, focusing on color contrast between the pale background and the muted yellow blossoms. Rendered in ultra-high resolution, 8k, with fine detail, realistic textures, and soft focus depth."
  }'

2. Authentication

Set the YOUR_API_TOKEN environment variable with your API key (manage keys in your Profile) and include it on every request as a Bearer token via the Authorization header: Authorization: Bearer $YOUR_API_TOKEN.

3. API reference

Submit a request

Submit an asynchronous generation job and immediately receive a request_id plus URLs to check status, fetch results, and cancel.

curl --request POST \
  --url https://model-api.runcomfy.net/v1/models/blackforestlabs/flux-2/turbo/text-to-image \
  --header "Content-Type: application/json" \
  --header "Authorization: Bearer <token>" \
  --data '{
    "prompt": "> `Final prompt:` A photorealistic image of a white ceramic teacup lying on its side on a wrinkled, light gray fabric background. The teacup is filled with dried yellow flowers, with small clustered blossoms and brittle stems emerging from the rim. The flowers spill out naturally, maintaining an organic arrangement. The lighting is soft and diffused, typical of natural window light on an overcast day, creating subtle shadows and highlights on the fabric and cup. The scene is minimalistic and thoughtfully composed, evoking a calm, rustic atmosphere. The camera angle is slightly overhead with a gentle tilt, capturing the full cup at a diagonal orientation, and showing the handle at the bottom right. The photographic style is moody and still-life inspired, focusing on color contrast between the pale background and the muted yellow blossoms. Rendered in ultra-high resolution, 8k, with fine detail, realistic textures, and soft focus depth."
  }'

Monitor request status

Fetch the current state for a request_id ("in_queue", "in_progress", "completed", or "cancelled").

curl --request GET \
  --url https://model-api.runcomfy.net/v1/requests/{request_id}/status \
  --header "Authorization: Bearer <token>"

Retrieve request results

Retrieve the final outputs and metadata for the given request_id; if the job is not complete, the response returns the current state so you can continue polling.

curl --request GET \
  --url https://model-api.runcomfy.net/v1/requests/{request_id}/result \
  --header "Authorization: Bearer <token>"

Cancel a request

Cancel a queued job by request_id, in-progress jobs cannot be cancelled.

curl --request POST \
  --url https://model-api.runcomfy.net/v1/requests/{request_id}/cancel \
  --header "Authorization: Bearer <token>"

4. File inputs

Hosted file (URL)

Provide a publicly reachable HTTPS URL. Ensure the host allows server‑side fetches (no login/cookies required) and isn't rate‑limited or blocking bots. Recommended limits: images ≤ 50 MB (~4K), videos ≤ 100 MB (~2–5 min @ 720p). Prefer stable or pre‑signed URLs for private assets.

5. Schema

Input schema

{
  "type": "object",
  "title": "Input",
  "required": [
    "prompt"
  ],
  "properties": {
    "prompt": {
      "title": "Prompt",
      "description": "",
      "type": "string",
      "default": "> `Final prompt:` A photorealistic image of a white ceramic teacup lying on its side on a wrinkled, light gray fabric background. The teacup is filled with dried yellow flowers, with small clustered blossoms and brittle stems emerging from the rim. The flowers spill out naturally, maintaining an organic arrangement. The lighting is soft and diffused, typical of natural window light on an overcast day, creating subtle shadows and highlights on the fabric and cup. The scene is minimalistic and thoughtfully composed, evoking a calm, rustic atmosphere. The camera angle is slightly overhead with a gentle tilt, capturing the full cup at a diagonal orientation, and showing the handle at the bottom right. The photographic style is moody and still-life inspired, focusing on color contrast between the pale background and the muted yellow blossoms. Rendered in ultra-high resolution, 8k, with fine detail, realistic textures, and soft focus depth."
    },
    "guidance_scale": {
      "title": "Guidance Scale",
      "description": "Guidance Scale is a measure of how close you want the model to stick to your prompt when looking for a related image to show you.",
      "type": "float",
      "minimum": 0,
      "maximum": 20,
      "default": 2.5
    },
    "seed": {
      "title": "Seed",
      "description": "",
      "type": "integer",
      "default": 0
    },
    "image_size": {
      "title": "Image Size",
      "description": "",
      "type": "string",
      "enum": [
        "square_hd",
        "square",
        "portrait_4_3",
        "portrait_16_9",
        "landscape_4_3",
        "landscape_16_9"
      ],
      "default": "landscape_4_3"
    },
    "output_format": {
      "title": "Output Format",
      "description": "The format of the generated image.",
      "type": "string",
      "enum": [
        "jpeg",
        "png",
        "webp"
      ],
      "default": "png"
    }
  }
}

Output schema

{
  "output": {
    "type": "object",
    "properties": {
      "image": {
        "type": "string",
        "format": "uri",
        "description": "single image URL"
      },
      "video": {
        "type": "string",
        "format": "uri",
        "description": "single video URL"
      },
      "images": {
        "type": "array",
        "description": "multiple image URLs",
        "items": { "type": "string", "format": "uri" }
      },
      "videos": {
        "type": "array",
        "description": "multiple video URLs",
        "items": { "type": "string", "format": "uri" }
      }
    }
  }
}
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