black-forest-labs

Black Forest Labs: FLUX.2 Pro

black-forest-labs/flux.2-pro

A FLUX.2 image-generation candidate for evaluating a prompt or a reference-image workflow. Review the current provider's reference count and aspect-ratio constraints before generating.

image

Try in Playground ↗

Provider-supported parameters

These are upstream capabilities. Jevrouter supports the subset described in the API contract; chat input is currently text only.

nseedaspect_ratiooutput_formatinput_references

Capabilities are imported from OpenRouter’s catalog. This does not mean every model has been independently tested by Jevrouter.

Catalog updated: 2026-09-22T08:51:50.371Z · Price version: cmub11avk00wzr82g0bgmcxiv:1

Image prices & options

Prices use each provider’s billing unit. We reserve a conservative amount and settle from the usage receipt, releasing unused balance.

Black Forest Labs

Usage	Unit	USD	Variant
output image	megapixel	$0.03	Default

{
  "n": {
    "type": "range",
    "min": 1,
    "max": 1
  },
  "seed": {
    "type": "boolean"
  },
  "aspect_ratio": {
    "type": "enum",
    "values": [
      "1:1",
      "4:3",
      "3:4",
      "3:2",
      "2:3",
      "16:9",
      "9:16",
      "21:9",
      "auto"
    ]
  },
  "output_format": {
    "type": "enum",
    "values": [
      "png",
      "jpeg"
    ]
  },
  "input_references": {
    "type": "range",
    "min": 0,
    "max": 8
  }
}

JEVROUTER INTEGRATION NOTES · REVIEWED 2026-09-22

What to check in your application

Reference images add input usage where listed in the endpoint pricing table.
Keep the same aspect ratio and intended output size when comparing provider receipts.

Start with the example below, then test representative inputs against your own acceptance criteria.

Make a request

Some models require reference images. Check the input_references range above. Images return base64 data and a usage receipt.

curl --no-buffer https://api.jevrouter.io/v1/images \
  -H "Authorization: Bearer $JEVROUTER_API_KEY" \
  -H "Content-Type: application/json" \
  -d @- <<'JSON'
{
  "model": "black-forest-labs/flux.2-pro",
  "prompt": "A ceramic cup on a wooden table beside a window, soft natural light, simple product photograph.",
  "n": 1,
  "stream": true
}
JSON

Plan your integration

Generate and save images with Python →Estimate this model’s cost →Budgets, request status and safe retries →

Related models to evaluate

Use identical inputs and scoring rules. No ranking is implied by this selection.

Black Forest Labs: FLUX.2 Klein 4B Google: Nano Banana Pro (Gemini 3 Pro Image Preview)

Source: OpenRouter model catalog. Imported descriptions and capabilities are provider declarations, not independent benchmark results. Jevrouter currently uses OpenRouter as its managed upstream.