FLUX.1 Dev API

blackforestlabs/flux-dev
Development-oriented FLUX.
Output
$0.0325 / gen (variable)
Released
Jun 12, 2026

How to use FLUX.1 Dev API

Install any OpenAI-compatible SDK, point it at api.aimlapi.com/v1, and set the model to blackforestlabs/flux-dev.
import requests

r = requests.post(
    "https://api.aimlapi.com/v1/images/generations",
    headers={"Authorization": "Bearer " + AIMLAPI_KEY},
    json={
      "model": "blackforestlabs/flux-dev",
      "prompt": "A cat holding a sign that says hello"
    },
)
print(r.json())
const r = await fetch("https://api.aimlapi.com/v1/images/generations", {
  method: "POST",
  headers: {
    Authorization: `Bearer ${process.env.AIMLAPI_KEY}`,
    "Content-Type": "application/json",
  },
  body: JSON.stringify({
    "model": "blackforestlabs/flux-dev",
    "prompt": "A cat holding a sign that says hello"
  }),
});
console.log(await r.json());
curl -X POST https://api.aimlapi.com/v1/images/generations \
  -H "Authorization: Bearer $AIMLAPI_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model":"blackforestlabs/flux-dev","prompt":"A cat holding a sign that says hello"}'

OpenAI-compatible — swap the base URL and it works with your existing SDK.

FLUX.1 Dev API Pricing

TypePrice
Output
$0.0325 / gen (variable)

FLUX.1 Dev Benchmarks

BenchmarkScoreWhat it measuresSourceRetrieved
Text-to-Image Arena
841
Human preference Elo from blind pairwise comparisons of generated images, measured independently by Artificial AnalysisSourceSeptember 28, 2026

FLUX.1 Dev vs other models

ModelInputOutputContextBest for
FLUX.1 Dev
This page
$0.0325 / gen (variable)
Image generation at scale
$0.325 / 1M tokens
$78 / 1M tokens
128K tokens
Image generation at scale
$6.5 / 1M tokens
$39 / 1M tokens
Image generation at scale
Image generation at scale
$0.0195 / MP (variable)
Image generation at scale

Frequently asked questions

FLUX.1 Dev takes image, text as input and returns image.

FLUX.1 Dev became available on June 12, 2026.

FLUX.1 Dev is priced at $0.0325 / gen (variable).

FLUX.1 Dev is billed per generation — a fixed charge per output rather than by prompt length.

Yes, FLUX.1 Dev accepts image input as well as a text prompt.

FLUX.1 Dev was built by Black Forest Labs.

Send a request to https://api.aimlapi.com/v1/images/generations with blackforestlabs/flux-dev as the model id.

Yes. FLUX.1 Dev is served through AI/ML API, so the same key and endpoint format used for other models applies.

It is a development-oriented image generation model from the FLUX.1 family, built for generating images from text prompts.

Start building with FLUX.1 Dev

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