Flux pro 1.1 ultra API

blackforestlabs/flux-pro-1.1-ultra
Flux 1.1 Pro Ultra is a high-speed AI image generator optimized for diverse applications.
Output
$0.078 / gen (variable)
Released
Jun 12, 2026

How to use Flux pro 1.1 ultra API

Install any OpenAI-compatible SDK, point it at api.aimlapi.com/v1, and set the model to blackforestlabs/flux-pro-1.1-ultra.
import requests

r = requests.post(
    "https://api.aimlapi.com/v1/images/generations",
    headers={"Authorization": "Bearer " + AIMLAPI_KEY},
    json={
      "model": "blackforestlabs/flux-pro-1.1-ultra",
      "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-pro-1.1-ultra",
    "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-pro-1.1-ultra","prompt":"A cat holding a sign that says hello"}'

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

Flux pro 1.1 ultra API Pricing

TypePrice
Output
$0.078 / gen (variable)

Flux pro 1.1 ultra vs other models

ModelInputOutputContextBest for
$0.078 / 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 pro 1.1 ultra takes image, text as input and returns image.

Flux pro 1.1 ultra became available on June 12, 2026.

Flux pro 1.1 ultra is priced at $0.078 / gen (variable).

Flux pro 1.1 ultra is billed per generation — a fixed charge per output rather than by prompt length.

Yes, Flux pro 1.1 ultra accepts image input as well as a text prompt.

Flux pro 1.1 ultra was built by Black Forest Labs.

Send a request to https://api.aimlapi.com/v1/images/generations with blackforestlabs/flux-pro-1.1-ultra as the model id.

Yes. Flux pro 1.1 ultra is served through AI/ML API, so the same key and endpoint format used for other models applies.

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