FLUX.2-klein-4B · nearai

The FLUX.2 [klein] model family are our fastest image models to date. FLUX.2 [klein] unifies generation and editing in a single compact architecture, delivering state-of-the-art quality with end-to-end inference in as low as under a second. Built for applications that require real-time image generation without sacrificing quality.

Base model All models on this base All models of the provider to the provider

Input, $/1M $0.012 / image

Output, $/1M $1.00

Price, $ $0.012 / image

Context 128 000

Max output 1

Accepts text

Last checked 04.11.2026 12:00:14 UTC

Source provider's page

Price alerts

API

OpenAI-compatible API: the official OpenAI SDKs work with this base URL. Replace YOUR_API_KEY with your key from the provider.

API base URL	`https://cloud-api.near.ai/v1`
Endpoint	`https://cloud-api.near.ai/v1/images/generations`
Model id	`black-forest-labs/FLUX.2-klein-4B`

curl

curl https://cloud-api.near.ai/v1/images/generations \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model": "black-forest-labs/FLUX.2-klein-4B", "prompt": "a lighthouse at sunset", "n": 1, "size": "1024x1024"}'

Python

import requests

r = requests.post(
    "https://cloud-api.near.ai/v1/images/generations",
    headers={"Authorization": "Bearer YOUR_API_KEY"},
    json={
      "model": "black-forest-labs/FLUX.2-klein-4B",
      "prompt": "a lighthouse at sunset",
      "n": 1,
      "size": "1024x1024"
    },
)
print(r.json())

JavaScript

const r = await fetch("https://cloud-api.near.ai/v1/images/generations", {
  method: "POST",
  headers: {Authorization: "Bearer YOUR_API_KEY", "Content-Type": "application/json"},
  body: JSON.stringify({
    "model": "black-forest-labs/FLUX.2-klein-4B",
    "prompt": "a lighthouse at sunset",
    "n": 1,
    "size": "1024x1024"
  }),
});
console.log(await r.json());

Request (JSON)

{
  "model": "black-forest-labs/FLUX.2-klein-4B",
  "prompt": "a lighthouse at sunset",
  "n": 1,
  "size": "1024x1024"
}

Response (JSON)

{
  "created": 1760000000,
  "data": [
    {
      "url": "https://...",
      "b64_json": null
    }
  ]
}

The address is taken from the provider's model list; check it against the provider's documentation.

Provider's API documentation

Source: AI Rate Card, https://airatecard.com/en/c/offer%3Anearai%7Cblack-forest-labs/FLUX.2-klein-4B, prices checked 2026-11-04; seller's page: https://near.ai/models/black-forest-labs/FLUX.2-klein-4B

Technical details

ID: offer:nearai|black-forest-labs/FLUX.2-klein-4B