---
title: "FLUX.2 Klein Playground & API | Made"
description: "Try FLUX.2 Klein in Made's playground or integrate it with one API key. 1 credit / image, priced before you run it."
url: https://www.made.app/playground/flux-2-klein
---

Image 1 credit / image

# FLUX.2 Klein

FLUX.2 Klein is the open-weight 4B tier of Black Forest Labs’ FLUX.2 family, generating images in under a second at 1 credit each — the cheapest way in Made to explore ideas in volume before a flagship pass.

[View docs](https://www.made.app/developers) [Model guide](https://www.made.app/models/flux-2-klein)

```
// Node.js. Running this creates one paid generation.
import { randomUUID } from 'node:crypto';
const base = "https://www.made.app/api";
const headers = {
  Authorization: `Bearer ${process.env.MADE_API_KEY}`,
  'Content-Type': 'application/json',
};
const input = {
  "model": "flux_2_klein",
  "prompt": "Victorian glass greenhouse full of palms and ferns, morning condensation on the panes, iron frame overhead. 35mm film still, soft natural light, muted earth tones with one moss green accent, shallow depth of field, subtle film grain, candid and unposed, no text, logos, or watermark.",
  "aspect_ratio": "1:1"
};

async function api(path, body) {
  const response = await fetch(base + path, {
    method: body ? 'POST' : 'GET', headers,
    ...(body && { body: JSON.stringify(body) }),
  });
  if (!response.ok) throw new Error(await response.text());
  return response.json();
}

const { cost } = await api('/v1/cost', input);
console.log('Quoted cents:', cost.customerCostCents);
// Preserve this request ID when retrying a submission.
const requestId = randomUUID();
let job = await api('/v1/generations', {
  ...input, request_id: requestId,
  max_cost_cents: cost.customerCostCents,
});
console.log('Request:', job.id);
while (!['succeeded', 'failed', 'canceled'].includes(job.status)) {
  await new Promise(resolve => setTimeout(resolve, 3000));
  job = await api('/v1/generations/' + job.id);
}
if (job.status !== 'succeeded') throw new Error(JSON.stringify(job.error || job.status));
console.log(job.result.assets);
```

## Input

Prompt

Aspect ratio

**Advanced settings**

seed output format

[Sign in to generate](https://www.made.app/login?returnUrl=%2Fplayground%2Fflux-2-klein%23playground)

Uses your credits. See the exact price before generating.

## Result

Example

![Victorian greenhouse full of palms and ferns generated with FLUX.2 Klein in Made](https://www.made.app/images/models/flux-2-klein/greenhouse.jpg)

FLUX.2 Klein: Glasshouse

## Price

1 credit / image. Check the exact cost for your settings before generating. Failed generations are refunded. [Full price sheet](https://www.made.app/price-sheet).

## More models by Black Forest Labs

Compare available models and their prices. The exact price depends on your settings.

| Model name | Price | Resolution | Duration |
| --- | --- | --- | --- |
| [FLUX 1.1 Pro](https://www.made.app/playground/flux-1.1-pro) | 4 credits / image | — | — |
| [FLUX 2 Pro](https://www.made.app/playground/flux-2-pro) | 3 credits / image | — | — |
| [FLUX.2 [pro] Outpaint](https://www.made.app/playground/flux-2-pro-outpaint) | Priced by input | — | — |
| [FLUX 3](https://www.made.app/playground/flux-3) | 17 credits / second | — | 5–20s |
| [FLUX Kontext Pro](https://www.made.app/playground/flux-kontext) | 4 credits / image | — | — |
| [FLUX Kontext Max](https://www.made.app/playground/flux-kontext-max) | 8 credits / image | — | — |
| [FLUX Kontext Object Removal](https://www.made.app/playground/flux-kontext-object-removal) | 4 credits / image | — | — |
| [FLUX Kontext Pro](https://www.made.app/playground/flux-kontext-pro) | 4 credits / image | — | — |
| [FLUX Kontext Text Removal](https://www.made.app/playground/flux-kontext-text-removal) | 4 credits / image | — | — |

---

Markdown version of https://www.made.app/playground/flux-2-klein. Every public Made page has one at its URL plus .md (https://www.made.app/playground/flux-2-klein.md). Site summary for AI assistants: https://www.made.app/llms.txt