---
title: Flux 2
description: "*Configuring Flux 2 in Source* **Pro** (you pay Black Forest Labs for usage). Flux 2 talks to **Black Forest Labs** directly. You need a BFL API key from [api.bfl.ai](https://api.bfl.ai) — **not** a Replicate token. It *generates* an image from your…"
url: "https://magic-post-thumbnail.com/docs/flux-2/"
updated: "2026-08-16"
category: Image Databases
---

# Flux 2

*Configuring Flux 2 in Source*

**Pro** (you pay Black Forest Labs for usage). Flux 2 talks to **Black Forest Labs** directly. You need a BFL API key from [api.bfl.ai](https://api.bfl.ai) — **not** a Replicate token. It *generates* an image from your keywords — it does not search a photo library.

Flux 2 Pro is the quality default. Klein 9B is faster and cheaper. Flux 1.x models stay on the [Replicate](https://magic-post-thumbnail.com/docs/replicate/) bank.

![Flux 2 (Pro) bank settings](https://magic-post-thumbnail.com/wp-content/uploads/2026/08/panel-flux2.png)

## Where to enable it

Open **Source**, add **Flux 2** (badge **AI**, locked as **Pro** on the free plugin) to the **Automatic generation chain**, then click **Configure**. Style presets on **Automatic → Image Placement** apply when this bank generates. The Gutenberg block cannot search Flux 2 (photo tabs only).

## Get an API key

Create a key on the [Black Forest Labs API](https://api.bfl.ai) site. Paste it in the Flux 2 panel and click **API testing**. A Replicate token will not work here.

## Options

- **API Key** — Required. Your Black Forest Labs (BFL) key.
- **Model** — Flux 2 Pro (default, higher quality) or Flux 2 Klein 9B (faster and cheaper).
- **Aspect Ratio** — 1:1, 16:9 (default) or 9:16.

## Time, billing and restrictions

**Caution:** generation is asynchronous and can take **10 to 60 seconds**.

Previewing this bank on Source consumes BFL credits — the plugin warns you and asks for confirmation before an AI preview. The plugin does not charge per image. Black Forest Labs bills the key you enter.