---
id: "black-forest-labs/flux-3-image-klein"
also: ["black-forest-labs/flux-3-image-klein-20261015", "vercel/bfl/flux-3-image-klein"]
card_usd_per_m: "0.0 in, 0.0 out, at black-forest-labs"
context: 46864
max_output: 42177
input: ["text", "image"]
output: ["image"]
released: "2026-10-15"
api: ["/api/v1/images"]
params: ["max_tokens", "seed", "stop", "temperature"]
endpoints: 2
gateways: "openrouter (1), vercel (1)"
no_training: 1
trains: 0
retains_prompts: 1
---
# Black Forest Labs: FLUX 3 Image Klein

FLUX 3 Image Klein is Black Forest Labs’ smaller, faster image generation and editing model, with 5.6 billion parameters and open weights. It supports text-to-image generation, image editing, multiple reference images, and layouts specified with bounding boxes. The hosted API produces images across five resolution classes from 768 × 768 to 4K.