flux-2-klein-4b

Name: flux-2-klein-4b
Author: Cloudflare Workers AI

imagepreviewapache-2.04B

Lightweight 4B-parameter FLUX.2 flow model for sub-second inference; ~13 GB VRAM. Open base weights under Apache 2.0.

Capabilities

Show unsupported (14)

Infrastructure

Streaming

Fine-tuning

Model ID@cf/black-forest-labs/flux-2-klein-4b

Family—

Licenseapache-2.0

Statuspreview

Typeimage

Input modalitiestext

Output modalitiesimage

Open weight—

Parameters4B

Architecture—

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Release date2026-01-20

Sourceofficial

GET/v1/models/cloudflare-workers-ai/@cf/black-forest-labs/flux-2-klein-4b