model · Black Forest Labs
FLUX.2
FLUX.2 (Black Forest Labs, the team behind the original Stable Diffusion) is a frontier image family released November 2025 and split into four tiers by openness: klein (added January 2026 — a 4B model under Apache 2.0, fully free and commercially unrestricted, runs on a single consumer GPU like an RTX 3090/4070), dev (a 32B open-weight model that needs a paid commercial license to use beyond research), and flex/pro/max (proprietary, API-only, the sharpest photorealism and multi-image editing). That spread — a genuinely free Apache-2.0 tier all the way up to an enterprise API — makes it the natural "which one is actually free" answer among the closed frontier vendors, and it runs natively in ComfyUI from day one. Its standout capability is multi-reference editing: feed it several reference images and one instruction, and it composes a single coherent edit.
What it can help with
- open-weight diffusion
- apache licensed model
- consumer gpu inference
- multi reference edit
- comfyui node graph
- frontier image generation
- api per-megapixel pricing