ImageKleinStart creating| FLUX 3 Image Klein | FLUX.2 [klein] 9B | FLUX.2 [klein] 4B | |
|---|---|---|---|
| Released | Oct 15, 2026 | Jan 15, 2026 | Jan 15, 2026 |
| Generator size | 5.6B | 9B | 4B |
| Native 4K | Yes | — | — |
| Bounding boxes | Yes | — | — |
| Reference images | Up to 10 | not documented at the same level | |
| Quality (BFL Elo vs 9B) | +91 text-to-image, +70 editing | baseline | — |
| API price | $0.009 (1K) – $0.036 (4K) | $0.015 / image | $0.014 / image |
| License | FLUX Kommunity (free commercial under $5M) | FLUX Non-Commercial | Apache-2.0 |
| Minimum VRAM (BFL) | 8 GB (INT8) | ≈13 GB quoted at launch | |
FLUX.2 [klein] figures from BFL's API release notes (January 2026); “—” means the feature wasn't part of that model's documented feature set.
Should you switch?
- Yes for quality, 4K, layout control or multi-image composition — and for commercial use if you're under $5M revenue (9B was non-commercial).
- Maybe not if you depend on the Apache-2.0 license of FLUX.2 [klein] 4B (for example, a large company self-hosting), or on existing FLUX.2 LoRAs — they don't carry over to a new architecture.