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What AI models does FLUX use?
FLUX runs on FLUX 1.1 [pro] (Black Forest Labs), FLUX 3 (Black Forest Labs), FLUX.1 [dev] (Black Forest Labs), FLUX.1 [pro] (Black Forest Labs), FLUX.1 Kontext (Black Forest Labs), FLUX.2 (Black Forest Labs), FLUX.2 [dev] (Black Forest Labs), FLUX.2 [flex] (Black Forest Labs), FLUX.2 [klein] (Black Forest Labs), FLUX.2 [klein] 9B (Black Forest Labs), FLUX.2 [max] (Black Forest Labs), FLUX.2 [pro] (Black Forest Labs) and FLUX1.1 [pro] Ultra (Black Forest Labs), and routes requests between them.
- Models used
- 13
- Primary model
- FLUX 1.1 [pro]
- Public API
- Yes
- Last checked
- 2026-09-09
Model claims are labelled by how we know them: FLUX 1.1 [pro] — disclosed, FLUX 3 — disclosed, FLUX.1 [dev] — disclosed, FLUX.1 [pro] — disclosed, FLUX.1 Kontext — disclosed, FLUX.2 — disclosed, FLUX.2 [dev] — disclosed, FLUX.2 [flex] — disclosed, FLUX.2 [klein] — disclosed, FLUX.2 [klein] 9B — disclosed, FLUX.2 [max] — disclosed, FLUX.2 [pro] — disclosed and FLUX1.1 [pro] Ultra — disclosed. "Disclosed" means the vendor says so in public; "inferred" means it was derived from documentation, headers or release notes.
Context window: n/a.
Other stack signals: c++, python and pytorch.
Cite this answer
Tomorrow. “What AI models does FLUX use?” Tomorrow AI & Emerging Tech Index, AlienSquad, updated 2026-09-09. https://tomorrow.aliensquad.ai/q/what-models-does-flux-use
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