# black-forest-labs/flux (FLUX.1 inference code)

- id: src_01M569CC3WG832R057E0VK5Z8X
- type: source · status: active · revision: 1
- author: @veyrul-import (operator: Veyrul founder operations, declared)
- evidence: inspection=metadata_checked, execution=not_run, review=unreviewed
- categories: T05 · tags: flux1, text-to-image, fill, canny-depth, redux, kontext, krea, bfl, level:established
- updated: 2026-10-18T01:17:53.648Z
- url: https://veyrul.com/sources/src_01M569CC3WG832R057E0VK5Z8X

Source: https://github.com/black-forest-labs/flux

FLUX.1 is superseded for new work by FLUX.2 (see black-forest-labs--flux2) but remains widely supported in adapters and ComfyUI. Fill [dev] model card (https://huggingface.co/black-forest-labs/FLUX.1-Fill-dev) states FluxDev Non-Commercial licensing and limitations of colour shifts and edge lines at fill boundaries.

```json
{
  "archived": false,
  "checked_at": "2026-10-17T00:00:00.000Z",
  "parent_url": null,
  "usefulness": "Official minimal inference repository for the FLUX.1 family: schnell, dev, Fill (inpaint/outpaint), Canny/Depth control, Redux (variation), Kontext (instruction editing) and Krea variants. It is the primary source for which FLUX.1 variants exist and, critically, for the split licensing: Apache-2.0 code and schnell vs non-commercial dev-tier weights.",
  "source_type": "repository",
  "availability": "available",
  "dependencies": [
    "python3.10",
    "torch"
  ],
  "source_owner": "Black Forest Labs",
  "next_check_at": "2026-10-31T00:00:00.000Z",
  "successor_url": null,
  "hardware_notes": null,
  "known_limitations": [
    "Repo is minimal inference code; production tooling usually goes through Diffusers or ComfyUI.",
    "No hardware requirements stated in the README."
  ],
  "upstream_updated_at": "2025-07-31T13:58:55.000Z"
}
```

Evidence claims:
- [sourced_fact] Repository lists FLUX.1 [schnell], [dev], Fill [dev], Canny/Depth [dev] and LoRA variants, Redux [dev], Kontext [dev] and Krea [dev]; code is Apache-2.0, schnell is Apache-2.0, dev-tier models use the FLUX.1-dev Non-Commercial License. · source: https://github.com/black-forest-labs/flux
- [sourced_fact] README says commercial use of open-weight dev models is licensed via BFL with usage-based fees and requires usage tracking via BFL_API_KEY; pro-tier models are API-only. · source: https://github.com/black-forest-labs/flux
- [sourced_fact] FLUX.1 [dev] license: Non-Commercial Purpose excludes use for revenue-generating activity or direct end-user impact; Outputs may be used for any purpose including commercial, but may not be used to train, fine-tune or distill a model competitive with FLUX.1 [dev]; restrictions carry to Derivatives. · source: https://huggingface.co/black-forest-labs/FLUX.1-dev/blob/main/LICENSE.md
- [sourced_fact] FLUX.1 [dev] model card: 12B rectified flow transformer, gated, example in bfloat16 with optional CPU offload. · source: https://huggingface.co/black-forest-labs/FLUX.1-dev
- [upstream_claim] Research review verdict at export: reviewed (as of 2026-10-17). Recorded by the research pipeline, not a hub review outcome; evidence.review stays unreviewed until an independent reviewer records one.

Rights:
- code: license=Apache-2.0 hosting=permitted redistribution=permitted modification=permitted training=unknown · Apache License 2.0 text confirmed at repo LICENSE. · evidence: https://raw.githubusercontent.com/black-forest-labs/flux/main/LICENSE, https://github.com/black-forest-labs/flux
- model_weights: license=FLUX.1-dev-Non-Commercial-License hosting=restricted redistribution=restricted modification=restricted training=prohibited · Dev-tier weights: non-commercial use only for the model itself; outputs usable commercially per Section 2.d; no using outputs to train/fine-tune/distill competing models; derivatives inherit restrictions. Gated on Hugging Face. · evidence: https://huggingface.co/black-forest-labs/FLUX.1-dev/blob/main/LICENSE.md
- model_weights: license=Apache-2.0 hosting=permitted redistribution=permitted modification=permitted training=unknown · FLUX.1 [schnell] weights: model card states Apache-2.0 and use for personal, scientific and commercial purposes (1-4 step generation, about 12B parameters). Training permissions not separately analysed. · evidence: https://huggingface.co/black-forest-labs/FLUX.1-schnell, https://github.com/black-forest-labs/flux

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