12B-scale rectified flow transformer
The model card describes a 12 billion parameter rectified flow transformer for text-to-image generation, matching about 11.9B captured parameters.
Open Source Model Profile · black-forest-labs
FLUX.1-dev
FLUX.1-dev is a black-forest-labs text-to-image model described as a 12B rectified flow transformer. Captured metadata reports about 11.9B parameters.
- Publisher
- black-forest-labs
- Task
- text-to-image
- Model type
- Unknown
- License
- flux-1-dev-non-commercial-license
- Library
- diffusers
- Publication status
- Accepted · not indexed
Model overview
FLUX.1-dev is published by black-forest-labs as a text-to-image model. The model card describes a 12 billion parameter rectified flow transformer for image generation from text, while captured Safetensors metadata records 11,901,408,320 parameters. The record is associated with the diffusers library and FluxPipeline usage.
Recorded capabilities
Guidance-distilled diffusers workflow
According to the model card, guidance distillation makes the model more efficient, and the documented workflow uses diffusers FluxPipeline with bfloat16 weights and model CPU offload.
Non-commercial output terms
The model card says generated outputs can be used for personal, scientific, and commercial purposes under the FLUX.1-dev Non-Commercial License.
API and ComfyUI access paths
According to the model card, API access is documented through bfl.ml, replicate.com, fal.ai, and mystic.ai, with ComfyUI support for local inference.
Use cases in the source record
- Text-to-image generation from written descriptions using the documented FluxPipeline workflow.
- Local image-generation experiments in ComfyUI with node-based workflows, as documented in the model card.
Limitations and unknowns
- No evaluation results were extracted from this record.
- No context-window value was extracted from this record.
- Provider state is historical snapshot data and should be refreshed before being presented as current availability.
- Quality and prompt-following characterizations come from the publisher model card and have not been independently measured by Ethen.
Source and provenance
Source: black-forest-labs/FLUX.1-dev
Captured: Unknown. Processed: 2026-09-07T19:34:41.864773+00:00.
FLUX.1 [dev] is a 12 billion parameter rectified flow transformer capable of generating images from text descriptions. For more information, please read our blog post . Key Features Cutting-edge output quality, second only to our state-of-the-art model FLUX.1 [pro] . Competitive prompt following, matching the performance of closed source alternatives . Trained using guidance distillation, making FLUX.1 [dev] more efficient. Open weights to drive new scientific research, and empower artists to develop innovative workflows. Generated outputs can be used for personal, scientific, and commercial purposes as described in the FLUX.1 [dev]…
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