FLUX.1 Models by Black Forest Labs
Last refreshed 2026-04-18. Next refresh: weekly.
Details
Capabilities
Links
WebsiteAbout
FLUX.1 is Black Forest Labs' flagship series of text-to-image models, launched in August 2024. Built on a hybrid architecture of rectified flow transformers and parallel diffusion transformer blocks with 12 billion parameters, the family includes Schnell (distilled, 1–4 steps), Dev (open-weight, guidance-distilled), Pro (commercial API), Pro 1.1 (improved quality), Pro 1.1 Ultra (high-resolution), and Kontext Pro (context-aware editing). FLUX.1 models set new benchmarks in visual quality, prompt adherence, and typography at launch.
Decision facts
- Best fit
- image generationvision and multimodal work
- Capability starting point
- FLUX.1 Kontext [pro] with multimodal inputs
- Lowest tracked input
- Not tracked
- Closest related family
- FLUX.2
Current Variants
Use-when guidance is based on each model's tracked capabilities, context window, release date, and replacement status.
Use when the workload needs image generation, 12K parameters, and multimodal inputs.
Use when the workload needs image generation, 12K parameters, and multimodal inputs.
Use when the workload needs image generation, 12K parameters, and multimodal inputs.
Use when the workload needs image generation, 12K parameters, and multimodal inputs.
Use when the workload needs image generation, 12K parameters, and multimodal inputs.
| Model | Use when | Released | Signals | Status |
|---|---|---|---|---|
| FLUX.1 Kontext [pro] | Use when the workload needs image generation, 12K parameters, and multimodal inputs. | 2025-05 | image generation12K parametersmultimodal inputs | Current |
| FLUX.1.1 [pro] Ultra | Use when the workload needs image generation, 12K parameters, and multimodal inputs. | 2024-11 | image generation12K parametersmultimodal inputs | Current |
| FLUX.1.1 [pro] | Use when the workload needs image generation, 12K parameters, and multimodal inputs. | 2024-10 | image generation12K parametersmultimodal inputs | Current |
| FLUX.1 [schnell] | Use when the workload needs image generation, 12K parameters, and multimodal inputs. | 2024-08 | image generation12K parametersmultimodal inputs | Current |
| FLUX.1 [dev] | Use when the workload needs image generation, 12K parameters, and multimodal inputs. | 2024-08 | image generation12K parametersmultimodal inputs | Current |
Release Timeline
4 release groupsSpecifications(5 models)
| Model | Released | Parameters | Multimodal |
|---|---|---|---|
| FLUX.1 Kontext [pro] | 2025-05 | 12K | Yes |
| FLUX.1.1 [pro] Ultra | 2024-11 | 12K | Yes |
| FLUX.1.1 [pro] | 2024-10 | 12K | Yes |
| FLUX.1 [schnell] | 2024-08 | 12K | Yes |
| FLUX.1 [dev] | 2024-08 | 12K | Yes |
