Feature Support
This page answers the practical question: which model families support which features today?
Quick Picks
| Need | Best Starting Point |
|---|---|
| LoRA adapters | FLUX.1, SDXL, or Qwen-Image |
| ControlNet | SD 1.5 |
| img2img at 1024 output | FLUX.1 or SDXL |
| broadest feature surface | SD 1.5 or SDXL |
| best prompt-following quality | FLUX.1 or SD 3.5 |
Source Image Workflows
| Family | img2img | Inpainting | Edit-family refs |
|---|---|---|---|
| FLUX.1 | Yes | Yes | No |
| SDXL | Yes | Yes | No |
| SD 1.5 | Yes | Yes | No |
| SD 3.5 | Yes | Yes | No |
| Z-Image | Yes | Yes | No |
| Flux.2 Klein | Yes | Yes | No |
| Wuerstchen v2 | Yes | Yes | No |
| Qwen-Image | Yes | Yes | No |
| Qwen-Image-Edit | No | No | Yes |
| LTX Video | Not yet | Not yet | Not yet |
| LTX-2 | Yes | No | Keyframes |
Control and Adapters
| Family | Internal family | ControlNet | LoRA |
|---|---|---|---|
| FLUX.1 | flux | No | Yes |
| Flux.2 Klein | flux2 | No | Yes |
| LTX-2 | ltx2 | No | Yes |
| SD 1.5 | sd15 | Yes | Yes |
| SD 3.5 | sd3 | No | Yes |
| SDXL | sdxl | No | Yes |
| Qwen-Image | qwen-image | No | Yes |
| Qwen-Image-Edit | qwen-image-edit | No | Yes |
| Z-Image | z-image | No | Yes |
| Wuerstchen v2 | wuerstchen | No | No |
| LTX Video | ltx-video | No | No |
Prompt Conditioning
| Family | Negative Prompts | Scheduler Override |
|---|---|---|
| FLUX.1 | No | No |
| SDXL | Yes | Yes |
| SD 1.5 | Yes | Yes |
| SD 3.5 | Yes | No |
| Z-Image | No | No |
| Flux.2 Klein | No | No |
| Wuerstchen v2 | Yes | No |
| Qwen-Image | Yes | No |
| Qwen-Image-Edit | Yes | No |
| LTX Video | No | No |
Video Generation
| Family | txt2vid | img2vid | audio2vid | keyframe | retake | IC-LoRA | audio track |
|---|---|---|---|---|---|---|---|
| LTX Video | Yes | Not yet | No | No | No | No | No |
| LTX-2 | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| All others | No | No | No | No | No | No | No |
LTX Video defaults to APNG (lossless, metadata-rich). LTX-2 defaults to MP4 so it can preserve synchronized audio when requested. Both families also support GIF, and feature-gated WebP/MP4 outputs where applicable. Use --format apng|gif|webp|mp4. Frame count must be 8n+1 (9, 17, 25, 33, ...). Dimensions must be multiples of 32.
The recommended LTX default today is ltx-video-0.9.6-distilled:bf16. The 0.9.8 family is available, pulls its spatial upscaler asset, and now runs the full multiscale refinement path.
Backend Support
| Family | CUDA | Metal | CPU |
|---|---|---|---|
| FLUX.1 / FLUX.2 | Yes | Yes | Yes (slow) |
| SDXL / SD 1.5 | Yes | Yes | Yes |
| SD 3.5 | Yes | Yes | Yes |
| Z-Image | Yes | Yes | Yes |
| Wuerstchen v2 | Yes | Yes | Yes |
| Qwen-Image | Yes | Yes | Yes |
| Qwen-Image-Edit | Yes | Yes | Yes |
| LTX Video | Yes | Yes | Yes |
| LTX-2 | Yes | Not yet | Correctness-only |
LTX-2 is CUDA-only for real generation
LTX-2 / LTX-2.3 does not support Apple Metal in this release. The native runtime runs on CUDA; the CPU path exists for correctness-oriented coverage and can be extremely slow. On macOS you can still use every other family through the Metal backend — LTX-2 is the only family that is currently CUDA-gated.
Notes
- ControlNet is currently available only for SD 1.5.
- LoRA-capable families are
flux,flux2,ltx2,sd15,sd3,sdxl,qwen-image,qwen-image-edit, andz-image. Wuerstchen and LTX Video are not wired for LoRA yet. - LTX-2 adds stacked LoRAs plus camera-control presets for the published 19B adapters.
--schedulerapplies only to SD 1.5 and SDXL.- Negative prompts are meaningful for CFG-based families and ignored by FLUX, Z-Image, and Flux.2 Klein.
qwen-image-editis a distinct edit family, not a standard img2img mode.- The CLI and API support multiple ordered input images for
qwen-image-edit; the TUI keeps the edit flow to a single source image in v1. qwen-image-editcan use quantized--qwen2-variantlanguage weights while still loading the Qwen2.5-VL vision tower for image conditioning.- LTX-2 now wires
x2spatial upscaling across the family,x1.5spatial upscaling forltx-2.3-*, andx2temporal upscaling in the native runtime. - LTX-2's native CUDA path is validated across text+audio-video, image-to-video, audio-to-video, keyframe, retake, public IC-LoRA, spatial upscale, and temporal upscale workflows.
- LTX-2 is CUDA-only for real generation: CPU is correctness-only, and Metal is not supported in this release.
For model size and VRAM fit, see Models Overview. For usage examples, see Generating Images.