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 |
| Wan Video | Not yet | Not yet | Not yet |
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 |
| Wan Video | wan | No | Yes |
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 |
| Wan Video | Yes | No |
Video Generation
| Family | txt2vid | img2vid | audio2vid | keyframe | retake | lip dub | IC-LoRA | audio track |
|---|---|---|---|---|---|---|---|---|
| LTX Video | Yes | Not yet | No | No | No | No | No | No |
| LTX-2 | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| Wan Video | Yes | Yes | No | First/last | No | No | No | No |
| All others | No | No | No | No | No | No | No | No |
LTX Video, LTX-2, and Wan all default to MP4 — LTX-2 so it can preserve synchronized audio when requested; Wan renders video only and has no audio path. A build compiled without the mp4 feature falls back to APNG. GIF and APNG remain available for all three families, plus feature-gated WebP. Use --format apng|gif|webp|mp4. Wan keyframing is first/last-frame interpolation only (--image + --last-image); other keyframe layouts are refused at admission. Frame grids are per family: LTX Video and LTX-2 take 8n+1 frame counts (9, 17, 25, 33, ...) with dimensions in multiples of 32 — 64 for LTX-2 lip dub, which always renders in two stages and takes its frame count and rate from the reference clip. Wan takes 4n+1 frame counts (49, 53, 81, ...) with dimensions in multiples of 16, except wan22-ti2v-5b, whose 2.2 VAE requires multiples of 32.
The --output extension outranks those family defaults: mold run … -o clip.gif writes a real GIF even where the family would have picked MP4. An extension this binary cannot encode — .mp4 without the mp4 feature, .webp without webp — is refused before any weight is read rather than filled with another container's bytes, and an explicit --format that disagrees with the filename is reported instead of silently overriding it. --output - writes to stdout and claims no extension, so it keeps whatever container the family resolved.
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 | Yes | Correctness-only |
| Wan Video | Yes | Correctness-only | Correctness-only |
LTX-2 Metal qualification
LTX-2 / LTX-2.3's Apple Metal path is performance-qualified: BF16 transformer compute, fused attention, streamed FP8 lookup-table widening, and temporal VAE chunks, measured end-to-end on the 19B and 22B distilled FP8 tiers on Apple Silicon. Metal remains slower than a comparable CUDA card — streaming trades speed for fitting the model in unified memory.
Wan Video's Metal path is correctness-qualified (family-scoped BF16, chunked attention; fp8-scaled Wan checkpoints are refused on Metal), pending performance UAT.
Native app surfaces
Both native apps use the family capabilities above and the same generation request contract. Their platform roles differ intentionally:
| Area | Desktop | iPhone |
|---|---|---|
| Engine | Built-in local engine plus remote hosts | Remote hosts only |
| Create | Capability-driven image/video controls, review-first prepared expansion batches, estimates | Same exact-N, frozen-host review lifecycle and independent siblings, full-screen Advanced sheet, optimized for touch |
| Library | Unified local/remote grid with persisted top-bar thumbnail sizing, host filters, deduplication, batch provenance, History drawer, and desktop file actions | Merged saved-host library with persisted pinch-to-resize thumbnail sizing, Prints/Collections/Trash scopes, favorites/tag chips, titles via the viewer Info sheet, per-host trash retention on host detail, batch/source provenance, full-screen image/video, swipe navigation, Use as prompt, and Use as source |
| Models | Installed/Discover, kind and explicit 18+ NSFW badges, rich detail, install onto any machine still missing the model (Repair once all have it), download progress | Installed/live union, matching kind/18+ badges and detail, same install-or-repair host picker, pull progress, cancel, load/unload/remove |
| Machines | This device plus remembered/discovered remote hosts, host detail, automatic routing choices | Bonjour, IP/DNS/HTTPS, or Tailscale MagicDNS; explicit generation host and detailed telemetry |
| Queue | Shared multi-host console: live progress, per-job cancel, Pause/Resume, and drag-reorder (queue.can_reorder) | Per-host queue with progress and per-job cancel |
| Settings | Single column: Appearance, Updates, About, a Hosts link into Machines, and collapsed performance/generation/accounts/advanced sections | Mold Studio families (Mold/Safelight), System/Dark/Light, remote-host shortcut, version, and TestFlight update channel |
| Sequences | Output setting inside Create, clip rail with named seams, exact-host Validate plan, in-place editing of a finished sequence, Library ▸ History ▸ Sequences, TOML authoring, RunPod provisioning (inside Machines) | Same Output setting and clip list with exact-host Validate plan and durable recovery; no in-place editing, Sequences history tab, TOML editor, or RunPod workspace |
| Updates | Signed Stable/Nightly in-app updater on macOS | Internal TestFlight builds after eligible main CI |
See the Desktop App and iPhone App guides for complete workflows.
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,wan, andz-image. Wuerstchen and LTX Video are not wired for LoRA yet. - Wan adapters cover low-rank pairs and full-weight
.diff/.diff_bdeltas: on bf16 safetensors they merge as the weights are read, on GGUF they apply as a parallel branch at full precision. fp8-scaled Wan checkpoints refuse adapter stacks rather than re-round their weights. - 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. Wan checkpoints were tuned against a specific negative prompt, which mold applies automatically when a request leaves it unset;
/api/modelsadvertises it per model (default_negative_prompt), every surface prefills it, and clearing the field (or--no-negative) sends an explicit empty negative instead. 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, text-to-audio, image-to-video, audio-to-video, keyframe, retake, lip dub, public IC-LoRA, spatial upscale, and temporal upscale workflows.
- LTX-2 renders audio on its own with
--pipeline t2a(pipeline: "t2a"): no video, duration fromframes/fps, and a 16-bit PCM stereowavartifact that lands in the gallery with a rendered waveform tile. - LTX-2's multimodal guider exposes optional per-request overrides for STG scale/blocks, CFG-rescale, cross-modality scale, and the guidance skip stride on the CLI and in web, desktop, iPhone, and TUI Advanced video controls. They apply to the
two-stage,two-stage-hq,keyframe,a2-vid, andt2apipelines; unset fields keep each pipeline's own constants. The TUI uses bounded keyboard cycles for the numeric guidance values and validates comma-separated STG blocks before closing the editor; untouched values remain absent from the request. Its Video accordion also exposes the sharedenable_audiocontract as a checkpoint-aware default/on/off choice, family-gatedspatial_upscale/temporal_upscalenative modes, and the source-freeone-stage,two-stage,two-stage-hq, anddistilledrecipes while Auto leavespipelineabsent. Conditioning-file modes, the audio-onlyt2apipeline, and chain-job administration remain a separate tracked gap. - Completed LTX-2 videos report the runtime-resolved pipeline separately from the requested Auto/explicit choice. Server, CLI, and TUI saves preserve that response in gallery metadata, and web, desktop, iPhone, and TUI Library details show it when present; older and non-LTX prints simply omit the row.
- LTX-2 is performance-qualified on CUDA and Apple Metal (19B/22B distilled FP8 tiers, checkpoint-backed); CPU stays correctness-only.
- Library organization — titles, ♥ favorites, tags, collections, and a trash with per-host retention (
gallery.trash_retention_days) — is stored per host in that host'smold.dband merged across hosts by every client. The web Library exposes it as the Prints | Collections | Trash scope control, the filter-chip row, the print viewer's editable aside, and the selection bar's Add to collection / Tag / Favorite / Trash actions; Settings ▸ Library and Machines ▸ host edit retention. Hosts that do not advertisegallery.organize/gallery.trashshow none of it and keep permanent deletes. See Generating ▸ Browser UI. - Creation-time filing ("File under") lets a print arrive already organized:
GenerateRequestand the chain body carry additivetitle,tags, andcollection, seeded onto the gallery row once, as it is created. The CLI spells itmold run --title/--tag/--collection(with--no-auto-tagand thegenerate.auto_tag_titlepreference); web, desktop, and iPhone Create render a capability-gated File under group, and the TUI keeps it as the last Create ▸ Advanced section. A sequence files the stitched print only, batch and prepared siblings inherit their parent's filing, and a filing the host cannot apply is dropped and reported onx-mold-request-warningrather than failing the render. See Generating ▸ File under.
For model size and VRAM fit, see Models Overview. For usage examples, see Generating Images.