modelbeast/BENCHMARKS.md

MODELBEAST Benchmarks (M3 Ultra, 256GB)

First measurements on this machine, recorded 2026-07-12. Fixtures are synthetic (Blender-rendered Suzanne), so quality numbers are not representative of real photography — these validate that the pipeline runs and how fast.

Scan track (fully validated, no gated weights)

Stage	Input	Settings	Result
colmap_poses	48 frames @ 800×600	sequential matcher, global (GLOMAP) mapper, OPENCV, CPU SIFT	48/48 images registered, 1479 points, 0.60px mean reprojection error; global mapper step ~1.0s; full job a few seconds
brush_train	above colmap_dataset	1500 steps, max_res 800, sh 2	~30–60s wall, 465KB splat.ply, renders in the in-app SplatViewer

A full-quality brush_train run is 30000 steps (the default) — expect minutes, and a much crisper splat than the 1500-step preview above.

Image generation — local FLUX lineup (M3 Ultra, mflux/MLX, 1024×1024, validated 2026-07-13)

All five installed and generating. Warm = weights cached (the real per-image cost):

Model	Steps	Warm gen	Peak MLX mem	Gated?	Best for
FLUX.2 Klein 4B	4	9.1s	18.0 GB	no (Apache)	volume / sprites — the default
FLUX.1 schnell-4bit	4	18.5s	19.1 GB	no (community quant)	fast draft, FLUX.1 look
FLUX.2 Klein 9B	4	18.7s	28.4 GB	yes	hero assets — best object accuracy of the whole lineup, cloud included
FLUX.1 schnell	4	20.4s	25.0 GB	yes	fast draft (Klein 9B beats it at same speed)
FLUX.1 dev	25	108.1s	25.1 GB	yes	cinematic mood / DoF when you can wait ~2 min

First-run downloads (one-time): schnell/dev ~31GB & ~16–19 min each, Klein 9B ~32GB, Klein 4B ~15GB. Believed among the first published M3 Ultra mflux FLUX.1/FLUX.2 numbers.

Sweet spot: Klein 9B. Same ~19s as schnell but far better object coherence → it dominates schnell. Klein 4B when speed matters (2× faster), dev only when you want the cinematic atmosphere. Note the hf_xet chunked downloader fails on these repos ("Unable to parse string as hex hash value") — the operator sets HF_HUB_DISABLE_XET=1 to force the reliable HTTP path.

First A/B (same prompt, 2026-07-12): FLUX.2 Klein 4B local (8s, $0) vs nano-banana via OpenRouter (google/gemini-2.5-flash-image, 7.7s, $0.0387 exact-billed). Klein: cleaner product-photo subject. nano-banana: richer scene dressing (books/inkwell/quill, dust motes) + finer engraving detail. Verdict: Klein is the volume workhorse; nano-banana wins on scene storytelling per prompt-adherence expectations (Elo 1154 vs ~1083).

Mesh-gen (local, validated 2026-07-13)

Operator	Config	Result
sf3d	image → GLB, MPS, tex 1024	~5s, ~9GB peak, 1.5MB GLB. Fast draft tier — good on solid objects, struggles on thin/open geometry. Needs OMP_NUM_THREADS=1+KMP_DUPLICATE_LIB_OK (segfaults otherwise).
trellis_mac	TRELLIS.2-4B, pipeline 1024, tex 2048, MPS	289s (~4.8 min) generation + 16s bake, 18.4MB GLB with PBR. SOTA-tier local quality — clean coherent geometry even on a thin-ringed astrolabe (dramatically better than SF3D). First run adds a one-time ~15GB download (~30 min); cached after. Needs HF_HUB_DISABLE_XET=1 + the OMP guards.
hunyuan3d_mlx	Hunyuan3D 2.1, native MLX (fp16), shape+PBR, tex 2048, remesh 40k	260s (~4.3 min) total (shape 149s + texture 112s), peak 20.2GB, 7.6MB GLB (40k faces, 2048² baseColor+MR PBR). Weights public — no HF login. Needs diffusers+fast_simplification in the venv. MLX-native → the one local 3D op that runs on M1 Ultra (trellis_mac's torch-MPS bf16 is unverified there).
bg_remove_local	RMBG-2.0, MPS, 1024	seconds; clean transparent cutout. Run before SF3D for a big geometry improvement. Note: keeps original RGB under alpha (upscale before cutout).

Head-to-head, same mermaid cutout (M3 Ultra, 2026-07-16)

	speed	GLB	faces	face/detail quality
trellis_mac	318s	23MB	175,842	sharper — defined eyes/nose/mouth, individually raised tail scales, vivid colors
hunyuan3d_mlx	260s	7.6MB	40,000	softer — melted face, smoothed scales, muted texture

Verdict: at defaults trellis_mac wins on quality (crisper face + geometry, richer color); hunyuan3d_mlx is faster, ~3× lighter, and the only local 3D op that runs on M1. sf3d stays the ~5s draft tier. All free/offline; fal cloud for on-demand SOTA without the local wait.

Video gen — mlx-video / Wan 2.1 on M3 Ultra (2026-07-17, first numbers)

Blaizzy/mlx-video (native MLX, MIT) at vendor/mlx-video. Wan2.1-T2V-1.3B, PyTorch weights → MLX via their converter (56s), raw .pth deleted after (MLX copy is what runs; 14GB).

run	config	time	note
T2V 3s	832×480, 49 frames, 50 steps, --tiling aggressive	809.6s (13.5 min)	T5 6.5s · denoise 780.7s (15.6s/step) · VAE decode 21.7s
smoke	832×480, 5 frames, 2 steps	11.8s	pipeline sanity

Quality: genuinely good — photoreal fox walking through snow, coherent across all 49 frames, correct gait, no flicker/melting. Output registered in the library (wan_first.mp4).

⚠️ THE GOTCHA — default --tiling auto gets Wan SIGKILLed past ~25 frames. Verified bisect (2 steps, 832×480): 13f (seq 6240) OK · 25f (seq 10920) OK · 33f (seq 14040) SIGKILL. It is not memory: it dies at 4GB RSS with 195GB free, and MLX reports max_buffer_length: 179GB / working set 239GB on this machine. The auto heuristic never enables temporal tiling, so the VAE decode explodes. Worse, it dies after denoising completes — with defaults you wait 14 min for the expensive part, then lose it at the decode with no error. Fix: --tiling aggressive (→ spatial=256px, temporal=32f) — 33f then saves fine. --tiling temporal does not help.

Other mlx-video packaging bugs found (all upstream-PR-worthy): (1) torch is required to read the .pth T5/VAE but is undeclared — conversion dies halfway, leaving a plausible-looking broken model dir; (2) librosa is a hard dep though only LTX-2's audio VAE uses it — drags in ancient numba and breaks install on modern Python (should be an optional [audio] extra); (3) README documents python -m mlx_video.wan2.convert — that module doesn't exist (it's mlx_video.models.wan_2.convert).

Wan2.2-TI2V-5B (23GB MLX, text+image→video): 704², 49 frames, 40 steps = 337s (5.6 min) — faster than the 1.3B at 832×480 (fewer steps + better-conditioned I2V). Note Wan2.2-I2V-A14B is 126GB (~250GB with conversion) — not attempted.

❌ NEGATIVE RESULT: I2V-synthesized orbits do NOT reconstruct in 3D (2026-07-17)

Tested the appealing shortcut — single image → I2V "camera orbit" → frames → colmap_poses → brush_train — i.e. synthesize the turntable instead of filming it. Prompted TI2V-5B explicitly for camera orbit around a static subject (parallax being what COLMAP needs), fed the RMBG mermaid cutout on white.

source	registered images	3D points triangulated
real iPad room video	34	1006 ✅
synthesized I2V orbit	26	0 ❌

Zero triangulated points. COLMAP matched features and guessed poses but could not place a single consistent point in space (hence Failed to fix Gauge … insufficient number of fixed points: 0, and a "reconstruction" in 2.4s vs ~60s for real footage). Brush still emitted a 190MB .ply — trained faithfully on geometry-free input, i.e. garbage. Bigger splat ≠ better.

Why: the video visibly rotates (back of the head by frame 47) but the subject is not rigid — the tail dissolves, an orb materialises, the figure morphs into a different object. Video models optimise temporal plausibility, not multi-view consistency; 3D needs the latter. Each frame is individually gorgeous and mutually incompatible.

Conclusion: you cannot synthesize your way out of capture. For video→3D, film the real turntable (→ bg_remove_local/CorridorKey → colmap → brush/hunyuan3d_mlx). Use I2V for motion/B-roll, not as a multi-view source. Don't re-run this experiment — it's a property of the objective, not a tuning problem. (A purpose-built multi-view/NVS model — e.g. TRELLIS-class or a camera-controlled LoRA — is the thing that could work; a general I2V model can't.)

CorridorKey (neural green-screen keyer, MLX) — Ultra tuning (2026-07-16)

Corridor Digital's keyer (vendor/corridorkey, 14.4k★) with the native MLX backend (corridorkey-mlx, resolved from git — not on PyPI). Benchmarked on a synthetic 12-frame 2048² green-screen set with exact ground-truth alpha (RMBG mermaid cutout + soft-alpha stripes/disk over chroma green); hint = 8× downscaled truth. Scores = alpha MAE / soft-IoU vs truth, steady-state after 2-frame warmup.

config	M3 s/f	M1 s/f	MAE ↓	IoU ↑	peak GB
full 2048 (stock default)	3.81	4.97	0.0091	0.925	28.2
full 1024	0.61	0.75	0.0111	0.908	3.7
full 512	0.25	0.31	0.0139	0.885	2.6
tiled 512 (stock: compile forced off)	3.64	4.65	0.0082	0.932	2.5
tiled 512 + our compile patch	2.48	4.19	0.0082	0.932	2.3

Findings: (1) compile gains nothing full-frame at 2048 on Ultras (within noise) — the documented "1.5–2×" is a small-res/laptop figure. (2) Tiled-512 is the QUALITY winner, not just the memory fallback — best alpha accuracy, model at native tile scale over full-res input. (3) Upstream hard-codes compile=False in tiled mode; tiles are fixed-shape so compilation applies — our 1-line patch (vendor/corridorkey-mlx, branch modelbeast, editable-installed into the app venv on M3+M1) makes tiled 1.47× faster on M3 (3.64→2.48 s/f), 1.11× on M1, output bit-identical. (4) tile 1024 tested worse (quality + speed) — 512 is the sweet spot. (5) full-frame 2048 peaks 28 GB → 32GB Macs (M1 Max) should run tiled (2.3 GB) — which is also the best-quality config anyway.

Fleet verdict: best-quality config = tile_size=512, overlap=64 + our patch: M3 ~0.40 fps, M1 ~0.24 fps at 2048², IoU 0.932, 2.3 GB — runs on every node including the M4 24GB. Throughput mode: full-1024 (1.65/1.34 fps, IoU 0.908). MLX gaps: blue-screen checkpoint + despill/despeckle not yet on MLX (torch backend covers those). License: CC BY-NC-SA (non-commercial).

Fleet ablation follow-up (2026-07-16, full report in the fork: monster/corridorkey-mrp-mlx → docs/2026-07-16-m-series-fleet-ablation-results.md): ran upstream's own 6-toggle benchmark matrix on M3+M1+M4. New best config on BOTH Ultras = tiled 768/64 + compile (M3 1949ms, M1 3275ms per 2048² raster — vs 2788/5373 full-frame) at 2.4GB. Big discovery: sdpa is a 4.5× regression on M1-class GPUs at 2048 (18.6s vs 4.1s) and free on M3; bf16 is neutral on both — gate sdpa by GPU generation, the "M1 bf16 danger" assumption is wrong for this workload. stage_gc harmful on Ultras (0.53–0.66×). M4 24GB swaps at full-frame 2048 (~20–24s all configs) → tiled mandatory there; healthy ≤1024.

Phase D — hunyuan Studio tuning (2026-07-16, M3 Ultra) → new operator defaults

Raised the config from the laptop-tuned defaults to octree_resolution 384 + remesh_faces 120000 + texture_size 4096. 4096² bake works on the Studio GPU — no Metal command-buffer watchdog (the existing extract_textiles tiling handles it; uv_feature_map never needed patching). Result: 380s (shape 160 + tex 221), peak 20.2GB, 21.5MB GLB, 78k verts / 120k faces, 4096² baseColor+MR. Quality jump is real — the melted face gains defined eyes + structure, tail geometry sharpens, textures crisper; closes most of the gap to trellis (trellis still edges the face). Cost: ~46% slower + ~3× file size vs the 40k/2048 default. These are now the hunyuan3d_mlx operator defaults (all still param-overridable; drop to remesh_faces 40000/texture_size 2048 for fast drafts). 4096 confirmed watchdog-free on the M1 Ultra too (751s total — M1 runs it at ~2× M3 time, so speed-critical jobs prefer M3, which is first in the pool). Defaults are fleet-safe on both Ultras.

Mesh-gen — earlier install notes (superseded by the table above)

Operator	Install	Runtime status
sf3d	venv + Metal texture_baker/uv_unwrapper kernels compiled OK; torch 2.13 MPS available	Runs end-to-end; weights gated — stabilityai/stable-fast-3d returns GatedRepoError until the owner accepts the license + sets an HF token. Then expect seconds-to-a-minute on MPS.
trellis_mac	setup.sh built .venv (py3.11) + mtl* Metal kernels; torch 2.13 MPS available	Runs end-to-end; weights gated — needs HF access to facebook/dinov3-vitl16-pretrain-lvd1689m + briaai/RMBG-2.0. Expect ~3–5 min/gen once authed (M4 Pro reference; M3 Ultra should match or beat).
fal_* (trellis / trellis2 / hunyuan3d / rodin)	none (API)	Gated on FAL_KEY. Verified param surfaces; ~1s–1min server-side per fal docs.

To unblock the gated local operators

1. Accept the model licenses on HuggingFace (one-time, usually instant):
   • https://huggingface.co/stabilityai/stable-fast-3d
   • https://huggingface.co/facebook/dinov3-vitl16-pretrain-lvd1689m
   • https://huggingface.co/briaai/RMBG-2.0
2. Either huggingface-cli login on the machine, or paste an HF token into Settings → "HuggingFace token" (injected as HF_TOKEN for the operators).

Method

Timings are wall-clock from the job runner (started_at→finished_at), single job at a time (gpu lane = 1). Re-run tests/smoke.sh for the framework regression suite (12 checks, ~30s).