MiniMax H3 FL2VA Pruned — importance-guided mixed-IQ1 QF2 GGUF
Experimental mixed-precision GGUF quantizations of the approximately 20B-parameter pruned MiniMax H3 FL2VA diffusion denoiser. This is not the complete H3 system; its Qwen3-VL text encoder and video/audio VAEs are separate.
The repository owner confirms separate written MiniMax authorization covering this publication. That authorization is not sublicensed here; downstream users remain responsible for the official license and location-specific authorization.
Artifact and quality status
The original uniform IQ1_S and IQ1_M files are deprecated: perceptual FAIL. They load and produce valid A/V containers, but a controlled 22-frame test produced no recognizable fox or snow.
QF2 is the final importance-guided mixed-precision policy. Earlier QF1 working files are superseded internal evidence, not final artifacts.
| File | Bytes | SHA-256 | Validated scope |
|---|
minimax_h3_fl2va_pruned-UD-IQ1_M-QF.gguf | 10,985,133,600 | c7993a8a0eb202f63f30cb410817fc0a504f3c844ea4e8dbb38599d29b0d4bdc | Four-step website PASS, including motorcycle holdout; eight-step visual PASS/audio FAIL |
minimax_h3_fl2va_pruned-UD-IQ1_S-QF.gguf | 10,876,753,440 | b12244f203e257f10c9cec56b8062aa65d627d9250c433ef633a244d610b292c | Four-step website PASS, including motorcycle holdout; eight-step visual PASS/audio FAIL |
minimax_h3_fl2va_pruned-IQ1_S.gguf | 4,062,866,976 | 76f1d0bcc9052978489814004b0aaefd1a60fc8b7b8223029749085915b2946f | DEPRECATED — perceptual FAIL |
minimax_h3_fl2va_pruned-IQ1_M.gguf | 4,532,514,336 | b356d321476e7ceaf7848d0d0db7f7a82403f212313f0b7e69d1cd26c6799746 | DEPRECATED — perceptual FAIL |
The website four-step profile and eight-step full profile have separate verdicts. Do not describe either QF2 file as having passed full eight-step audiovisual generation.
What QF2 means
The refreshed activation importance matrix showed a steep rise through later fc1 blocks. QF2 therefore uses:
- BF16:
condition_proj.weight and protected one-dimensional norm/gain tensors
- Q8_0: both token-refiner blocks and every eligible matrix in main blocks 46–49
- Q4_K:
mlp.fc1 in blocks 30–45, plus attention qkv_proj/out_proj and mlp.fc2 in all non-Q8 main blocks
- IQ1_S or IQ1_M: only
mlp.fc1 in blocks 0–29
- inherited Q8_0: audio/video patch-projection weights whose shapes cannot be converted to IQ1/Q4_K
- source precision: biases, final/output layers, and other shapes excluded by converter safeguards
These are mixed-precision derivatives. IQ1 is the lowest precision and covers 4,624,220,160 parameters; the files are not uniform one-bit models.
Controlled quick audit
Same fox prompt, seed 11, CPU RNG, 320x192, 22 frames, 24 FPS, 4 steps, CFG 1.0:
| Denoiser | PSNR vs Q8 | SSIM vs Q8 | Luma SD | Laplacian | Phase-grid 16 | Adjacent MAD | Audio clipped | Human gate |
|---|
| Q8_0 control | reference | reference | 41.371961 | 4.104783 | 0.0180393 | 3.101225 | 0.00% | PASS |
| Original IQ1_S | 11.680717 dB | 0.502004 | 25.35 | 26.55 | 0.180 | not recorded | 4.50% | FAIL: no fox or snow |
| Original IQ1_M | 15.176109 dB | 0.448978 | 20.56 | 54.10 | 0.403 | not recorded | 3.60% | FAIL: no fox or snow |
| QF2 IQ1_M | 24.800133 dB | 0.876201 | 45.441886 | 3.198496 | 0.01557654 | 2.260789 | 0.00841864% | PASS: coherent fox, no grid |
| QF2 IQ1_S | 27.801705 dB | 0.895095 | 44.8127344 | 3.1386273 | 0.0148840364 | 1.78388595 | 0.00336746% | Low-resolution shape smeared, but no grid |
PSNR and SSIM compare decoded frames against Q8 at identical settings. LPIPS was not collected and is not claimed.
Website and holdout evidence
- QF2 IQ1_M fox, 640x384/39 frames/4 steps: clear fox; audio RMS -15.6642 dBFS; clipped fraction 0; MP4 SHA-256
e42ee46827018f86e86b67238e1806a6e9d20500a90e5e03710d3cee4fa02253.
- QF2 IQ1_S fox, same website profile: clear walking fox; MAD 4.089718; audio RMS -16.70895 dBFS; clipped fraction 0; MP4 SHA-256
23214d5008dc58edc036d0f89b9e4a1b442be5d4265e2218d03c4416095db24a.
- QF2 IQ1_M motorcycle holdout, seed 123: human PASS; PSNR 22.117554 dB; SSIM 0.885048; MP4 SHA-256
0b28a8c0a19ef8090fdc580a2c0f672ed1a341128ab0d2957f56b104a680c099.
- QF2 IQ1_M motorcycle audio versus Q8: RMS -4.226/-4.380 dBFS, clipped 2.853%/2.530%, spectral correlation 0.8285/0.8136. Clipping occurs in the Q8 baseline too and is disclosed, not treated as clipping-free output.
- QF2 IQ1_S motorcycle holdout, seed 123: human PASS with a stable red motorcycle and rider on a coastal road at sunset; PSNR 21.096775 dB; SSIM 0.862191; MP4 SHA-256
93ddcf76e9d98c78b0a51dd059a43d6bc478f451f06176ef8cda00a5a0a144f2.
- QF2 IQ1_S motorcycle audio versus Q8: RMS -4.43595/-4.37951 dBFS; clipped 2.0843%/2.5304%; spectral correlation 0.84383/0.83414; time correlation 0.6931/0.7082. The prompt is loud and clipped in the Q8 baseline too; QF2 IQ1_S does not add excess clipping in this test.
Review samples
Independent Q8 holdout control:
MP4 ·
contact sheet.
Eight-step limitation
Both QF2 variants produce excellent articulated walking-fox video at 640x384/39 frames/8 steps, but both fail the full-profile audio comparison:
- IQ1_M: audio RMS -70.98 dBFS versus Q8 -50.40 dBFS; motion MAD 6.809 versus Q8 5.984.
- IQ1_S: audio RMS -73.11065 dBFS versus Q8 -50.4007 dBFS; motion MAD 6.23523; PSNR 16.112583 dB; SSIM 0.754325; MP4 SHA-256
b8bc469b9b2f521a844b431afa750dcb5a89b9e7b88bf59123adabb0fda606af.
The deployed four-step website profile passes; eight-step audio does not.
Tensor inventory
Both actual QF2 files contain 532 tensors and 20,111,438,744 parameters. Their inventories are identical except for the IQ1 subtype.
| Type | Tensors | Parameters |
|---|
| BF16 | 212 | 28,113,664 |
| F16 | 102 | 43,642,368 |
| F32 | 8 | 707,224 |
| Q8_0 | 26 | 2,312,798,208 |
| Q4_K | 154 | 13,101,957,120 |
| IQ1_S or IQ1_M | 30 | 4,624,220,160 |
The Q8_0 count includes audio/video patch weights inherited from the Q8 conversion input. The BF16 count includes explicit condition_proj.weight plus the one-dimensional tensors protected by the patched converter.
Required companion files
qwen3vl_32b_minimax_h3-Q2_K_M.gguf from unsloth/MiniMax-H3-GGUFminimax_h3_video_vae_fp16.safetensors and minimax_h3_audio_vae_fp32.safetensors from Comfy-Org/MiniMax-H3
Run the validated website profile
1sd-cli --mode vid_gen \
2 --diffusion-model minimax_h3_fl2va_pruned-UD-IQ1_M-QF.gguf \
3 --llm qwen3vl_32b_minimax_h3-Q2_K_M.gguf \
4 --vae minimax_h3_video_vae_fp16.safetensors \
5 --audio-vae minimax_h3_audio_vae_fp32.safetensors \
6 --prompt "a red fox trotting through falling snow, cinematic" \
7 --width 640 --height 384 --video-frames 39 --steps 4 \
8 --cfg-scale 1.0 --backend te=cpu --diffusion-fa \
9 --output out.webm
--mode vid_gen, --cfg-scale 1.0, and --backend te=cpu are required for this H3 setup. Add --offload-to-cpu when needed for GPU memory.
Provenance
- base model:
MiniMaxAI/MiniMax-H3 revision 6818f6c32d12b210915e44ad56a4228c2608f160
- pruned FL2VA lineage:
Comfy-Org/MiniMax-H3 revision 014cd40f7e177756c6b2473c0d93b1c89a790dd2
- QF2 conversion input:
unsloth/MiniMax-H3-GGUF Q8_0 revision 9ee8213df85a2fcec53dec8c651a0fb1e821674a
- converter/runtime:
unslothai/stable-diffusion.cpp revision 13b9d92b5e9a1563536c9c980e700470f9ab6702
- calibration matrix: 18,693,323 bytes; SHA-256
6ce80c23f85d50cc170b1bfafa681811e5ef26590757f1c31540485b502c67a2
Read LICENSE, NOTICE, and QUALITY_REPORT.md before use. These are unofficial Model Derivatives, not official MiniMax or Comfy-Org products, and neither organization endorses them.
