ltx-2.5-mlx / dev /q4 /split_model.json
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{
"format": "split",
"model_version": "2.5.0",
"variant": "dev",
"tier": "q4",
"quantized": true,
"quantization_bits": 4,
"quantization_group_size": 64,
"components": [
"transformer",
"text_encoder",
"connector",
"vae_decoder",
"vae_encoder",
"diffusion_vae_encoder",
"vae_diffusion_decoder",
"audio_vae",
"vocoder",
"spatial_upsampler",
"temporal_upsampler",
"duration_head"
],
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"dense_reason": "below-quality-bar",
"dense_reason_detail": "quantizing this component at this tier's width is structurally fine and measurably too lossy to ship: sc-18775: over the 49 hidden states the LTX-2.5 feature extractor concatenates, q4 lands at worst cos 0.889414 / rel L2 0.53488 against bf16 (bar: cos > 0.97, rel L2 < 0.30); q8 lands at 0.999086 / 0.04320 and passes"
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"dense_reason": "no-mlx-port",
"dense_reason_detail": "this crate has no MLX port that can run these weights yet (sc-18777); quantizing them would ship weights no test can exercise"
}
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}