LongCat AudioDiT 3.5B — BF16 Weight Only Quantized (ComfyUI) BF16 quantized version of meituan longcat/LongCat AudioDiT 3.5B. Original Model Paper GitHub (Original) ComfyUI Node What is this? This is a BF16 conversion of LongCat AudioDiT 3.5B — a state of the art diffusion based zero shot TTS model by Meituan that operates directly in the waveform latent space. Converting from FP32 to BF16 halves the on disk size and VRAM usage with negligible quality loss, making it the recommended variant for most users. Original (3.5B FP32) This (3.5B BF16) Weight dtype float32 bfloat16 Activation dtype float32 bfloat16 File size ~14 GB ~7 GB VRAM (inference) ~20 GB ~12 GB Quality Reference Virtually identical Extra dependencies none none Conversion Details All model weights — DiT transformer backbone, Wav VAE, and text encoder — are converted from float32 to bfloat16. BF16 preserves the same dynamic range as FP32 (8 exponent bits) while halving memory usage, making it the lossless practical choice for inference on modern GPUs. No post training quantization, calibration data, or scale factors are required. The model is a direct dtype cast and is fully compatible with the original audiodit infere…
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