Wan 2.1 T2V 1.3B (wan family)
Parameters: 1.3 B (active:  B)
Mixture-of-experts: no
Release: 2025-02
Modality: video
Model license: Apache-2.0 (commercial use: yes)
Architecture: dit (backbone 1.3 B)
Backbone size (GB by quant):
fp16: 2.84
q8: 1.54
q4: 0.98
Additional components: name: umT5-XXL text encoder
fp16_gb: 11.4
fp8_gb: 6.74
q4_gb: 3.66
offloaded: yes
VAE size: 0.51 GB
Default output: 832×480 (480p), 81 frames (~5 s)
Recommended setup: gb: 6
quant: Q4 GGUF
Memory without offload: 20 GB; offload floor: 5 GB
Device classes: mac, nvidia, amd
Tools: ComfyUI, Diffusers
Notes: The accessible Wan tier (1.3B DiT). Backbone bf16 is 2.84GB; the umT5-XXL encoder (11.4GB) is offloaded to CPU via --t5_cpu, so the native bf16 GPU peak is ~8.2GB (Wan-AI's own figure) and GGUF Q4 + T5 on CPU drops it to ~5-6GB. Generates 832x480, 81 frames (~5s) at 16fps. Apache-2.0, commercial OK. Anchor is the GGUF Q4 community path (synthesis). Sources: Wan-AI card, samuelchristlie GGUF, city96 umT5 GGUF, Wan2.1 repo.