Wan2.1 Review — Alibaba's Apache 2.0 Open-Source Video Model That Beat Sora on VBench

Wan2.1 is Alibaba's fully open-source (Apache 2.0) video generation model that scored #1 on VBench at launch in February 2025, outperforming Sora, HunyuanVideo, and Runway Gen-3. The 14B model runs on an RTX 4090 with offloading; the 1.3B variant needs only 8GB VRAM. Now on Wan2.7 with 4K image output and one-pass audio-video sync. 10.9 million Replicate runs. No official MCP server. Rating 4/5.