HeyGen ports Avatar IV model to Google Cloud TPUs
HeyGen has ported its 18B+ parameter Avatar IV video generation model to Google Cloud's Trillium (v6e) TPUs. Using torchax and XLA with FSDP and Ulysses sequence parallelism, the team achieved a 1.86x speedup for real-time streaming. The optimizations were deployed only after a two-tier quality gate confirmed pixel outputs stayed identical.
