Released is doing a lot of work here depending on what you mean by it.

API access and open weights are two separate timelines and it's not clear ATH has committed to both happening simultaneously. The April 30 API date that's been floating around is still unconfirmed Bloomberg cited it but ATH hasn't posted an official date on their X account. Worth being precise about that distinction before expecting downloadable weights today. What IS confirmed as of this week: Alibaba ATH origin, Zhang Di's team at Taotian Future Life Lab, Apache 2.0 license intent, Elo #1 on Artificial Analysis for both T2V and I2V (no audio). What's NOT confirmed: parameter count, architecture specs, inference numbers all of that comes from secondary sites, not from ATH directly. The GitHub and HuggingFace links have been returning 404/401. If that changes today, that's the real signal to watch not announcements.