What is Hy4 preview?
Hy4 preview is a Other model: Tencent Hunyuan's 28 Aug 2026 open-weight preview: 770B total / 49B active MoE, context over 1M tokens. API list $0.834 / $2.501 per 1M tokens; cache hits $0.042. Not yet on the 1 Sep AA API snapshot.
What is Hy4 preview for?
Open-weight Hunyuan preview for coding, office, and research agents. Prefer the Tencent launch note over unsourced leaderboard screenshots; AA rows will land when the snapshot lists the model.
How large is the Hy4 preview context window?
Hy4 preview publishes a 1M token context window.