https://51allai.com/posts/2026/08/workbuddy-hy4-preview-global/ 51AllAI zh-cn 2026-08-30T05:52:23+00:00 WorkBuddy 国际版接入 Hy4 preview，770B 开源模型限免两周 https://51allai.com/posts/2026/08/tencent-hy4-preview/ 51AllAI zh-cn 2026-08-28T11:54:41+00:00 腾讯开源 Hy4 preview：770B 总参数、1M 上下文，API 输入价 6 元/百万 Token