Sam Witteveen · 2026-07-07 · notable
Sam Witteveen: 'Hy3 from Tencent - The NEW GLM Competitor'
Sam Witteveen walks through Tencent's Hunyuan Hy3, a 295B / 21B-active open-source MoE with a 256K context, and lines it up against Z.ai's GLM 5.2 for open-weight coding work.
A hands-on video look at Tencent's freshly open-sourced Hunyuan Hy3, positioned against GLM 5.2.
What is it?
Sam Witteveen's July 7 video 'Hy3 from Tencent - The NEW GLM Competitor' is a walkthrough of Tencent's Hunyuan Hy3, the 295B-parameter MoE with 21B active parameters and a 256K context window that Tencent open-sourced this week.
How does it work?
The video puts Hy3 side-by-side with Z.ai's GLM 5.2, the current open-weight leader, and runs the kind of coding and reasoning prompts Sam usually uses to compare open models on his channel.
Why does it matter?
Sam Witteveen's channel is a common first-look source for AI engineers evaluating new open-weight models. The video slots in alongside the Tencent Hy3 release entry in the feed and gives builders a practical sense of where Hy3 lands versus GLM 5.2.
Who is it for?
Engineers weighing Hy3 as an open-weight alternative to GLM 5.2 or closed frontier models.
Try it
Watch on YouTube: https://www.youtube.com/watch?v=IjjrfnuwhCg