Sam Witteveen · 2026-06-17 · notable
Sam Witteveen: GLM 5.2 — the top new open-weights model
Sam Witteveen walks through Z.ai's GLM 5.2, the new top open-weights model on the Artificial Analysis Intelligence Index. Witteveen covers the MIT license, 1M-token context, coding benchmarks, and how GLM 5.2 stacks against closed frontier models.
Sam Witteveen's hands-on review of Z.ai's GLM 5.2, the new leading open-weights model on the Artificial Analysis Intelligence Index.
What is it?
Sam Witteveen is a long-standing AI YouTuber and developer who reviews new open-weights models. In this video Sam Witteveen walks through GLM 5.2, Z.ai's MIT-licensed flagship that just topped the Artificial Analysis open-weights leaderboard with a 1M-token context window.
How does it work?
Sam Witteveen runs through GLM 5.2's positioning on the Artificial Analysis Intelligence Index, the MIT licensing terms, the 1M-token context, and the GLM Coding Plan that ships GLM 5.2 first. The video compares benchmark numbers against closed frontier models and shows the API pattern for calling GLM 5.2 through z.ai and DeepInfra-style providers.
Why does it matter?
GLM 5.2 is the first open-weights release to take the AA leaderboard from closed labs in several months, so a creator walkthrough helps practitioners decide whether to self-host GLM 5.2 or stick with Claude / GPT for coding work. Witteveen's runs make the practical tradeoffs concrete.
Who is it for?
AI engineers evaluating open-weights coding models