Z.ai drops GLM-5.2: a 744B open-weight model that beats Claude Opus 4.8 on frontend coding benchmarks

[AINews] GLM-5.2: the top Frontend Coding model in the world, IndexShare for Speculative Decoding

Z.ai released GLM-5.2 over the weekend under an MIT license. The 744B MoE model targets coding and long-horizon agent tasks. Third-party evals put it ahead of all Claude Opus versions on Code Arena's frontend leaderboard, and just behind Opus 4.8 overall. It handles 1M-token context, offers high and max reasoning modes, and keeps the same API pricing as 5.1 at $1.4/$4.4 per million input/output tokens. Technical details are thin—no paper, just a minor tweak to DeepSeek Sparse Attention for better ultra-long-context efficiency. Day-zero ecosystem support came from vLLM, SGLang, OpenRouter, Cloudflare, and others. Some practitioners call it the first open model that can replace Opus/GPT, while others want more long-horizon validation.

Why it matters: GLM-5.2 beats all Claude Opus versions on Code Arena's frontend leaderboard and trails Opus 4.8 only slightly overall. 744B MoE with MIT license makes it a real new option for frontend and agent builders. Not 85+ yet because we only have third-party evals and official claims —...