Originally published on AI Tech Connect.
What builders need to know Open weights took the lead. Released on 13 June 2026, GLM-5.2 from Z.ai is now the top open-weight model on the Artificial Analysis Intelligence Index (v4.1), scoring 51 — clear of DeepSeek V4 Pro at 44 and Kimi K2.6 at 43. It is a sparse giant. 744B total parameters but only around 40B active per token, thanks to a Mixture-of-Experts design, with a 1M-token context window. The licence is the headline. The weights ship under the permissive MIT licence — self-hostable, fine-tunable and commercially usable, with no per-token API bill attached. Coding at a fraction of the cost. Z.ai reports GLM-5.2 beating GPT-5.5 on several coding benchmarks at roughly one-sixth of the cost — a vendor claim worth validating, but a striking one. Long context got cheaper to serve. A…
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