GLM-5.2 leads Artificial Analysis open-weights index at 51

Category: AI
Status: confirmed
Sources: Artificial Analysis, discussion
Summary: Artificial Analysis published an evaluation on 2026-06-17 placing Z.ai's GLM-5.2 at 51 on its Intelligence Index v4.1, the highest open-weights score, ahead of MiniMax-M3 and DeepSeek V4 Pro at 44. On the GDPval-AA v2 benchmark it reports GLM-5.2 at 1524 against GPT-5.5 at 1514. GLM-5.2 ships under the MIT license with a 1M-token context window, up from 200K on GLM-5.1, priced at 1.4 USD input, 0.26 USD cache-hit, and 4.4 USD output per 1M tokens. This is the independent benchmark and license confirmation following the model's 2026-06-13 announcement.
Why it matters: An MIT-licensed model topping the open-weights intelligence index while matching a frontier proprietary model on one benchmark raises migration pressure on paid coding and agent APIs.
Follow-up: Track open-weight checkpoint publication and independent coding-benchmark reproduction.