GLM 5.2 Boosts Context Window to 1M Tokens, API Costs Soar

Z.ai dropped GLM 5.2 on June 13, 2026, and the benchmarks are hard to ignore. It's a 744B-parameter Mixture-of-Experts model with roughly 40B active parameters per token, a 1M-token context window, and MIT-licensed weights. It currently ranks #4 out of 124 models on BenchLM's provisional leaderboard