Zhipu 's GLM 5.2 artificial intelligence model landed last week with the kind of Silicon Valley buzz that followed DeepSeek 's launch last year. The Chinese AI startup 's new open source model has blown past every other open release and now sits within a percentage point of Anthropic 's Opus 4.8 on one closely watched agentic benchmark, at roughly a fifth of the cost. Developers are piling in, with OpenRouter token traffic climbing faster than it did after DeepSeek's V4 launch in April. And