https://llmrequirements.com/news/2026-06-30-claude-sonnet-5-vs-glm-5-2 LLMRequirements.com en 2026-06-30T00:00:00.000Z Claude Sonnet 5 vs GLM 5.2: the closed benchmark king vs the open model you can actually run software, models, comparison, anthropic, open-weights