Z.AI has released its GLM 5.1 model, an open-source option designed for long-horizon agentic tasks capable of running autonomously for up to 8 hours. This model reportedly outperforms GPT-5.4, Claude Opus 4.6, and Gemini 3.1 Pro on the SWE-Bench Pro benchmark. The company also offers GLM 4.5 Air for faster, lower-cost daily use and GLM 5 Turbo for mid-tier agentic execution, all accessible through MCP Agent Studio without requiring API keys or coding. AI
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IMPACT New open-source model claims SOTA on SWE-Bench Pro, potentially impacting agent development and tool-calling capabilities.
RANK_REASON Z.AI (formerly Zhipu AI) released GLM 5.1, an open-source model with specific benchmark performance claims against competitors. [lever_c_demoted from frontier_release: ic=1 ai=1.0]