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Apr 8, 2026

Z.AI Releases GLM-5.1 Open-Source Model Capable of 8-Hour Autonomous Execution

Chinese AI company Z.AI unveiled GLM-5.1, a 754B parameter open-source agentic model that achieves state-of-the-art performance on SWE-Bench Pro and can run autonomously for up to 8 hours on long-horizon engineering tasks.

Apr 8, 2026·2 sources
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Top claims

  • ▪GLM-5.1 is available through Z.ai's developer platforms with model weights published for local deployment.
  • ▪Terminal-Bench 2.0 evaluates real-world terminal-based problem solving.
  • ▪Companies can adapt GLM-5.1 to their own codebases and internal tools without restrictions.

Topics

Open model benchmarks & leaderboardsChina AI regulationsAI agentsSoftware engineering benchmark (SWE-bench)Open-source AIOpen model families
Large language models (LLMs)

Related entities

GPT-5.4Gemini 3.1 ProChinaGoogle

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