Simon Willison 2/11/2026

GLM-5: From Vibe Coding to Agentic Engineering

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The article discusses the release of GLM-5, a new 754B parameter, 1.51TB open-source AI model from Z.ai, comparing its scale to previous versions. It highlights the emerging term 'Agentic Engineering' as a descriptor for professional software engineering with LLMs, citing mentions by figures like Andrej Karpathy. The author includes a practical test, generating an SVG image via the model, and notes its mixed results.

GLM-5: From Vibe Coding to Agentic Engineering

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