Simon Willison summarizes six months of large language model developments from November 2025 to April 2026, highlighting an inflection point where coding agents became production-ready and open-weight models dramatically improved. Key developments include multiple model leadership changes among Claude, GPT, and Gemini, the emergence of personal AI assistants called "Claws," and significant open-weight releases from Chinese labs including GLM-5.1 and Qwen.
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Simon Willison summarizes six months of large language model developments from November 2025 to April 2026, highlighting an inflection point where coding agents became production-ready and open-weight models dramatically improved. Key developments include multiple model leadership changes among Claude, GPT, and Gemini, the emergence of personal AI assistants called "Claws," and significant open-weight releases from Chinese labs including GLM-5.1 and Qwen.