Simon Willison 1/1/2026

2025: The year in LLMs

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This article is a year-in-review analysis of the LLM landscape in 2025. It details major trends such as the rise of 'reasoning' models (RLVR), the proliferation of AI agents, coding assistants, the competitive shift among major labs, and the evolution of both local and cloud models. It provides a technical overview of the year's most significant advancements and industry changes.

2025: The year in LLMs

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