Simon Willison
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Latest publications
Simon Willison's sqlite-utils 4.0 adds database schema migrations
Developer Simon Willison released sqlite-utils 4.0—a CLI tool and Python library for SQLite—with schema migration support.
OpenAI released flagship model GPT-5.6 in three versions — Luna, Terra and Sol
OpenAI released GPT-5.6 in three versions — Luna, Terra and Sol — and claimed that the senior model outperformed Claude Fable 5 by 13.1 points on the agent tasks test.
ChatGPT Work and Codex: OpenAI tries to explain where conversations are stored
OpenAI released a product guide for ChatGPT Work and Codex, trying to explain the difference between cloud and desktop conversations — but the explanation turned out confusing.
Simon Willison used GPT-5.5 to create a web component for embedding GitHub code
Developer Simon Willison demonstrated an experimental github-code web component that embeds code snippets directly from GitHub pages — the code was written by the GPT-5.5 model.
Simon Willison Releases llm 0.31.1 with Tool Call Bug Fix
Developer of the open-source llm CLI tool Simon Willison released version 0.31.1, fixing a bug in tool calls with empty arguments.
Tencent Open-Sourced LLM Hy3 with 295 Billion Parameters
Tencent released LLM Hy3 under Apache 2.0 license — a model with 295 billion parameters (21 billion active) with 256K context, competing with much larger open models.
Meta Launches Muse Spark 1.1 with Public API and Tool Calling Improvements
Meta introduced Muse Spark 1.1 — the first version of its AI model to receive public API access with enhanced agent capabilities and automation features.
OpenAI Introduced GPT-Live — Updated Voice ChatGPT with GPT-5.5 Support
OpenAI launched GPT-Live — an updated voice mode for ChatGPT that can delegate complex tasks to GPT-5.5.