Simon Willison's Weblog simonwillison.net

Highlights from my appearance on the Data Renegades podcast with CL Kao and Dori Wilson

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Google Antigravity Exfiltrates Data

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Constant-time support lands in LLVM: Protecting cryptographic code at the compiler level

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llm-anthropic 0.23

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LLM SVG Generation Benchmark

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Quoting Claude Opus 4.5 system prompt

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Claude Opus 4.5, and why evaluating new LLMs is increasingly difficult

simonwillison.net·22w·Hacker News, Hacker News

sqlite-utils 3.39

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sqlite-utils 4.0a1 has several (minor) backwards incompatible changes

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"Good engineering management" is a fad

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Agent design is still hard

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Olmo 3 is a fully open LLM

simonwillison.net·23w·Hacker News

We should all be using dependency cooldowns

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Nano Banana Pro aka gemini-3-pro-image-preview is the best available image generation model

simonwillison.net·23w·Hacker News, Hacker News

Quoting Nicholas Carlini

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Building more with GPT-5.1-Codex-Max

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How I automate my Substack newsletter with content from my blog

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Quoting Matthew Prince

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llm-gemini 0.27

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MacWhisper has Automatic Speaker Recognition now

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