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Tools2026-08-21 · source-backed
Bun.WebView drives either macOS WebKit or a local Chromium over CDP. Willison's prototype exposes /javascript, /screenshot (PNG, JPEG, WebP) and /healthz, opening one tab per request for concurrency, and he measured that complex pages need a 192MB to 256MB container, tested with cgroups. Simon Willison The release itself buried the Zig-to-Rust rewrite behind 1,517 new Node test-suite additions, 2,900+ bug fixes, 5x lower idle CPU, up to 35% less memory, and 50% faster Linux startup. Vercel added 1.4 to Functions the same day, opt-in via bunVersion because of breaking changes (Vercel).
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Satya Nadella said companies routing everything through a single proprietary lab may not survive. His argument: you hand that lab your most sensitive business context, and the lab can turn it against you as a competitor. His prescription is an orchestration layer — keep the ha...
On July 16 there was a wave of backlash calling the Bun Zig→Rust rewrite unreviewed AI slop. On July 19, Simon Willison went and checked. (Simon Willison) Jarred Sumner claimed Claude Code v2.1.181 and later ship the Rust port. Willison verified it independently rather than ta...
Simon Willison highlighted Sophie Alpert's short internal policy on AI-assisted writing, whose load-bearing rule is accountability: "You must stand behind every idea and every sentence in your docs," because you can't excuse a bad passage by blaming the LLM, and doing so waste...
Simon Willison surfaced Jarred Sumner's writeup of rewriting Bun's core from Zig to Rust this week, and the numbers stopped me cold. PR #30412, merged May 14, added roughly 1 million lines across 2,188 files, reached 99.8% test compatibility on Linux x64, and shrank the binary...
GPT-5.6 Luna went to $0.20 input / $1.20 output per million tokens on July 30. That's an 80% cut. Terra dropped 20%. Luna's input now undercuts Gemini 3.1 Flash-Lite ($0.25/$1.50) and sits at one-fifth of Claude Haiku 4.5's $1 input. Simon Willison covered the announcement and...
Thibault Sottiaux at OpenAI published an investigation into "a handful of reports where GPT-5.6 unexpectedly deleted files," finding it happens most commonly when full access mode is enabled in Codex. Simon Willison relayed it. A frontier lab publishing a first-party post-mort...
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