Claude
Anthropic's conversational AI model family used for coding and other tasks. Every AI Coding Weekly story on Claude, newest first. 14 stories since September 2026.
- Boris Cherny says there is no secret to prompting
Talk to Claude like a coworker, say what you want, how much effort to spend, and how it should check its own work.
- Theo ships tsc-rs, a Rust TypeScript compiler he never read
Five months of agent work, two token bills that differ by a factor of twenty, and zero lines of human review.
- Theo flips, says preferring OpenAI models for code barely adds up
Two months of vibe ratings, and the one that moved most was not capability.
- Theo. Opus 5.5 takes half of all T3 Code prompts
The first model in Theo's coding product to cross a 50% share of traffic, by his own account.
- Zechner flips to Sol the same day Theo says it ran in circles
Two engineers who actually ran the models landed on opposite verdicts in the same week.
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- Theo says a $200 Claude sub bought $9,000 of Opus usage
His own accounting of his own accounts, not a number from Anthropic.
- Theo says Opus 5.5 threw out Astra's Rust port, not fixed it
The 10 hour result stands, but the mechanism behind it was a from-scratch rewrite in a new crate.
- Opus 5.5 beat Fable 5.1 on HAProxy port time and cost
Two models did the same C to Rust port, and the gap showed up in hours and dollars rather than pass rates.
- Theo does the math on Opus 5.5 usage limits
Half of a Claude Code subscription was off limits to Fable, and Opus 5.5 on high costs over 2x less.
- DHH had Opus 5.5 rewrite a Rust screensaver in assembler
The Omarchy ttfx engine went from Rust to hand level SIMD in a single translation, and got faster while he slept.
- Opus 5.5 keeps editing files with bash, Armin Ronacher says
Two engineers agree on the behavior and disagree on whether to push back against it.
- Boris Cherny had two models port HAProxy from C to Rust
Both models passed nearly all of HAProxy's tests, but one got there faster and cheaper.
- Kenton Varda says testers mistook Opus 5.5 for a new Fable
A reviewer who says he still reads the code rates Opus 5.5 close to Fable on style, and keeps GPT models for bug hunting.
- dax moves part of his team off Astra after spend doubles
One team's cost numbers, a few bad impressions and a paused top tier all landed in the same week.
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