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Gemini 4 Argon costs half of Claude Opus 5.5 per token. On my 20-run production monorepo bench it passed every test in 16 runs and never broke a passing test, the best result of any model so far. It also wrote 2.8x the output tokens and cost more than Opus. On December 1 the price doubles. On vision tasks it came last.
Read more →Boris Cherny, who built Claude Code, says engineering, product, design and data science are melting into one role, and what's left is five archetypes: Prototyper, Builder, Sweeper, Grower, Maintainer. I read the list and realised I'm all five, because building solo with agents leaves no one to hand a phase to. The framework is thirty years old. What's new is that it just became the primary axis instead of the secondary one.
Read more →Benchmarks say turn effort up. On real work, it went the other way. I ran Claude Opus 5.5, Claude Sonnet 5.5 and GPT-6 Sol at low, medium, high, xhigh and max effort on six real changes from a production monorepo: 300 runs. Opus peaked at medium, the Claude Code default, and reproduced it exactly on a second day. Above medium it started breaking tests. More effort never made any model more careful.
Read more →Boris Cherny shared his workflow for the tool he built. The setup is surprisingly vanilla. The philosophy is worth studying.
Read more →Two weeks ago I wrote that the future of AI is CI. Then I built the factory: a live control room over 30 services, built in under ten days. Deploys show up as beads on an oscilloscope trace, an agent writes the risk brief, a second agent tries to tear it down, and I can ask Claude what is in prod from my terminal.
Read more →Opus 5 writes 510 words where Opus 4.5 wrote 158, with 2.3 times the em dashes and twice the 'load-bearing'. Arena measured it, Hacker News named it, Reddit downgraded over it. Anthropic's answer arrived in Fable 5.1's prompting docs: a paragraph defining 'mannered prose', with the model's own tics as the examples, for you to paste into your prompt. The vendor wrote the style guide against its own model, and shipped it as your job.
Read more →Claude Code can now watch your PRs in the cloud, fix CI failures, and address reviewer comments while you're away. It's the logical next step after auto mode - and it raises the same trust questions, harder.
Read more →AI coding tools create a legal paradox: the code you ship likely can't be copyrighted, but it might infringe someone else's. All the liability, none of the protection.
Read more →The official Claude Code plugin that lets agents work autonomously for hours. When to use it, when not to, and the philosophy behind letting AI fail repeatedly until it succeeds.
Read more →Real footgun stories and the deterministic hooks that would've prevented them. From $30k API key leaks to nuked home directories.
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