Boris Cherny
Every AI Founder Weekly story that cites Boris Cherny (@bcherny), newest first. 5 stories since September 2026.
On X: Claude @anthropicai
- Steinberger's test cleanup prompt names a 20% target
The instruction that did the work was a number, not a request to tidy up.
- Opus 5.5 built a 277k-gate computer in one 30-hour run
One prompt, no supervision, and a machine you can actually run in the browser.
- Opus 5.5 ported HAProxy to Rust in 9.5 hours, Anthropic says
Anthropic's own head to head has the new model finishing a real port faster and cheaper, which is exactly why it needs an outside run.
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- Anthropic merges Claude Cowork and chat into one Claude
Hand over a task, close the laptop, and Claude keeps going, with Docs, Slides and Design now inside every conversation.
- Shumer says one manager agent is enough, and his mom's closed $600
The founder says he runs hundreds of agents a day and still only needs one session that farms work out to the rest.
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