The Ledger
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Cherny: Anthropic Can No Longer Demonstrate Prompt Injection on Opus 5
“So essentially, if you combine a well-aligned model, so this is, like, essentially three years of research into alignment, With a prompt injection classifier, which we run for all traffic, and what this is doing is it's based on Chrysola's mechanistic interpre…”
Cherny: Bun codebase was rewritten to Rust in 11 days using Claude
“And he had the model rewrite it from Zig to Rust. It was one prompt. It was a dynamic workflow, and a dynamic workflows are a feature in quad code that essentially let you orchestrate, you know, dozens, 100,000 of agents to do work productively. And it ran for…”
Anthropic Deleted 80% of Claude Code System Prompt for Opus 5
“So yeah, we deleted 80% of the system prompt.”
Cherny: Claude Code runs in production on Bun's AI-rewritten Rust codebase
“This is in production now. This is what quad code uses now when you're running it.”
Mercury data shows 70 percent of startups choose Claude
“There was some stuff from Mercury that like, 70% of startups are, you know, choosing quad as their model of choice.”
SemiAnalysis reports Claude Code generates four percent of all public commits
“There were some other stuff from like semi-analysis that four percent of all public commits are made by quad code.”