Opus 5

part of Opus

6 statements across 1 episodes · 5 bullish · 0 bearish · 2 people on the record · first statement Jul 27, 2026 by Boris Cherny · across every show →

Everything said about Opus 5, oldest first

Jul 27, 2026 positive
Insight
Cherny: Claude Code Users Should Delete CLAUDE.md Scaffolding Every Six Months
“Every six months, delete your Cloud MD. Delete your skills. Delete your hooks. See what the model does, and it might surprise you. And actually for Opus Five, this is something we really do recommend, is just try deleting all of these things, because the model…”
Boris Cherny Jul 27, 2026 ▶ 6:56 Boris Cherny: We Cut 80% of Claude Code’s Prompt · Y Combinator
Jul 27, 2026 neutral
Assertion Not checkable as stated
Cherny: Claude still struggles with systems code, distributed systems, and UI verification
“So coding is solved for the kind of coding that I do. It's not solved for everyone. You know, there's still code bases that are like super deep systems code bases where quad still struggles. There's distributed systems where quad still struggles. There's reall…”
Boris Cherny Jul 27, 2026 ▶ 30:40 Boris Cherny: We Cut 80% of Claude Code’s Prompt · Y Combinator
Jul 27, 2026 positive
Assertion Supported
Anthropic Deleted 80% of Claude Code System Prompt for Opus 5
“So yeah, we deleted 80% of the system prompt.”
Boris Cherny Jul 27, 2026 ▶ 4:30 Boris Cherny: We Cut 80% of Claude Code’s Prompt · Y Combinator
Jul 27, 2026 positive
Assertion Contradicted
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…”
Boris Cherny Jul 27, 2026 ▶ 2:46 Boris Cherny: We Cut 80% of Claude Code’s Prompt · Y Combinator
Jul 27, 2026 positive
Assertion Supported
Hu: Anthropic Opus 5 achieved 30% on ARC-AGI
“You guys got, took Arc AGI three to 30%, which is incredible.”
Diana Hu Jul 27, 2026 ▶ 0:33 Boris Cherny: We Cut 80% of Claude Code’s Prompt · Y Combinator
Jul 27, 2026 bullish
Assertion Open · timeframe Jul 2027
Cherny: Claude Opus 5 Can Run Autonomously for Months Without Scaffolding
“For five, one example of something it does that I think no other model has done is it runs for a very long period of time. And especially when you combine Opus Five with auto mode, it's just like incredible. Like it can go for days, weeks, months at a time. It…”
Boris Cherny Jul 27, 2026 ▶ 1:25 Boris Cherny: We Cut 80% of Claude Code’s Prompt · Y Combinator
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