Claude Opus 4.8 Launches: 69.2% Agentic Coding Score, Dynamic Workflows Spin Up 1,000 Parallel Subagents — 1,639 Points on HN

Anthropic / Hacker News·high signal

Anthropic shipped Claude Opus 4.8 on May 28, 2026, with agentic coding scores jumping from 64.3% to 69.2% and knowledge work from 1753 to 1890. The flagship feature is Dynamic Workflows — Claude writes JavaScript orchestration scripts on the fly, spinning up to 1,000 parallel subagents with adversarial verification loops. Jarred Sumner used it to port Bun from Zig to Rust: 750K lines in 11 days, 99.8% test suite green. HN response is massive: 1,639 points, 1,269 comments.