Anthropic Fixes Claude Code After Quality Slump, Denies Deliberate Nerf

TL;DR Summary
Anthropic says Claude Code's drop in performance was caused by three product tweaks—not an intentional nerf—and, after a post-mortem, fixed the issues (default thinking level, a cache bug, and a verbose system prompt); the company expanded testing, improved reviews, and reset subscriber usage limits as of April 20.
- Anthropic says Claude Code did get worse — but shoots down speculation it 'nerfed' the model Business Insider
- An update on recent Claude Code quality reports Anthropic
- Anthropic’s Claude Is Pumping Out Vulnerable Code, Cyber Experts Warn Forbes
- Claude Opus 4.7 has turned into an overzealous query cop, devs complain theregister.com
- Mystery solved: Anthropic reveals changes to Claude's harnesses and operating instructions likely caused degradation VentureBeat
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