Opus 5 Performance Drop Sparks Diminishing Returns Debate

Users report that Opus 5 shows degraded instruction following and increased errors compared to version 4.8, sparking a broader discussion on whether frontier AI models are hitting a phase of diminishing marginal returns.

2026-07-28 ~ 2026-07-28 · 2 related posts

• Opus 5 reportedly makes more mistakes than 4.8, raising doubts about frontier gains — springrod · 2026-07-28
• Users say Opus 5 is missing instructions more often than 4.8 — springrod · 2026-07-28