Users Claim Opus 5.5 Was Nerfed, Researchers Blame Honeymoon Effect

Users flooded timelines claiming Opus 5.5 was nerfed, citing dumber and more verbose behavior. Researchers countered that this happens after every new model release and is simply hedonic adaptation, not an actual downgrade.

2026-09-25 ~ 2026-09-26 · 2 related posts

• Users claim Opus 5.5 was nerfed; dev counters it's just hedonic adaptation — daniel_mac8 · 2026-09-25
• 'Opus 5.5 got nerfed' complaints are just the usual model honeymoon phase, says researcher — Yuchenj_UW · 2026-09-26