Users Complain Claude IQ Drop, Anthropic Scrambles to Recover
annetgriffin · x · 2026-08-19
Multiple users recently reported severe degradation in Claude model performance, specifically noting Fable 5 is "borderline unusable." This follows three major bugs in Claude Code during Aug/Sept 2025 that caused user churn. While issues were fixed before the 2025 holidays, sparking a new wave of building, Anthropic faces intense competition. They must now figure out how to retain model strengths while fixing issues driving users away, relying partly on earlier enterprise deals as a buffer.
Related event: Claude Opus 5 Tops Benchmarks but Triggers User Exodus(10 posts)→
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