Early Opus 5 access suggests the model is fast, but too eager at high reasoning
alliekmiller · x · 2026-07-25
Early access to Opus 5 suggests the model is extremely fast, but also unusually eager.
The poster says they often default to high reasoning effort on complex tasks, but had to lower this model to medium because the model’s default behavior felt too aggressive. The takeaway: reasoning level can materially change results.
Related event: Claude Opus 5 Early Tests: Better Efficiency but Overly Proactive(29 posts)→
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