Opus 5.5は性能が低下したのか？11月3日に思考パターンが変化
Is Opus 5.5 nerfed? Thinking patterns changed on November 3 (twitter.com)
要約
あるユーザーは、大規模言語モデル「Opus 5.5」の性能が11月3日頃に低下したのではないかと疑問を呈しています。Gemini 4 Argonを用いて1,400件のClaude Codeセッションを分析した結果、モデル名は変わっていないものの、推論のやり方に顕著な変化が見られたとのことです。この投稿は、AIモデルの挙動変化に関する議論を呼んでいます。
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Shane Melaugh on X: "is Opus 5.5 nerfed? I just had Gemini 4 Argon analyze 1,400 Claude Code sessions and it found that on November 3, something definitely happened. the model name didn't change, but the way it does reasoning took a sharp turn."
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[Shane Melaugh](https://x.com/shanemelaugh)
is Opus 5.5 nerfed? I just had Gemini 4 Argon analyze 1,400 Claude Code sessions and it found that on November 3, something definitely happened. the model name didn't change, but the way it does reasoning took a sharp turn.
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[10:15 PM · Nov 7, 2026](https://x.com/shanemelaugh/status/2119192075505893695)
[436.9K](https://x.com/shanemelaugh/status/2119192075505893695)
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