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Zenn (AI)Japan

Claude の Invalid signature in thinking block を直す ― 履歴は追記のみに

October 14

Claude Fable 5.1 に移行して、マルチターンのエージェントがこの 400 で止まった、という相談が増えています。2026 年 9 月に出た Opus 5.5 と Sonnet 5.5、10 月 7 日の Haiku 5.5 にも同じ仕組みが入ったので、今後はほとんどの最新モデルで当たります。

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