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    <loc>https://mikawa-ai.jp/resources/articles/claude-sonnet-5-5-what-changed</loc>
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      <news:publication>
        <news:name>MIKAWA AI PICKS</news:name>
        <news:language>ja</news:language>
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      <news:publication_date>2026-09-29</news:publication_date>
      <news:title>Claude Sonnet 5.5とは｜同じ値段で速く安くなった新モデルの変更点と切り替え方</news:title>
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