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xAIがリリースした「Grok 4.3」

11/5/2026

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2026年5月にイーロン・マスク氏率いるxAIがリリースした最新の大規模言語モデルGrok 4.3は、性能では競合のGPT-5.5やClaude 4.7に一歩譲るものの、圧倒的なコストパフォーマンスと実用性を重視した戦略を採っていて、100万トークンというコンテキストウィンドウや、法務・財務分野での高い専門性、さらに音声クローンやCarPlay対応といった多角的な新機能を備えている点が特徴です。
Grok 4.3について、生成AIに深掘りさせました。なお、生成AIによる調査・分析結果は、公開された情報からだけの分析であり、必ずしも実情を示したものではないこと、誤った情報も含まれていることについてはご留意されたうえで、ご参照ください。
  
【ゆっくり解説】Grok 4.3がついに登場!価格40%カット、音声クローン2分、車対応までGrokが本気出した1週間!
https://www.youtube.com/watch?v=gCSICqdcOTI
 
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xAI Releases “Grok 4.3”
In May 2026, xAI, led by Elon Musk, released its latest large language model, Grok 4.3. While its raw performance appears to trail leading competitors such as OpenAI’s GPT-5.5 and Anthropic’s Claude 4.7 by a small margin, Grok 4.3 adopts a strategy focused on overwhelming cost-performance efficiency and practical usability. Its notable features include a massive 1-million-token context window, strong specialization in legal and financial domains, and a wide range of new capabilities such as voice cloning and support for CarPlay integration.
I asked generative AI to conduct an in-depth analysis of Grok 4.3. Please note that the research and analysis generated by AI are based solely on publicly available information and may not necessarily reflect the actual situation. The results may also contain inaccuracies, so please keep this in mind when reviewing the analysis.
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