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Gemini 3 Pro:スペック・料金・主要機能を徹底解説

Gemini 3 Proの推論能力・パフォーマンスベンチマーク・料金・アクセス方法を詳しく解説し、GPT-5およびClaude Sonnet 5との比較も掲載。
Gemini 3 Pro:スペック・料金・主要機能を徹底解説
E
Editorial Team
Jul 21, 2026 ・ 1 mins read

[@portabletext/react] Unknown block type "span", specify a component for it in the `components.types` prop

Gemini 3 Proとは?

[@portabletext/react] Unknown block type "span", specify a component for it in the `components.types` prop

[@portabletext/react] Unknown block type "span", specify a component for it in the `components.types` prop

[@portabletext/react] Unknown block type "span", specify a component for it in the `components.types` prop

Gemini 3 Proの主要機能

深層推論と多段階プランニング

[@portabletext/react] Unknown block type "span", specify a component for it in the `components.types` prop

200万トークンコンテキストウィンドウ

[@portabletext/react] Unknown block type "span", specify a component for it in the `components.types` prop

ネイティブマルチモーダルの入出力

[@portabletext/react] Unknown block type "span", specify a component for it in the `components.types` propNano Banana Pro[@portabletext/react] Unknown block type "span", specify a component for it in the `components.types` prop

Web検索によるリアルタイムグラウンディング

[@portabletext/react] Unknown block type "span", specify a component for it in the `components.types` prop

コード生成と実行

[@portabletext/react] Unknown block type "span", specify a component for it in the `components.types` prop

エージェント機能とツール使用

[@portabletext/react] Unknown block type "span", specify a component for it in the `components.types` prop

Gemini 3 Proのパフォーマンスベンチマーク

[@portabletext/react] Unknown block type "span", specify a component for it in the `components.types` prop

ベンチマークGemini 3 ProGPT-5Claude Sonnet 5
MMLU(知識)~92%~91%~90%
GPQA Diamond(科学)~72%~70%~68%
HumanEval(コーディング)~90%~92%~88%
MATH(数学的推論)~88%~87%~85%
コンテキストウィンドウ200万トークン128Kトークン200Kトークン

[@portabletext/react] Unknown block type "span", specify a component for it in the `components.types` prop

Gemini 3 Proの料金

[@portabletext/react] Unknown block type "span", specify a component for it in the `components.types` prop

アクセス方法料金
Geminiアプリ(無料枠)制限あり、レート制限付き
Google AI Pro約$19.99/月
Google AI Ultra$99.99/月〜
API — 入力(≤200K)$3.50/100万トークン
API — 入力(>200K)$7.00/100万トークン
API — 出力トークン$10.50/100万トークン

[@portabletext/react] Unknown block type "span", specify a component for it in the `components.types` prop

Gemini 3 Proへのアクセス方法

[@portabletext/react] Unknown block type "span", specify a component for it in the `components.types` prop

[@portabletext/react] Unknown block type "span", specify a component for it in the `components.types` propChat Smith[@portabletext/react] Unknown block type "span", specify a component for it in the `components.types` prop

Gemini 3 Pro vs GPT-5 vs Claude Sonnet 5

[@portabletext/react] Unknown block type "span", specify a component for it in the `components.types` propGPT-5[@portabletext/react] Unknown block type "span", specify a component for it in the `components.types` propClaude Sonnet 5[@portabletext/react] Unknown block type "span", specify a component for it in the `components.types` prop

  • [@portabletext/react] Unknown block type "span", specify a component for it in the `components.types` prop
  • [@portabletext/react] Unknown block type "span", specify a component for it in the `components.types` prop
  • [@portabletext/react] Unknown block type "span", specify a component for it in the `components.types` prop

強みと制限

強み

  • [@portabletext/react] Unknown block type "span", specify a component for it in the `components.types` prop
  • [@portabletext/react] Unknown block type "span", specify a component for it in the `components.types` prop
  • [@portabletext/react] Unknown block type "span", specify a component for it in the `components.types` prop
  • [@portabletext/react] Unknown block type "span", specify a component for it in the `components.types` prop
  • [@portabletext/react] Unknown block type "span", specify a component for it in the `components.types` prop

制限

  • [@portabletext/react] Unknown block type "span", specify a component for it in the `components.types` prop
  • [@portabletext/react] Unknown block type "span", specify a component for it in the `components.types` prop
  • [@portabletext/react] Unknown block type "span", specify a component for it in the `components.types` prop
  • [@portabletext/react] Unknown block type "span", specify a component for it in the `components.types` prop

Chat SmithでGemini 3 Proを使う方法

[@portabletext/react] Unknown block type "span", specify a component for it in the `components.types` prop

[@portabletext/react] Unknown block type "span", specify a component for it in the `components.types` propGemini 3 Flash[@portabletext/react] Unknown block type "span", specify a component for it in the `components.types` propGemini 3.5 Flash[@portabletext/react] Unknown block type "span", specify a component for it in the `components.types` prop

[@portabletext/react] Unknown block type "span", specify a component for it in the `components.types` propGemini 3.1 Flash Lite[@portabletext/react] Unknown block type "span", specify a component for it in the `components.types` prop

まとめ

[@portabletext/react] Unknown block type "span", specify a component for it in the `components.types` prop

[@portabletext/react] Unknown block type "span", specify a component for it in the `components.types` propChat Smith[@portabletext/react] Unknown block type "span", specify a component for it in the `components.types` prop

よくある質問

1. Gemini 3 Proは無料で使えますか?

[@portabletext/react] Unknown block type "span", specify a component for it in the `components.types` prop

2. Gemini 2.5 ProとGemini 3 Proの違いは何ですか?

[@portabletext/react] Unknown block type "span", specify a component for it in the `components.types` prop

3. Gemini 3 ProはGPT-5より優れていますか?

[@portabletext/react] Unknown block type "span", specify a component for it in the `components.types` prop

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Editorial Team

Chat Smith 編集チームは、AI をより身近で実用的なものにすることを目指す AI 愛好家、研究者、コンテンツクリエイターで構成されています。Chat Smith ブログでは、最新の AI トレンド、ツールレビュー、業界インサイト、実践的なガイドを共有し、個人や企業が AI をより効果的に活用できるよう支援しています。私たちの使命はシンプルです。急速に進化する AI の世界で、読者が常に最新情報を把握し、生産性を高め、一歩先を行けるよう、分かりやすく信頼できるコンテンツを提供することです。

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