Grok4との出会い：AI知能の未来

Grok4は、エロン・マスクが率いるxAIが開発した次世代AI言語モデルです。日常会話から企業アプリケーションまで対応する多機能「スイスアーミーナイフ」として設計され、高度な推論能力、リアルタイムデータアクセス、テキスト・視覚・コード生成のマルチモーダルサポートを特徴とします。

Grok4は2025年7月4日以降にリリース予定です。一部のAPIエンドポイントは既に利用可能で、段階的展開戦略を示しています。このモデルは、当初予定されていたGrok 3.5をスキップし、Grok 3からの大幅アップグレードを表します。

Grok4はChatGPT、Claude、Geminiなどの主要AIシステムと直接競合します。数学推論（AIME 2025: 52点 vs GPT-4oの48点）、科学知識（GPQA: 75点）、コーディングタスク（LCB: 57点）で優れています。主な優位点は、リアルタイムデータアクセス、130Kトークンコンテキストウィンドウ、専門的企業知識です。

Key features include: Advanced reasoning based on first-principles physics, 130,000 token context window, DeepSearch for real-time internet and X platform data, specialized Grok4 Code for programming tasks, Think Mode for step-by-step reasoning, and upcoming multi-modal support for vision and image generation.

Grok4 Code is a specialized model designed as a "coding companion" for advanced IDE integration and built-in file editors. It can answer code-related questions, integrate directly into code editors through Cursor, and features a VSCode-like interface within the Grok web platform for seamless development workflows.

Think Mode allows users to track Grok4's step-by-step reasoning process, making its logic transparent and verifiable. Big Brain Mode is designed for complex problem-solving tasks requiring extended reasoning capabilities. Both features enhance the model's ability to handle sophisticated analytical tasks.

はい、Grok 4は現在、サブスクリプション不要で全ユーザーに限定時間の無料アクセスを提供しています。0 xAIは全員にGrok 4をアンロックしましたが、非購読者は1日5リクエストに制限されています。プラットフォームには自動モード（複雑なプロンプトを自動的にGrok 4に送信）とエキスパートモード（手動でモデルを有効化）が含まれています。この戦略的転換は、ユーザーベースの拡大とエンゲージメントデータの収集を目的としています。

Grok 4はすでに限定時間の無料アクセスの提供を開始しています。0 xAIの公式確認によると、Grok 4は現在、サブスクリプション要件なしで全ユーザーにアンロックされています。xAIはこれを「限定時間」オファーと説明していますが、具体的な終了日は発表されていません。この無料戦略は、iOS・Androidアプリで現在無料提供されているGrok Imagine（AI画像・動画ジェネレーター）の発表と同期しています。

価格階層には以下が含まれます：無料アクセス（1日の使用制限あり）、高度なGrok機能を含むX Premium+（月額40ドルまたは年額月当たり32.92ドル）、純粋なAI機能のためのSuperGrokサブスクリプション（月額30ドルまたは年額300ドル）、カスタム価格のエンタープライズAPI。APIは標準ティアでリクエスト当たり約0.03ドルです。

Grok4 will be accessible through xAI's API, integrated platforms including X (formerly Twitter), mobile devices (iOS, Android), and web (grok.com). It will also integrate with Tesla vehicles and potentially with brain-computer interfaces and Optimus robots in the future.

X Premium+ includes full X features plus advanced Grok capabilities and early access to new features. SuperGrok is "pure Grok" designed specifically for AI work, offering more features, roles, workspaces, higher image generation limits, priority access, and advanced AI tools without X platform integration.

Grok4 features a 130,000 token context window (up from Grok 3's 32,000), advanced reasoning based on first-principles physics, real-time data processing through DeepSearch, and is trained on xAI's Colossus supercomputer with 100,000+ GPUs. It supports JSON communication, chat completion, and image understanding.

Grok4 is built on xAI's Colossus supercomputer, constructed in less than nine months using over 100,000 hours of NVIDIA GPU processing time. The facility houses 200,000 GPUs, with plans to expand to 1 million GPUs, requiring massive procurement from NVIDIA and AMD.

Initially, Grok4 supports text modality with plans to quickly introduce comprehensive vision and image generation capabilities. It will be xAI's first model to integrate flagship language, vision, and coding capabilities into a unified API, supporting multiple languages and technical domains.

Yes, Grok4 excels in enterprise use cases including data extraction, coding, and text summarization. It has deep expertise in finance, medical, legal, and scientific domains. The grok-4-prod-mimic model is specifically designed for enterprise applications with professional-grade API and custom integrations.

Grok4 API includes REST API with JSON communication, chat completion, image understanding models, authentication via bearer tokens, and customizable parameters like temperature, max tokens, top_p, frequency penalty, and presence penalty. Enterprise customers get custom pricing and high-throughput access.

Yes, Grok4 Code is designed for advanced IDE integration and works seamlessly with Cursor. It features built-in file editors and can be embedded directly into development environments. The model supports various programming languages and can assist with code review, debugging, and optimization.

xAI has developed a comprehensive risk management framework including malicious use prevention, safeguard measures like refusal training and "circuit breakers," input/output filtering for harmful content, and regular adversarial testing. The system includes customizable safety modes including NSFW and child-safe modes.

xAI's privacy policy states they don't collect personal information for marketing purposes or share it with third parties for marketing. However, due to the model's technical complexity, they cannot guarantee factual accuracy of outputs or correct factually incorrect personal information.

Grok4's mission to "rewrite the entire human knowledge base" raises concerns about potential bias and factual manipulation. Critics worry about the model potentially distorting public perception and blurring lines between factual reporting and personal bias. xAI is committed to transparency and third-party auditing to address these concerns.