What Is Claude (Anthropic)? Features, Pricing, and How to Get Started with a Safety-First AI

AI-powered article summarypowered by Claude

Many people have heard the names "Claude" and "Anthropic" but aren't sure how they differ from ChatGPT. Anthropic is a relatively young AI company founded in 2021, yet it has established a global presence in the field of AI safety research. Its product, Claude, is used in a wide range of settings — from work and study to coding.

結論powered by Claude
"Claude" is an AI assistant developed by Anthropic, and its defining characteristic is that it is "a product born from safety research." Anthropic is an AI safety research company founded in 2021, and the findings from that research are directly reflected in the Claude product.

The fundamental difference from ChatGPT and Gemini lies in design philosophy. Through Constitutional AI, Claude is given explicit values and behavioral guidelines, and is designed to read context and make appropriate judgments on its own — a clear distinction from models that simply restrict outputs through rules.

This article covers everything a first-time user needs to know: the background of Anthropic as a company, how Claude differs from ChatGPT and Gemini, how to choose between the Free/Pro/Max plans, and how to actually get started.

目次 (8)

What Kind of Company Is Anthropic?

Anthropic is an AI safety research company co-founded in 2021 by siblings Dario Amodei and Daniela Amodei. According to the company's official website (anthropic.com/company), its mission is "the responsible development and maintenance of advanced AI for the long-term benefit of humanity," and it simultaneously pursues both the commercial development of technology and safety research.

Worth noting is the company's organizational structure: it operates as a Public Benefit Corporation. Rather than maximizing profit, its legal mission centers on delivering long-term benefits to humanity as a whole. This structure allows Anthropic to accept external investment while maintaining priority allocation of funds toward AI safety research.

Anthropic pursues multiple approaches to AI safety in parallel, including interpretability research (enabling humans to understand what AI is "thinking"), learning from human feedback (RLHF), and policy analysis. What sets it apart from other AI companies is that these research outputs feed directly into the Claude product.

Why Claude Prioritizes Safety Above All Else

What fundamentally differentiates Claude from ChatGPT and Gemini is the design philosophy: "safety research results become the product directly." One of Anthropic's key methods is Constitutional AI, an approach that gives the AI explicit values and behavioral guidelines and trains it to learn safety autonomously based on those principles.

Whereas most large language models are designed to "restrict harmful outputs through rules," Claude aims to "understand why a given output is problematic and make its own judgment accordingly." As a result, even in ambiguous situations not fully covered by explicit rules, Claude is more likely to read context and behave appropriately.

This commitment to safety can sometimes feel limiting. Claude may decline requests that raise ethical concerns. However, that very consistency is why it earns high marks for trustworthiness when enterprises evaluate AI for integration into business systems.

What You Can Do with Claude — Key Features

On Anthropic's product overview page (claude.com/product/overview), Claude is positioned as "AI for problem solvers." Here are its main capabilities.

Text Generation, Summarization, and Translation Claude handles a wide range of text-centric tasks including writing, summarization, translation, and research. Its ability to ingest lengthy documents and extract key points in one pass is highly regarded in the industry. It supports file uploads, allowing direct analysis of PDFs and various document types.

Coding Assistance (Claude Code) A feature dedicated to code generation, debugging, and refactoring. It can be operated directly from the terminal and supports file operations and Git integration. Simply issuing natural-language instructions is enough to make code changes, dramatically improving development efficiency.

Integration with Local Files (Claude Cowork) A feature that connects Claude to files on your own PC and cloud apps, embedding it into your actual working environment. Rather than functioning as a standalone chat AI, it works as an assistant woven into everyday workflows.

Real-Time Web Search Claude can search the web in real time and answer questions based on the latest information. The ability to access information from this very moment — rather than relying solely on past training data — is particularly powerful for research and investigative tasks.

Voice Mode In addition to text input, Claude supports voice-based interaction. This makes it easy to use naturally on the go or when your hands are occupied.

Multi-Platform Support Available via web browser, Mac/Windows desktop apps, and iOS/Android apps. Chrome extensions, Slack integration, and Microsoft 365 connectivity are also provided, making it easy to add Claude on top of your existing toolset.

How Claude Differs from ChatGPT and Gemini

Compared to ChatGPT (by OpenAI) and Gemini (by Google) — the other major AI chat products — Claude has the following distinguishing characteristics.

Long-Document Processing Claude is known for its large context window (the amount of information it can process at once), making it particularly good at handling lengthy papers, books, or entire large codebases in a single pass. It excels at tasks that require cross-referencing multiple documents.

Precise Adherence to Instructions When given complex conditions or multi-step instructions, Claude is frequently praised for following them with high fidelity. This is one of the reasons it is favored by professional users as "an AI that actually does what you tell it to."

Consistent Safety Judgment Thanks to Constitutional AI training, the threshold at which Claude declines ethically problematic requests is relatively consistent. This consistency often works in its favor when enterprises conduct trustworthiness assessments before deploying AI in internal systems.

Independence of Its Developer While OpenAI is deeply integrated with Microsoft and Google's Gemini is tightly woven into Google's own services, Anthropic maintains its position as an independent AI safety research company. Organizations that prefer not to depend on a single large tech giant are increasingly choosing Claude for this reason.

Claude's Model Lineup

Claude currently spans several model tiers, each balancing capability and speed differently.

Model Tier Characteristics Primary Use Cases
Opus Highest accuracy, largest scale Complex reasoning, long-document analysis, advanced coding
Sonnet Balanced Wide range of tasks from everyday work to specialized projects
Haiku Lightweight, fast Simple Q&A, cost-sensitive application integration

On the Pro plan and above, you can freely switch between multiple models, allowing you to choose the optimal model for each task. A common approach is to use Opus for heavy analysis, Sonnet for everyday work, and Haiku for high-volume application processing.

How to Choose the Right Pricing Plan

Claude's pricing spans five tiers, from individual users to large enterprises (claude.com/pricing).

Free ($0/month) An entry-level plan to try the basic chat features at no cost. Ideal if you want to experience what Claude is like or if you use it infrequently.

Pro ($17–$20/month) $17/month on an annual plan, or $20/month on a monthly basis. Usage limits are significantly higher than Free, and Claude Code and Claude Cowork are included. Also comes with access to multiple models and Microsoft 365 integration. This is the baseline plan for individuals who want to use Claude seriously.

Max ($100+/month) A heavy-user plan offering 5× or 20× the usage of Pro, depending on the tier you choose. Suited to professionals who routinely handle large volumes of work and developers who use Claude Code extensively for extended periods.

Team ($20–$125/seat/month) A plan designed for organizational use. Adds single sign-on (SSO), centralized billing management, enterprise search, and organization-wide skill deployment. Pricing differs between standard and premium seats.

Enterprise Designed for large enterprises, with full support for compliance-heavy industries through features such as SCIM, audit logs, HIPAA compliance, and custom data retention management. Claude Security is also included.

For individuals, the standard path is to try Free first and then upgrade to Pro based on how frequently you use it.

4 Steps to Get Started with Claude

  1. Go to claude.ai and create a free account using your Google account, Apple account, or email address.
  2. Start by trying the basic features on the Free plan. Once the chat interface opens, you can ask questions directly in your language — no special configuration needed.
  3. When your usage increases and you start hitting the usage limit, consider upgrading to the Pro plan, starting from $17/month.
  4. If you need coding support or integration with local files, consider adding Claude Code or the desktop app.

Claude natively supports a wide range of languages, so you can use it naturally without needing to translate into English. The UI is fully localized, making the barrier to entry low for anyone trying AI chat for the first time.

The Road Ahead for Anthropic

Anthropic continues to actively pursue AI safety research while simultaneously expanding its product line. Recently, it announced a suite of products called "Claude Security" aimed at the security sector, signaling a direction that positions AI as something that "provides safety" rather than something that "poses danger."

While Claude is recognized as a leading AI chat product alongside ChatGPT and Gemini, Anthropic's fundamental purpose is "to solve the research challenges of AI safety and build AI that is beneficial to humanity over the long term." The fact that the outcomes of that research are delivered directly as a product gives Claude a context that sets it apart from other AI services.

Understanding Anthropic as a company and Claude as a product before you begin using it opens up possibilities that go far beyond a simple "chat AI."

参考になったら ♡
Clauder Navi 編集部
@clauder_navi

Anthropic の Claude / Claude Code を中心に、日本のエンジニア向けに最新動向と実務 を毎日発信。 運営方針 は メディアについて をご覧ください。