AI Assistant Free Plan Pro $20/mo

Claude AI

Anthropic's AI assistant built for safety and intelligence

Claude is a frontier AI assistant by Anthropic with a 200K-token context window, agentic coding capabilities via Claude Code, and constitutional AI safety. It handles everything from long-document analysis to autonomous software engineering.

Visit Claude

2023

Launched

AI Assistant

What is Claude?

Claude is an AI assistant created by Anthropic, a safety-focused artificial intelligence company founded in 2021 by former OpenAI researchers Dario Amodei and Daniela Amodei. Anthropic's mission is to build AI systems that are safe, beneficial, and understandable, and Claude is the primary product through which they deliver on that vision. Since its public launch in 2023, Claude has grown into one of the most capable AI assistants available, competing directly with OpenAI's ChatGPT and Google's Gemini across writing, coding, reasoning, and analysis tasks.

What sets Claude apart from competitors is its combination of a massive 200,000-token context window and a constitutional AI safety framework. The context window means you can paste in an entire novel, a full codebase, or hundreds of pages of legal contracts and Claude will process and reason about the entire document in a single conversation. Constitutional AI is Anthropic's approach to alignment: rather than relying solely on human feedback, Claude is trained with a set of principles that guide its behavior, making it less likely to produce harmful, biased, or misleading outputs while remaining genuinely helpful.

In 2025 and 2026, Anthropic expanded Claude's capabilities dramatically. Projects let you create persistent workspaces with custom instructions and uploaded knowledge bases, so Claude remembers your preferences and context across conversations. Artifacts allow Claude to generate interactive content — code previews, charts, documents, and applications — directly in the conversation window. And Claude Code, Anthropic's agentic command-line tool, can autonomously navigate codebases, execute terminal commands, edit files, run tests, create git commits, and handle complex multi-step software engineering tasks without a GUI.

Claude is available through multiple interfaces: the claude.ai web app, native desktop applications for Windows and macOS, mobile apps for iOS and Android, and the Anthropic API for developers building AI-powered applications. Anthropic offers three model tiers — Opus (most capable), Sonnet (balanced), and Haiku (fastest) — so users and developers can choose the right trade-off between intelligence, speed, and cost for their specific use case.

Key Features

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200K Context Window

Process up to 200,000 tokens — roughly 150,000 words or 500 pages — in a single conversation. Upload entire codebases, research papers, legal documents, or books and Claude will analyze, summarize, and answer questions about the full content without losing track of details buried deep in the text.

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Claude Code (Agentic CLI)

Claude Code is Anthropic's terminal-based coding agent. It reads your entire repository, understands project structure, writes and edits code across multiple files, runs tests, handles git operations, and executes complex multi-step development workflows autonomously — all from your command line.

🗂️

Projects & Artifacts

Projects let you create persistent workspaces with custom instructions and uploaded documents, so Claude retains context across sessions. Artifacts generate interactive previews — live code demos, data visualizations, formatted documents, and mini-applications — directly within the chat interface.

👁️

Vision & Document Analysis

Upload images, PDFs, charts, screenshots, and handwritten notes. Claude can read and interpret visual content, extract data from tables, describe images in detail, analyze charts, and compare multiple documents side by side. Ideal for processing scanned documents, UI mockups, and research figures.

🛡️

Constitutional AI Safety

Anthropic's constitutional AI approach trains Claude with explicit behavioral principles rather than relying solely on human preference data. The result is an assistant that is more predictable, less likely to produce harmful content, and better at following nuanced instructions — critical for enterprise and regulated industries.

🔌

API & Enterprise

The Anthropic API gives developers programmatic access to all Claude models with streaming responses, function calling, tool use, and batch processing. Enterprise features include SSO, SAML, SCIM, audit logs, role-based access controls, and a contractual guarantee that customer data is never used for training.

Pricing

Claude uses a tiered pricing model. The free plan provides access to Claude Sonnet with usage limits. Paid plans unlock higher-tier models, greater usage, and team collaboration features.

Plan	Price	Models	Key Features
Free	Free	Claude Sonnet	Basic usage limits, web & mobile access, vision, file uploads
Pro	$20 / month	Opus, Sonnet, Haiku	5x usage vs. free, Projects, Claude Code, priority access, early features
Team	$25 / user / month	Opus, Sonnet, Haiku	Everything in Pro + team workspace, admin dashboard, higher limits
Enterprise	Custom pricing	All models + custom	SSO, SAML, SCIM, audit logs, dedicated support, SLA, data isolation

Pricing as of April 2026. API usage is billed separately per token. Check claude.ai/pricing for current rates.

Pros & Cons

Pros

Industry-leading 200K context window processes entire books and codebases in one conversation
Claude Code CLI enables autonomous, agentic software development directly in the terminal
Constitutional AI safety framework reduces harmful outputs while maintaining helpfulness
Projects and Artifacts create persistent, interactive workspaces that retain context across sessions
Enterprise-grade security with SOC 2, SSO, SAML, and a no-training-on-data guarantee

Cons

Free tier has strict daily usage limits that power users will exhaust quickly
No native image generation — must use external tools for visual content creation
Plugin and integration ecosystem is smaller than ChatGPT's established marketplace
Opus model can be slower than competitors for simple tasks where speed matters more than depth

Alternatives to Claude

If Claude isn't the right fit for your workflow, here are four strong alternatives that cover different strengths and use cases.

ChatGPT

OpenAI's flagship assistant with GPT-4o, image generation via DALL-E, a massive plugin ecosystem, and the widest third-party integration support of any AI chatbot.

Gemini

Google's multimodal AI assistant with native integration across Google Workspace, Search, and Android. Excels at real-time information retrieval and multi-modal reasoning.

Perplexity

An AI-powered answer engine that combines large language models with real-time web search. Best for research tasks where you need cited, up-to-date information.

GitHub Copilot

GitHub's AI coding assistant powered by OpenAI. Works as a plugin in VS Code, JetBrains, and Neovim. Ideal for developers who want inline code completion without switching editors.

Frequently Asked Questions

What is Claude AI?

Claude is an AI assistant built by Anthropic, a safety-focused AI research company founded by former OpenAI researchers. It can handle conversations, write and debug code, analyze documents, summarize research, create content, and reason through complex multi-step problems. Claude is available through claude.ai, desktop and mobile apps, and the Anthropic API for developers building AI-powered products.

Is Claude AI free to use?

Yes. Claude offers a free tier with access to the Claude Sonnet model, which includes daily usage limits sufficient for casual use. The Pro plan at $20 per month unlocks significantly higher limits, access to the more powerful Claude Opus model, priority access during peak demand, Projects, Claude Code, and early access to new features. Team and Enterprise plans are available for organizations that need collaboration tools and compliance features.

How does Claude compare to ChatGPT?

Both Claude and ChatGPT are top-tier AI assistants, but they have different strengths. Claude offers a larger context window (200K tokens vs. 128K), stronger performance on long-document analysis and nuanced, careful writing, and Anthropic's constitutional AI safety approach. ChatGPT has a broader plugin ecosystem, native image generation with DALL-E, and deeper integration with Microsoft products. For coding, both are excellent — Claude Code offers terminal-based agentic development, while ChatGPT integrates with GitHub Copilot.

How large is Claude's context window?

Claude supports a 200,000-token context window as standard, which equals roughly 150,000 words or about 500 pages of text. This means you can upload entire books, full codebases, lengthy legal contracts, or dozens of research papers and Claude will process and reason about all of the content in a single conversation without losing critical details. Some enterprise configurations support up to 1 million tokens for specialized workloads.

Is Claude safe to use for business?

Yes. Anthropic designed Claude with enterprise security as a core requirement. The Enterprise plan includes SSO, SAML, SCIM provisioning, audit logs, role-based access controls, and a contractual commitment that customer data is never used for model training. Claude is SOC 2 Type II compliant. The constitutional AI framework also reduces the risk of generating harmful, biased, or non-compliant content in regulated business environments like finance, healthcare, and legal.

What Claude models are available?

Anthropic offers three model tiers. Claude Opus is the most capable, designed for complex reasoning, multi-step analysis, and advanced coding tasks. Claude Sonnet is the balanced default model, offering strong intelligence at faster speeds and lower cost. Claude Haiku is the fastest and most affordable option, best for simple tasks, classification, and high-volume API applications. Each tier receives regular updates — the current generation includes Claude 4 Opus, Claude 4 Sonnet, and Claude 4 Haiku.

Can Claude write and debug code?

Absolutely. Claude is one of the most capable coding assistants available and supports every major programming language including Python, JavaScript, TypeScript, Rust, Go, Java, C++, and many more. It excels at code generation, debugging, refactoring, code review, and explaining complex logic. Claude Code, Anthropic's agentic CLI tool, takes this further by autonomously navigating codebases, running terminal commands, editing multiple files, executing tests, and creating git commits — handling entire development workflows from the command line.