Claude

Claude is an AI assistant developed by Anthropic, officially launched in 2023. Anthropic is an AI safety company founded by former OpenAI researchers, headquartered in San Francisco. Claude is positioned as The AI for Problem Solvers, emphasizing powerful capabilities while maintaining safety, honesty, and harmlessness.

Claude supports a wide range of use cases including complex reasoning, long-context document analysis, code writing and debugging, creative writing, and data analysis. Its target users span individuals, professionals, developers, and enterprise teams.

Anthropicintroduced Character Training into its alignment fine-tuning process, giving Claude richer personality traits such as curiosity, open-mindedness, and thoughtfulness. Claude currently offers multiple model versions: Opus 4.6 (most powerful), Sonnet 4.6 (balanced), and Haiku 4.5 (fastest), accessible via web, iOS, Android, desktop clients, and API.

Core Features

• Extended Context Window: Supports up to 200K tokens of context (500K for Enterprise), enabling processing of entire books, full codebases, or lengthy reports in a single session without manual chunking.
• Code Generation and Debugging (Claude Code): Available on Pro and above, supports Python, JavaScript, TypeScript, Go, Rust, and more. Can generate complete project structures, explain complex logic, locate bugs, and provide fixes. Integrates directly into terminal development environments.
• Web Search: All plans include web search capability, enabling real-time internet retrieval for up-to-date information, overcoming knowledge cutoff limitations.
• Deep Research: Available on Pro and above, enables multi-step in-depth research on complex topics, automatically synthesizing information from multiple sources into structured reports.
• Extended Thinking: Available on all plans, Claude performs deeper reasoning before responding, significantly improving quality for complex math, logic, and analytical tasks.
• Multimodal Understanding: Analyzes uploaded images, PDFs, Word documents, and other file formats, extracting key information, summarizing content, or answering document-based questions.
• Cowork: Available on Pro and above, lets Claude autonomously handle multi-step tasks so users can focus on higher-priority work.
• Memory: Available on Pro and above, Claude remembers user preferences and important context across conversations, eliminating the need to repeat background information.
• Connectors: Supports connecting Slack, Google Workspace, Microsoft 365, and other external services via remote MCP for cross-platform data integration.
• Office Integration: Pro includes Claude in Excel; Max includes Claude in PowerPoint (research preview); Claude in Chrome extension available for in-browser assistance.

Quick Start

1. Access Claude: Go to claude.ai or download the desktop/mobile client. Sign up with Google or email - the free plan requires no credit card.
2. Choose a Plan: The free plan is sufficient to get started. Upgrade to Pro ($17/month annual) or Max ($100/month+) for more usage and advanced features.
3. Start a Conversation: Type your question or task in the input box. Upload files (PDFs, images, code files) as context - drag and drop is supported.
4. Create Projects: Pro and above support unlimited projects. Organize related conversations and files in one project; Claude maintains context consistency throughout.
5. Use Tools: Click the tool icon next to the input box to enable web search, code execution, file creation, and other capabilities as needed.
6. Connect External Services: Configure Connectors in settings to integrate Slack, Google Drive, and other services for cross-platform queries.

Tips and Best Practices

• Provide Role and Context: Start conversations by telling Claude your role and goal for more targeted responses.
• Leverage Projects: Group related tasks in one project and upload reference documents as a knowledge base. Claude maintains consistent context across the entire project.
• Enable Extended Thinking: For complex math, logical reasoning, or multi-step analysis, enabling extended thinking mode significantly improves response quality.
• Iterate and Refine: If a response is not satisfactory, tell Claude specifically what needs improvement - it will adjust without requiring a fresh conversation.
• Use Claude Code: Pro users can use Claude Code in the terminal to collaborate on writing and debugging code directly in their local development environment.

Key Advantages

• Safety and Honesty Leadership: Anthropic prioritizes AI safety research. Claude is trained with Constitutional AI, refusing harmful requests while remaining honest - it will not fabricate answers to please users. Claude is more likely to acknowledge uncertainty than hallucinate, which is critical in professional contexts.
• Superior Long-Context Handling: Standard plans support 200K token context; Enterprise supports 500K tokens - far exceeding GPT-4o 128K limit. Ideal for long document analysis, large codebase review, and full-book comprehension.
• Rich Personality Traits: Anthropic Character Training gives Claude genuine curiosity, open-mindedness, and nuanced expression. Conversations feel more natural and substantive, more like consulting an expert than querying a search engine.
• Strong Coding Capabilities: Claude excels at code generation, debugging, and explanation. Claude Code integrates directly into development workflows, supporting complex code collaboration in terminal environments.
• Multi-Platform Coverage: Available on web, iOS, Android, macOS and Windows desktop clients, and Chrome extension - seamless switching across all devices.
• Enterprise-Grade Security: Team and Enterprise plans do not use content for model training by default. Supports SSO, SCIM, audit logs, IP allowlisting, and HIPAA compliance for regulated industries.

Pricing Plans

Plan	Price	Key Features	Best For
Free	$0/month	Web/iOS/Android/desktop chat, code generation, image analysis, web search, file creation, extended thinking	Casual individual users
Pro	$17/month (annual, $200/year) or $20/month	Everything in Free + more usage, Claude Code, Cowork, unlimited projects, Research, memory, more models, Claude in Excel, Claude in Chrome	Daily power users
Max	From $100/month	Everything in Pro + 5x or 20x more usage, higher output limits, early access to advanced features, priority access, Claude in PowerPoint	Heavy users and professionals
Team Standard	$20/seat/month (annual) or $25/month	All Claude features + more usage than Pro, SSO, admin controls, Microsoft 365/Slack connectors	Teams of 5 to 150
Team Premium	$100/seat/month (annual) or $125/month	Everything in Standard + 5x more usage	High-usage team members
Enterprise	Contact sales	Everything in Team + 500K context, SCIM, audit logs, IP allowlisting, HIPAA-ready	Large enterprises

API Pricing (per million tokens):

Model	Input (up to 200K)	Output (up to 200K)
Opus 4.6	$5/MTok	$25/MTok
Sonnet 4.6	$3/MTok	$15/MTok
Haiku 4.5	$1/MTok	$5/MTok

• Requests exceeding 200K tokens are priced higher: Opus 4.6 input $10/MTok, output $37.50/MTok
• Web search tool: $10/1K searches; Code execution: $0.05/hour/container (50 free hours/day per org)
• Pro annual plan saves about 15% vs monthly ($200/year vs $240/year)
• API and subscription plans are billed separately

Get Help

• Official Help Center: support.claude.com - Covers Claude usage guides, paid plan details, team and enterprise plans, API docs, mobile apps, privacy and legal, and more across 18 categories with hundreds of articles.
• API Documentation: docs.claude.com - Complete API reference for developers, including quickstart, model list, prompt design guides, tool use, and streaming output.
• Release Notes: support.claude.com/en/articles/12138966-release-notes - Tracks feature updates and improvements across Claude versions.
• Submit Support Request: Visit support.claude.com/en/articles/9015913-how-to-get-support to contact customer support. Paid plan users receive priority responses.
• Twitter/X: @AnthropicAI - Official Anthropic account for product announcements, research updates, and feature releases.
• Enterprise Support: Enterprise plan customers have access to dedicated support channels for customized deployment and compliance consulting.
• Anthropic Website: anthropic.com - Research publications, safety reports, news announcements, and career opportunities.

Download Clients

• macOS Desktop: Visit anthropic.com/claude and click Download for macOS. Supports both Apple Silicon and Intel chips.
• Windows Desktop: Same page offers Windows (x64) and Windows (arm64) downloads for different architectures.
• iOS (iPhone/iPad): Search Claude on the App Store, or use the App Store link at anthropic.com/claude. Supports iPhone and iPad.
• Android: Search Claude on Google Play, or use the Google Play link at anthropic.com/claude. Supports Android phones and tablets.
• Chrome Extension (Claude in Chrome): Available on Pro and above. Search Claude in the Chrome Web Store to install. Enables in-browser summarization, translation, and Q&A while browsing.
• Web: No download needed - visit claude.ai directly in any major browser (Chrome, Firefox, Safari, Edge).

Additional Information

• Release History: Claude 1 launched March 2023; Claude 2 in July 2023; Claude 3 family (Haiku, Sonnet, Opus) in March 2024; Claude 3.5 Sonnet in June 2024; Claude 4 series in 2025. Current latest versions are the Claude 4.6 family (Opus 4.6, Sonnet 4.6, Haiku 4.5).
• Company Background: Anthropic PBC was founded in 2021 by Dario Amodei (CEO), Daniela Amodei (President), and other former OpenAI researchers. Headquartered in San Francisco, the company has received major strategic investments from Google and Amazon, with a focus on AI safety research.
• Constitutional AI: Anthropic proprietary training methodology that uses a set of explicit principles to guide model behavior, achieving a better balance between safety and helpfulness - a core technical differentiator for Claude.
• Data Privacy: Free and Pro plan conversations may be used to improve models (can be disabled in account settings). Team and Enterprise plans do not use content for model training by default. Data deletion requests are supported per Anthropic privacy policy.
• Supported Languages: Claude supports multiple languages including English, Chinese (Simplified/Traditional), Japanese, Korean, French, German, Spanish, Portuguese, and more. English performance is strongest; Chinese capability is also strong.
• Competitive Positioning: Compared to ChatGPT (OpenAI), Claude has advantages in long-context handling, code quality, and honesty. Compared to Gemini (Google), Claude offers a more natural conversational experience with more distinct personality. API pricing is comparable to GPT-4o but with a larger context window.
• Known Limitations: Free plan has daily usage limits with possible wait times during peak hours. Claude declines certain sensitive topics. Knowledge has a training cutoff date, though web search can retrieve current information.