Claude
Claude is a large language model (LLM) developed by Anthropic, engineered to be safe, helpful, and ethically aligned. It serves as a versatile assistant across chat, coding, research, and API use cases.
See it in Action
What it does
Claude is a transformer-based LLM trained under Anthropic’s safety-first constitution methodology. It’s designed for conversational assistance that balances helpfulness, honesty, and harmlessness. Users can interact via chat, code execution environments, collaborative documents (“Cowork”), and research workflows, addressing business problems from creative writing to technical analysis.
Claude supports agentic tool use: it can invoke structured tools (like bash, file editing, web search) via schema contracts, where the model picks the operation, your system executes it, and feeds results back into the conversation. This enables safe integration with real-world workflows and APIs.
Key Features
- Agentic Tool Use: Claude decides which operations to invoke via pre-defined schemas, enabling integration with shell commands, file editing, memory, browser control—supporting automation without executing unvalidated code. Strategic value: empowers developers to embed Claude as a functional assistant in their apps.
- Research Mode: activated in paid plans, it conducts iterative searches across internal and web sources, auto-structures responses with citations. Strategic value: ensures accurate, verifiable information for research-intensive workflows.
- Artifacts (Nested Apps): Claude can generate interactive mini-apps within the chat interface that call Claude’s API themselves. Strategic value: streamlines creation of live tools and dashboards inside the user conversation.
- Multiple Models (Sonnet, Opus, Fable): supports a range of models with trade-offs in latency and capability—Sonnet 5 is default for Free/Pro; Opus 4.8 and Fable 5 available with advanced work. Strategic value: users can optimize for performance, cost, or capability.
Who it is for
• Knowledge Workers & Researchers: Research mode with citations suits analysts, journalists, and academics needing verified information.
• Developers & Automation Engineers: Agentic tool use and Claude Code support scripting, code execution, and building AI agents.
• Productive Individuals: Projects, memory, design and cowork features help professionals manage tasks across chat, docs, and internal workflows.
• Enterprises & Teams: Team and Enterprise tiers provide SSO, admin controls, compliance, connectors, and organization-wide governance capabilities.
How it works
1. Sign up through claude.ai, desktop (Mac/Windows), or mobile (iOS/Android).
2. Choose plan: Free, Pro, Max, Team, or Enterprise.
3. Interact via chat—prompts can be conversational or structured.
4. Claude may invoke tools via schemas; your integration handles execution and returns results.
5. For research, enable Research mode to let Claude run iterative searches and cite sources.
6. Use Artifacts to generate mini-apps within the chat that can call Claude APIs.
7. Manage projects, memory, and workflows through dashboard features; access custom models based on your plan.
Pros
- Safety-first model trained under Anthropic’s constitutional AI framework.
- Agentic tool integration enables real-world action through structured schema calls.
- Research feature outputs verifiable, citation-backed responses.
- Artifacts allow building interactive mini-applications inside chat.
Cons
- Usage quotas reset on rolling windows—limits may interrupt long sessions.
- Advanced models (Opus, Fable) and higher usage tiers require paid plans.
- API-style pricing for tokens can become expensive at scale.
Pricing Overview
Claude offers a tiered pricing logic across plan types:
- Individual Plans—Free tier for basic use; Pro subscription adds capacity and features; Max plans (5× or 20×) offer extended session capacity and priority access.
- Team & Enterprise plans—seat-based billing with options for standard or premium capacities, includes governance, integrations, audit, and compliance features.
- API model usage is token-based: Sonnet 5 has introductory low-rate pricing through August 31, 2026; Opus and Fable models carry higher token-based costs. Enterprise usage is billed per token plus seat.
Frequently Asked Questions
What models does Claude use by default?
Sonnet 5 is the default across Free and Pro plans. Higher-tier plans unlock Opus 4.8 and Fable 5 for more complex tasks.
How do I get Claude to research with citations?
Enable Research mode in the plan interface (available in paid plans) and prompt Claude to use the Research tool—Claude then iteratively searches and cites sources.
Can Claude execute code or run file operations?
Yes—Claude uses agentic tool use via schemas (e.g. bash, file editor); your system executes the operations based on Claude’s structured request.
What are Artifacts?
Artifacts are interactive mini-applications generated within the Claude chat interface that can make nested Claude API calls and run live inside your conversation.
What pricing model applies to API usage?
Model use is billed by token for API access: Sonnet 5 has introductory low rates through August 31, 2026; Opus and Fable are higher cost per million tokens. Enterprise includes seat fee plus usage.