Claude

Claude is a suite of large language models developed by Anthropic, built using “constitutional AI” alignment for ethical compliance and robust reasoning. It spans three core tiers—Haiku, Sonnet, and Opus—optimized for varied capability and performance levels. Mythos-class models like Fable 5 offer agentic task execution with tool integration, enabling users to delegate plans, browser activity, coding and autonomous tasks.

Claude solves business problems such as analyzing very long documents, generating code, conducting research, and automating workflows. With extended token context (up to 200 K or more), it supports deep multi-step reasoning and long-form tasks beyond what conventional chatbots handle.

Recent updates: Sonnet 5, released in early July 2026, is now the default for Free and Pro users—it delivers planning, autonomous tool use (browsers, terminals), and enhanced agentic coding, outperforming Sonnet 4.6 in agentic tests (80.5 % vs. 67 %) using Terminal‑bench 2.1. Fable 5, the most capable model, remains available across Claude.ai, Claude Platform, Claude Code, and Claude Cowork after export controls were lifted in July 2026.

• Agentic Execution (Sonnet 5): Executes plans and uses tools autonomously—enhancing productivity in coding and professional workflows.
• Extended Context Capacity: Handles long documents and codebases using up to 200K tokens, supporting in-depth reasoning and context-heavy tasks.
• Tiered Model Scaling: Offers tiers from Haiku (fast/light) through Sonnet (balanced) to Opus and Fable/Mythos (deep reasoning and autonomous agents) to match user needs.
• Claude Code Integration: Built-in terminal/CLI coding agent enabling code generation and execution directly in developer workflows.
• Robust Safety Controls: Implements safeguard frameworks—e.g., safety filtering in Opus 4.7, permission gating in Claude Code (false positive rate 0.4%, false negative rate 17%).

• Developers & Software Engineers: Use Claude Code and agentic models to generate, debug, and execute code with terminal access.
• Knowledge Workers & Researchers: Benefit from long-context reasoning for analyzing complex documents, reports, and data.
• Professional Writers & Analysts: Leverage Sonnet 5 for structured planning, writing, and tool-assisted workflows.
• Enterprise Teams: Team and Enterprise plans provide SSO, admin controls, audit logs, and scalable usage across users.

• Account Setup: User signs up on Claude.ai and selects a plan (Free, Pro, Max, Team, Enterprise).
• Model Selection: The system defaults to Sonnet 5 for Free/Pro; users can switch to Opus 4.8 or Fable 5 where allowed.
• Input Prompt: User writes a query, uploads a document, or invokes Claude Code for CLI-based tasks.
• Agentic Step Execution: Sonnet 5 interprets the request, plans multi-step actions, optionally uses tools (browser, terminal), and executes.
• Output Delivery: Claude returns text, code, or results. For coding, it may output runnable scripts or terminal interactions.
• Memory & Projects: Higher-tier plans retain conversation memory, allow project organization, and provide persistent context.

Claude pricing operates on tiered subscriptions and usage-based API billing.

• Subscription Tiers: Free, Pro (monthly/annual), Max (power users), Team (standard/premium seat-based), and custom Enterprise plans. Free tier offers basic access; Pro boosts usage; Max delivers 5× or 20× capacity; Team adds collaboration controls.
• API Pricing: Token-based pricing varies by model: Haiku (~lowest cost), Sonnet (~mid), Opus (~higher), Fable 5/Mythos (highest). Prompt-caching reduces cost through read/write multipliers.
• Free Trial/Freemium: A free tier exists; pricing scaled by usage rather than exact dollar amounts for tiers.