# Claude

> Anthropic's AI assistant for analysis, writing, and complex reasoning tasks.

Claude is Anthropic's AI assistant family spanning Haiku (fast, lightweight), Sonnet (balanced), and Opus (most powerful), with the latest models being Sonnet 5 and Opus 4.8, both released in 2026. Sonnet 5 (June 30, 2026) is the default model on Free and Pro plans, achieving a 63.2% SWE-bench Pro score and excelling at coding, analysis, and knowledge work. Opus 4.8 (May 28, 2026) is the workhorse flagship for the most demanding long-horizon agentic and reasoning tasks. All models support up to a 1M token context window, vision and image understanding, and an extended thinking mode for hard multi-step problems. Claude Code is Anthropic's agentic coding tool that runs in your terminal and operates across your full codebase. Available at claude.ai and via API, Claude is recognized for exceptional nuanced reasoning, reliable instruction-following, and Anthropic's Constitutional AI safety approach.

## Quick facts

- Categories: Chatbots, Code Assistant, Writing, AI Assistant, Developer Tools, Research
- Pricing: Freemium (free plan + paid tiers)
- Free plan: Yes
- Official site: https://claude.ai
- Last checked: 2026-10-22

## Key features

- Sonnet 5 — default Free/Pro model, state-of-the-art coding and knowledge work (released Jun 30, 2026)
- Opus 4.8 — flagship model for complex reasoning and long-horizon agentic coding
- Up to 1M token context window across the model family
- Extended thinking mode for hard multi-step problems
- Claude Code: agentic coding tool that runs in your terminal with full codebase context
- Vision, image, and document understanding on all tiers

## Use cases

- Analyzing long documents and reports
- Writing and editing long-form content
- Code review and generation
- Research and summarization
- Complex problem analysis

## Links

- Nextool.ai page: https://nextool.ai/tools/claude-anthropic/
- Alternatives: https://nextool.ai/alternatives/claude-anthropic/

Source: Nextool.ai (https://nextool.ai/tools/claude-anthropic/). Pricing and features change; confirm on the provider's site before relying on them.