Claude is an AI assistant developed by Anthropic, a safety-focused AI company. It is widely regarded as producing the most natural, nuanced and thoughtful responses of any frontier AI model — making it particularly valued for writing, analysis, research and complex reasoning tasks.
As of 2026, Claude's model family includes Haiku (fast and efficient), Sonnet 4.6 (the workhorse — leading SWE-bench coding benchmarks at $3/$15 per million tokens) and Opus 4.6 (the most capable — achieving the highest published score on PhD-level science reasoning). A 1-million-token context window allows Claude to process book-length documents in a single session.
Claude is accessible via claude.ai for individuals, through a Team plan for businesses, and via the Anthropic API for developers. Claude Code — a terminal-based agentic coding tool — is available from the Pro tier upwards and has become a favourite among professional developers for autonomous multi-file coding tasks.
Anthropic's Constitutional AI approach means Claude is notably more cautious and honest about its limitations compared to competitors, which builds user trust over time.
Writers, Researchers, Developers, Analysts, Legal Professionals, Students, Business Teams
| Plan | Price | Key features |
|---|---|---|
| Free | $0/month | Limited Claude Sonnet 4.6 access, basic web search, Artifacts |
| Pro | $20/month | 5x usage, all models including Opus 4.6, Claude Code, Projects |
| Max 5x | $100/month | 5x Pro usage — for developers running intensive Claude Code sessions |
| Max 20x | $200/month | 20x Pro usage — effectively unlimited for individual power users |
| Team | $25/user/month | Collaboration features, shared Projects, admin controls, priority access |
| Enterprise | Custom pricing | SSO, audit logging, custom context windows, compliance APIs |
Claude is the AI tool that consistently earns the most praise for the quality of its reasoning and writing. If ChatGPT is the Swiss Army knife, Claude is the scalpel — extraordinarily precise for tasks requiring nuance, analysis and long-form content. The 1M token context window is genuinely unique and invaluable for anyone working with long documents. No affiliate programme exists, but Claude drives enormous search traffic and is essential for AI Tool Bible's credibility. A must-have listing.