Claude (Anthropic)

Anthropic's Claude has become the preferred AI for long-form analysis, research, and writing tasks. Claude's 200K token context window means it can process entire books, codebases, or research papers in a single conversation. Claude 3.5 Sonnet is widely regarded as the best model for coding tasks, and Claude Opus leads on complex reasoning. The "artifacts" feature creates interactive documents, code, and visualizations directly in the conversation. Claude's "Constitutional AI" approach produces fewer hallucinations and more nuanced outputs than competitors. Over 10 million users, with particular strength in enterprise, legal, and academic use cases.