Claude is a family of large language models (LLMs) developed by Anthropic, designed as a safe, accurate, and helpful AI assistant for tasks like writing, coding, research, and analysis.[1][6]
Key Features
Claude excels in natural conversations, summarization, editing, Q&A, decision-making, code generation, and handling large contexts up to 100,000+ tokens, including PDFs and documents. It supports multilingual translation, step-by-step reasoning, voice dictation, and tools like Claude Code for terminal-based coding and multi-file edits. Available via web at claude.ai, mobile apps on iOS/Android, and integrations for developers.[3][5][6][7][9]
Model Versions
- Claude 1 (March 2023): Initial release with basic proficiency but limits in coding/math.[6]
- Claude 2 (July 2023): Expanded context to 100,000 tokens; public access.[6]
- Claude 3.7 Sonnet (February 2025): Hybrid reasoning model for speed vs. depth control.[6]
- Claude Opus 4.5 (November 2025): Top model for coding, agents, and enterprise workflows.[4][6]
Comparisons and Access
Claude compares to ChatGPT, with Instant akin to GPT-3.5 (fast/cheap) and Opus to GPT-4 (advanced). It emphasizes ethics via "constitutional AI" training and lacks native image generation or real-time web access beyond prompts. Free tier available; pro plans unlock advanced models and features like Projects and Skills.[5][8][1][6]
