The Claude Family
Claude is Anthropic's series of AI assistants, designed with safety and helpfulness as core priorities.
Model Versions
Claude 1 (2023): Anthropic's first public model, noted for its careful, nuanced responses and willingness to express uncertainty.
Claude 2 (2023): Major improvements in coding, math, and reasoning. Introduced a 100K token context window — far larger than competitors at the time.
Claude 3 (2024): Released in three tiers — Haiku (fast/cheap), Sonnet (balanced), and Opus (most capable). Claude 3 Opus matched or exceeded GPT-4 on most benchmarks.
Claude 4 (2025): Significant advances in agentic capabilities, extended thinking for complex reasoning, and improved code generation.
Key Strengths
Long Context: Claude supports very large context windows, making it ideal for analyzing long documents, codebases, and research papers.
Instruction Following: Claude is known for carefully following detailed instructions and producing well-structured outputs.
Safety: Trained using Constitutional AI, Claude tends to be more measured in sensitive topics while remaining genuinely helpful.