Anthropic Claude Sonnet 4.5 (200k/1M beta)

Anthropic's leading models include the Claude 3.5 series, with Claude 3.5 Opus (or a successor) as the most powerful, Claude 3.5 Sonnet providing a balance of intelligence and speed, and the older Claude 3 Haiku for fast, cost-effective tasks. These models are known for their strong reasoning, coding, and safety features, often with large context windows (e.g., 200K+ tokens).

Artifacts are a feature introduced with Claude 3.5 Sonnet that allows the model to generate and display rich content like code snippets, text documents, or website designs in a dedicated, interactive workspace next to the chat. This enables users to see, iterate on, and integrate Claude's creations into their projects more seamlessly.

Anthropic places a strong emphasis on AI safety, employing techniques like Constitutional AI. This involves training models based on a set of principles (a "constitution") to guide their behavior towards being helpful, harmless, and honest. They also focus on techniques to reduce harmful outputs and improve model controllability.

Claude models are generally praised for their strong conversational abilities, long-context understanding, nuanced reasoning, coding proficiency, and a cautious approach to potentially harmful queries. They are often favored for tasks requiring deep document analysis, creative writing, and thoughtful interaction.