Anthropic Claude 4 Sonnet: Extended Context, Computer Use & Major Performance Leap

Anthropic has released Claude 4 Sonnet, offering a 500K token context window, significantly improved computer use capabilities (navigate browsers and GUIs autonomously), and 15% better performance across coding, analysis, and reasoning benchmarks. Claude 4 introduces Projects feature for persistent memory across conversations, improved artifact generation (code, documents, data visualizations), and a new "thinking" mode that shows the model's reasoning process. Available via API and Claude.ai with immediate availability; claude-sonnet-4 becomes the default model in Anthropic's consumer app.