Anthropic has introduced Claude 4, a new generation of AI models, including Claude Opus 4 and Claude Sonnet 4, which offer improved coding, reasoning, and AI agent capabilities. The models feature extended thinking with tool use, parallel tool execution, and memory improvements. Claude Code, a development tool, is now generally available and integrates with VS Code and JetBrains. The new models are available on the Anthropic API, Amazon Bedrock, and Google Cloud's Vertex AI.