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BREAKING: Anthropic Releases Claude Sonnet 4.5 – World’s Best Coding Model

Anthropic has just announced Claude Sonnet 4.5, positioning it as the world’s best coding model with breakthrough capabilities in agent building, computer use, and advanced reasoning.

Model Capabilities:
– Strongest model for building complex agents
– Best-in-class performance at using computers
– Substantial improvements in reasoning and mathematical tasks
– Can run autonomously for 30+ hours of continuous coding

Claude Code Upgrades:
– Redesigned terminal interface with fresh UI
– New VS Code extension bringing Claude directly into IDEs
– Revolutionary checkpoints feature for running large tasks with instant rollback capability
– Code execution for data analysis, file creation, and visualization across standard formats
– Now available to all paid plans in preview

API Enhancements:
Two new agent-building capabilities to handle long-running tasks:
– Context editing – Automatically clears stale context
– Memory tool – Stores and accesses information outside context window limits

Pricing remains the same as Sonnet 4