Claude 4.5 Sonnet is here 💥

Anthropic has launched Claude Sonnet 4.5, setting new benchmarks for real-world coding and agent development.

✨ What’s new:

• Best-in-class coding on SWE-bench Verified and OSWorld
• Checkpoints in Claude Code to roll back instantly
• New Agent SDK — build advanced AI agents with Claude’s infrastructure
• Expanded context & memory tools for longer, more complex tasks
• Improved safety & alignment, with stronger defenses against prompt injection

👉 Learn more about Claude Code 4.5
🎬 Theo - t3․gg Video Overview

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