Claude Sonnet 5

🤖 Anthropic just unveiled Claude Sonnet 5, its smartest and most agentic Sonnet yet. The model can plan multi-step tasks, browse the web, use terminals and other tools, and work autonomously on problems that only much larger, more expensive AI models could handle a few months ago. Compared to Sonnet 4.6, it delivers major gains in reasoning, coding, tool use, and knowledge work while approaching the performance of Opus 4.8 at a much lower cost. Early testers say Sonnet 5 completes complex tasks that previous versions couldn’t finish, double-checks its own work without being prompted, and offers one of the best price-to-performance ratios for AI agents today.

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