Anthropic just dropped Claude 4.5 Sonnet and the benchmarks are significant. Coding performance up 18% vs 3.5, vision understanding jumping ahead of GPT-4o on several tasks. But the real story: the extended thinking mode. This isn't just "chain of thought" — it's genuine multi-step reasoning that makes agentic workflows actually reliable. If you're building AI tools, the shift from chatbot-style to agent-style is no longer theoretical. The companies that adapt fastest win.