Announcing Claude Sonnet 4.5 on Vertex AI

Today, we’re announcing the general availability of Claude Sonnet 4.5, Anthropic’s most intelligent model and its best-performing model for complex agents, coding, and computer use, on Vertex AI.

Claude Sonnet 4.5 is built to work independently for hours, maintaining clarity while orchestrating tools and coordinating multiple agents to solve complex problems. It’s designed to excel at long-running tasks with enhanced domain knowledge in coding, finance, research, and cybersecurity. Key use cases include:

• Coding: Autonomously complete long-horizon coding tasks. Plan and execute software projects that span hours or days, as well as everyday development tasks.
• Cybersecurity: Deploy agents that autonomously patch vulnerabilities before exploitation, shifting from reactive detection to proactive defense.
• Financial analysis: Handle everything from entry-level financial analysis to advanced predictive analysis like continuously monitoring global regulatory changes and preemptively adapting compliance systems.
• Research: Handle tools, context, and deliver ready-to-go office files to drive expert ...