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 analysis into final deliverables and actionable insights.

We’re also announcing Vertex AI support for Anthropic’s upgrades to Claude Code—including a VS Code extension and the next version (2.0) of the terminal interface, complete with checkpoints for more autonomous operation. Powered by Claude Sonnet 4.5, Claude Code now handles longer, more complex development tasks than the previous version.

Get started

Start building with Claude Sonnet 4.5 today by following these instructions:

1. Navigate to the Claude Sonnet 4.5 model card in the Vertex AI Model Garden, select “Enable”, and follow the proceeding instructions. You can also find and easily procure Claude Sonnet 4.5 on Google Cloud Marketplace.
2. Explore our sample notebook for help getting started.
3. Visit our documentation for pricing and regional support details.

The Vertex AI advantage: production-ready agents and applications

Bringing powerful models like Claude Sonnet 4.5 to production quickly requires more than just API access; it requires a unified AI platform. Vertex AI gives you an all-in-one platform to build, deploy, and manage your AI with confidence:

• Orchestrate multi-agent systems: Build agents with a flexible, open approach through Agent Development Kit (ADK), then scale them in production with Agent Engine.
• Get committed capacity: Reserve dedicated capacity and prioritized processing for your Claude Sonnet 4.5 applications at a fixed cost. This is made possible with provisioned throughput. To get started, contact your Google Cloud sales representative.
• Boost model performance and efficiency: Get the most out of Claude with supported features. Run large-scale jobs with batch predictions, analyze codebases with a 1 million token context window, reduce costs with prompt caching, and ground responses with citation support. For detailed information on Claude-supported features, refer to our documentation.
• Deploy with highly efficient infrastructure: Deploying on Vertex AI means running on infrastructure that is purpose-built for AI and designed to provide optimal performance and cost across your workloads. The global endpoint for Claude also enhances availability and reduces latency by dynamically serving traffic from the nearest available region.

Operate securely, by design: Build securely from day one, knowing your data is protected and you can easily manage compliance. This is provided by Vertex AI and Google Cloud’s robust, built-in security and data governance controls.

How customers are building with Claude on Vertex AI

Leading organizations are already leveraging the powerful combination of Claude and Google Cloud to drive significant business impact.

Augment Code is powering its AI coding assistant, which helps developers navigate and contribute to production-grade codebases, with Claude on Vertex AI.

“What we’re able to get out of Claude is truly extraordinary, but all of the work we’ve done to deliver knowledge of customer code, used in conjunction with Claude and the other models we host on Google Cloud, is what makes our product so powerful.” – Scott Dietzen, CEO, Augment Code

spring.new is helping users build custom business applications and tools in hours using natural language prompts.

“Customers tell us that our platform, powered by Claude models and Google Cloud, enables one person to create applications in one to two hours that previously took up to three months.” – Amitay Gilboa, CEO, spring.new

TELUS built its generative AI platform, Fuel iX™, on Google Cloud to give its team members a choice of curated AI models, like Claude, inspiring engineering excellence and enterprise-wide productivity.

“Getting a model as powerful as Claude on Vertex AI is a win-win that makes life so much easier. We get a model that excels at tool calling on a comprehensive platform that integrates with our core Google Cloud workloads like GKE and Cloud Run — that’s the magic.” – Justin Watts, Distinguished Engineer, TELUS