Claude Sonnet 4.5 is now available on Vercel AI Gateway with full support in AI SDK. We’ve been testing the model in v0, across our Next.js build pipelines, and inside our new Coding Agent Platform template. The model shows improvements in design sensibility and code quality, with measurable gains when building and linting Next.js applications.
Claude Sonnet 4.5 builds on Anthropic's strengths in reasoning and coding. When paired with the Vercel AI Cloud, it powers a new class of developer workflows where AI can plan, execute, and ship changes safely inside your repositories.