Anthropic · 2026-11-10 · notable
Claude Code 2.1.322 — fast mode comes to Google Vertex AI
In short
Claude Code 2.1.322 adds fast mode on Google Vertex AI in the global, us and eu regions. When Vertex refuses a fast request, Claude Code falls back to standard speed instead of failing.
Anthropic · 2026-11-10 · 1 source checked
Claude Code 2.1.322 lets teams on Google Vertex AI use fast mode, with a safe fallback to normal speed.
What is it?
Fast mode on Google Vertex AI is the one change in Claude Code 2.1.322. It works in the Vertex global, us and eu regions, so teams that reach Claude through Google Cloud get the faster output mode as well.
How does it work?
When a session runs in fast mode on Vertex, Claude Code asks Vertex for fast serving. If Vertex refuses the request, the CLI falls back to standard speed on the same session instead of stopping with an error.
Why does it matter?
Companies that buy Claude through Google Cloud no longer have to choose between their Vertex billing setup and the faster output that direct API users get. The fallback means a refused fast request does not break an agent run.
Who is it for?
Claude Code users who run Claude through Google Vertex AI
Try it
npm i -g @anthropic-ai/claude-code@2.1.322