Claude Code on Google Cloud's Agent Platform changedgoogle-vertex-ai
Nearest release: v2.1.234, published 5 hours before this site recorded the change. Shown because the two are within 24 hours of each other. Nothing here says the release caused the edit.
Recorded here
Lines+5added
Lines−0removed
From line
186
where the diff opens
First seen
14 Aug 2026
this site's first read of the page
Recorded edits19to this page, all time
The whole hunk
from line 186, old and new numbered
/
from line 186
186186
187187Most model versions have a corresponding `VERTEX_REGION_CLAUDE_*` variable. See the [Environment variables reference](/docs/en/env-vars) for the full list. Check [Google Cloud's Agent Platform Model Garden](https://console.cloud.google.com/vertex-ai/model-garden) to determine which models support global endpoints versus regional only.
188188
189If a region value isn't shaped like a region or location name, Claude Code treats it as unset. For example, Claude Code treats a value containing a slash, dot, or space as unset. Claude Code falls back to a different source for each variable:
190
191* `VERTEX_REGION_CLAUDE_*`: Claude Code falls back to `CLOUD_ML_REGION`.
192* `CLOUD_ML_REGION`: Claude Code falls back to `us-east5`.
193
189194[Prompt caching](/docs/en/prompt-caching) is enabled automatically. To disable it, set `DISABLE_PROMPT_CACHING=1`. To request a 1-hour cache TTL instead of the 5-minute default, set `ENABLE_PROMPT_CACHING_1H=1`; cache writes with a 1-hour TTL are billed at a higher rate. For heightened rate limits, contact Google Cloud support. When using Google Cloud's Agent Platform, the `/logout` command is unavailable since authentication is handled through Google Cloud credentials.
190195
191196Claude Code decides between [MCP tool search](/docs/en/mcp#scale-with-mcp-tool-search) and upfront loading by model generation:
No line in this hunk matches that.