global endpoint opus4 (#4128)

Author: denisj3030

notebooks/official/generative_ai/anthropic_claude_intro.ipynb

@@ -105,7 +105,7 @@
         "\n",
         "This notebook shows how to use **Vertex AI API** and **Anthropic’s Vertex SDK for Python** to call the Claude models on Vertex AI API.\n",
         "\n",
-        "For more information, see the [Use Claude](https://cloud.google.com/vertex-ai/generative-ai/docs/partner-models/use-claude) documentation.\n"
+        "For more information and list of supported regions, see the [Use Claude](https://cloud.google.com/vertex-ai/generative-ai/docs/partner-models/use-claude) documentation.\n"
       ]
     },
     {
@@ -195,7 +195,7 @@
         "if MODEL == \"claude-sonnet-4@20250514\":\n",
         "    available_regions = [\"us-east5\", \"europe-west4\", \"GLOBAL\"]\n",
         "elif MODEL == \"claude-opus-4@20250514\":\n",
-        "    available_regions = [\"us-east5\", \"europe-west4\"]\n",
+        "    available_regions = [\"us-east5\", \"europe-west4\", \"GLOBAL\"]\n",
         "elif MODEL == \"claude-3-7-sonnet@20250219\":\n",
         "    available_regions = [\"us-east5\", \"europe-west1\", \"europe-west4\", \"GLOBAL\"]\n",
         "elif MODEL == \"claude-3-5-sonnet-v2@20241022\":\n",