feat: Anthropic Sonnet-4-6 launch (#4442)

Signed-off-by: Sam-Deciga <decigagarcia@google.com>

Author: Sam-Deciga

notebooks/official/generative_ai/anthropic_claude_intro.ipynb

@@ -72,6 +72,9 @@
         "\n",
         "### Available Anthropic Claude models\n",
         "\n",
+        "#### Claude Sonnet 4.6\n",
+        "Claude Sonnet 4.6 delivers frontier intelligence at scale—built for coding, agents, and enterprise workflows.\n",
+        "\n",
         "#### Claude Opus 4.6\n",
         "Claude Opus 4.6 is the next generation of Anthropic’s most intelligent model, and the world’s best model for coding, enterprise agents, and professional work.\n",
         "\n",
@@ -203,8 +206,15 @@
       },
       "outputs": [],
       "source": [
-        "MODEL = \"claude-opus-4-6\"  # @param [\"claude-opus-4-6\",\"claude-opus-4-5\",\"claude-haiku-4-5\",\"claude-sonnet-4-5\",\"claude-opus-4-1\",\"claude-sonnet-4\",\"claude-opus-4\",\"claude-3-7-sonnet\",\"claude-3-5-sonnet-v2\",\"claude-3-5-haiku\",\"claude-3-5-sonnet\",\"claude-3-opus\",\"claude-3-haiku\"]\n",
-        "if MODEL == \"claude-opus-4-6\":\n",
+        "MODEL = \"claude-sonnet-4-6\"  # @param [\"claude-sonnet-4-6\",\"claude-opus-4-6\",\"claude-opus-4-5\",\"claude-haiku-4-5\",\"claude-sonnet-4-5\",\"claude-opus-4-1\",\"claude-sonnet-4\",\"claude-opus-4\",\"claude-3-7-sonnet\",\"claude-3-5-sonnet-v2\",\"claude-3-5-haiku\",\"claude-3-5-sonnet\",\"claude-3-opus\",\"claude-3-haiku\"]\n",
+        "if MODEL == \"claude-sonnet-4-6\":\n",
+        "    available_regions = [\n",
+        "        \"us-east5\",\n",
+        "        \"europe-west1\",\n",
+        "        \"asia-southeast1\",\n",
+        "        \"global\",\n",
+        "    ]\n",
+        "elif MODEL == \"claude-opus-4-6\":\n",
         "    available_regions = [\n",
         "        \"us-east5\",\n",
         "        \"us-west4\",\n",
@@ -657,8 +667,15 @@
       },
       "outputs": [],
       "source": [
-        "MODEL = \"claude-opus-4-6\"  # @param [\"claude-opus-4-6\",\"claude-opus-4-5\",\"claude-haiku-4-5\",\"claude-sonnet-4-5\",\"claude-opus-4-1\",\"claude-sonnet-4\",\"claude-opus-4\",\"claude-3-7-sonnet\",\"claude-3-5-sonnet-v2\",\"claude-3-5-haiku\",\"claude-3-5-sonnet\",\"claude-3-opus\",\"claude-3-haiku\"]\n",
-        "if MODEL == \"claude-opus-4-6\":\n",
+        "MODEL = \"claude-sonnet-4-6\"  # @param [\"claude-sonnet-4-6\",\"claude-opus-4-6\",\"claude-opus-4-5\",\"claude-haiku-4-5\",\"claude-sonnet-4-5\",\"claude-opus-4-1\",\"claude-sonnet-4\",\"claude-opus-4\",\"claude-3-7-sonnet\",\"claude-3-5-sonnet-v2\",\"claude-3-5-haiku\",\"claude-3-5-sonnet\",\"claude-3-opus\",\"claude-3-haiku\"]\n",
+        "if MODEL == \"claude-sonnet-4-6\":\n",
+        "    available_regions = [\n",
+        "        \"us-east5\",\n",
+        "        \"europe-west1\",\n",
+        "        \"asia-southeast1\",\n",
+        "        \"global\",\n",
+        "    ]\n",
+        "elif MODEL == \"claude-opus-4-6\":\n",
         "    available_regions = [\n",
         "        \"us-east5\",\n",
         "        \"us-west4\",\n",