diff --git a/docs/core_docs/docs/integrations/chat/anthropic.ipynb b/docs/core_docs/docs/integrations/chat/anthropic.ipynb
index 4786d1f68a9b..9fafc787406e 100644
--- a/docs/core_docs/docs/integrations/chat/anthropic.ipynb
+++ b/docs/core_docs/docs/integrations/chat/anthropic.ipynb
@@ -953,7 +953,7 @@
     "const customClient = new AnthropicVertex();\n",
     "\n",
     "const modelWithCustomClient = new ChatAnthropic({\n",
-    "  modelName: \"claude-3-sonnet-20240229\",\n",
+    "  modelName: \"claude-3-sonnet@20240229\",\n",
     "  maxRetries: 0,\n",
     "  createClient: () => customClient,\n",
     "});\n",