diff --git a/docs/en/observability/observability-ai-assistant.asciidoc b/docs/en/observability/observability-ai-assistant.asciidoc
index b8ab278565..6ad174f1ad 100644
--- a/docs/en/observability/observability-ai-assistant.asciidoc
+++ b/docs/en/observability/observability-ai-assistant.asciidoc
@@ -35,6 +35,12 @@ The AI assistant requires the following:
 ** Azure OpenAI Service `gpt-4`(0613) or `gpt-4-32k`(0613) with API version `2023-07-01-preview` or more recent.
 * The knowledge base requires a 4 GB {ml} node.
 
+[IMPORTANT]
+====
+In Elastic Cloud or ECE, if you have Machine Learning autoscaling enabled, Machine Learning nodes will be started when using the Knowledge Base and AI Assistant features.
+Therefore, it will incur into additional costs.
+====
+
 [discrete]
 [[data-information]]
 == Your data and the AI Assistant