Add "Switch to Agent Builder" doc for AI assistants

explore-analyze/ai-features/ai-chat-experiences/ai-agent-or-ai-assistant.md

@@ -0,0 +1,49 @@
+---
+applies_to:
+  stack: preview 9.3
+  serverless: preview
+products:
+  - id: kibana
+  - id: observability
+  - id: security
+  - id: cloud-serverless
+---
+
+# Compare AI Agent and AI Assistant
+
+AI Agent is a technical preview chat experience designed to replace Elastic Assistant for {{observability}} & Search and Elastic Assistant for Security. 
+
+AI Agent uses Elastic's [Agent Builder](/solutions/search/elastic-agent-builder.md) platform. It lets you design your own purpose-built agents and enables a more cohesive AI chat experience across all Elastic's products. You can create specific agents for use in different workflows, and give them precise access to the tools and data they need. 
+
+## Enable AI Agent
+
+While AI Agent is in technical preview, you may have to opt in to enable it. This behavior varies by solution:
+
+- **{{observability}} and {{elastic-sec}}:** Each solution's classic AI Assistant remains the default chat experience. 
+- **{{es}}:** AI Agent is the default chat experience.
+
+To enable AI Agent, use the [global search field](/explore-analyze/find-and-organize/find-apps-and-objects.md) to find [**GenAI Settings**](/explore-analyze/ai-features/manage-access-to-ai-assistant.md). 
+
+## Feature differences between AI Agent and AI Assistant
+
+Some functionality supported by Elastic's AI Assistants is not supported by AI Agents. The differences vary by solution.
+
+### AI Agent features in {{elastic-sec}}
+
+AI Agent for {{elastic-sec}} provides a similar experience to AI Assistant for Security at a high level, but with a number of differences.
+
+The following AI Assistant for Security features are not supported in AI Agent:
+
+- **Knowledge Base** 
+- **Data anonymization**
+- **Time awareness**
+- **Chat sharing**
+- **Citations**
+- **Audit logging**
+- **Quick prompts**
+
+Also, AI Agent chats do not show previews of data you attach to a message, such as Alerts and Attacks.
+
+### AI Agent features in Elastic {{observability}}
+
+### AI Agent features in {{es}}

explore-analyze/ai-features/manage-access-to-ai-assistant.md

@@ -40,6 +40,7 @@ The **GenAI Settings** page has the following settings:
   - If **Elastic Managed LLM** or a custom LLM connector is selected, AI-powered features will default to that connector regardless of which connector was used most recently in your environment. 
 - **Disallow all other connectors**: When this setting is disabled, whenever you use an AI-powered feature you can select which connector should power it. Enable it to prevent connectors other than the default connector from being used in your space. Default setting: disabled.
 - **AI feature visibility**: This button opens the current Space's settings page, where you can specify which features are enabled in your environment, including AI-powered features. 
+- **Chat experience**: {applies_to}`stack: preview 9.3` Select whether to use AI Assistant or AI Agent. For information about choosing one, refer to [Compare AI Agent and AI Assistant](/explore-analyze/ai-features/ai-chat-experiences/ai-agent-or-ai-assistant.md).
 - **AI Assistant visibility**: This setting allows you to choose which AI Assistants are available to use and where. There are several options:
   - **Only in their solutions** (default): The Security AI Assistant appears in {{elastic-sec}}, and the {{obs-ai-assistant}} appears in {{es}} and {{observability}}.
   - **{{obs-ai-assistant}} in other apps**: The {{obs-ai-assistant}} appears throughout {{kib}} regardless of solution. The Security AI Assistant does not appear anywhere.
@@ -55,6 +56,7 @@ The **GenAI Settings** page has the following settings:
 The **GenAI Settings** page has the following settings:
 
 - **Default AI Connector**: Click **Manage connectors** to open the **Connectors** page, where you can create or delete AI connectors. To update these settings, you need the `Actions and connectors: all` [{{kib}} privilege](/deploy-manage/users-roles/cluster-or-deployment-auth/kibana-privileges.md).
+- **Chat experience**: {applies_to}`serverless: preview` Select whether to use AI Assistant or AI Agent. For information about choosing one, refer to [Compare AI Agent and AI Assistant](/explore-analyze/ai-features/ai-chat-experiences/ai-agent-or-ai-assistant.md).
 - **AI feature visibility**: Click **Go to Permissions tab** to access the active {{kib}} space's settings page, where you can specify which features each [user role](/deploy-manage/users-roles/cluster-or-deployment-auth/kibana-privileges.md) has access to in your environment. This includes AI-powered features. 
 
 :::

explore-analyze/toc.yml

@@ -183,7 +183,7 @@ toc:
               - file: ai-features/llm-guides/connect-to-lmstudio-observability.md
               - file: ai-features/llm-guides/connect-to-lmstudio-security.md
               - file: ai-features/llm-guides/connect-to-vLLM.md
-      - hidden: ai-features/ai-agent-or-ai-assistant.md
+      - file: ai-features/ai-chat-experiences/ai-agent-or-ai-assistant.md
   - file: discover.md
     children:
       - file: discover/discover-get-started.md

redirects.yml

@@ -631,3 +631,6 @@ redirects:
   # Move CCS feature docs to explore-analyze
   'solutions/search/cross-cluster-search.md': 'explore-analyze/cross-cluster-search.md'
   'solutions/search/cross-cluster-search/using-resolve-cluster-endpoint-before-cross-cluster-search.md': 'explore-analyze/cross-cluster-search/using-resolve-cluster-endpoint-before-cross-cluster-search.md'
+
+  # Related to https://github.com/elastic/docs-content/pull/4438
+  'explore-analyze/ai-features/ai-agent-or-ai-assistant.md': 'explore-analyze/ai-features/ai-chat-experiences/ai-agent-or-ai-assistant.md'