diff --git a/homeassistant/components/intent/__init__.py b/homeassistant/components/intent/__init__.py
index 1ffb8747d91..7c24fe649b1 100644
--- a/homeassistant/components/intent/__init__.py
+++ b/homeassistant/components/intent/__init__.py
@@ -364,7 +364,7 @@ class NevermindIntentHandler(intent.IntentHandler):
     """Takes no action."""
 
     intent_type = intent.INTENT_NEVERMIND
-    description = "Cancels the current request and does nothing"
+    description = "Cancel the current conversation if it was started by mistake or the user wants it to stop."
 
     async def async_handle(self, intent_obj: intent.Intent) -> intent.IntentResponse:
         """Do nothing and produces an empty response."""
diff --git a/homeassistant/components/openai_conversation/conversation.py b/homeassistant/components/openai_conversation/conversation.py
index 9c73766c8d4..95d356b26e2 100644
--- a/homeassistant/components/openai_conversation/conversation.py
+++ b/homeassistant/components/openai_conversation/conversation.py
@@ -30,6 +30,7 @@ from homeassistant.exceptions import HomeAssistantError, TemplateError
 from homeassistant.helpers import device_registry as dr, intent, llm, template
 from homeassistant.helpers.entity_platform import AddEntitiesCallback
 from homeassistant.util import ulid
+from homeassistant.util.json import JsonObjectType
 
 from . import OpenAIConfigEntry
 from .const import (
@@ -292,6 +293,8 @@ class OpenAIConversationEntity(
             if not tool_calls or not llm_api:
                 break
 
+            aborting = False
+
             for tool_call in tool_calls:
                 tool_input = llm.ToolInput(
                     tool_name=tool_call.function.name,
@@ -301,12 +304,25 @@ class OpenAIConversationEntity(
                     "Tool call: %s(%s)", tool_input.tool_name, tool_input.tool_args
                 )
 
-                try:
-                    tool_response = await llm_api.async_call_tool(tool_input)
-                except (HomeAssistantError, vol.Invalid) as e:
-                    tool_response = {"error": type(e).__name__}
-                    if str(e):
-                        tool_response["error_text"] = str(e)
+                # OpenAI requires a tool response for every tool call in history
+                if aborting:
+                    tool_response: JsonObjectType = {
+                        "error": "Aborted",
+                        "error_text": "Abort conversation requested",
+                    }
+                if not aborting:
+                    try:
+                        tool_response = await llm_api.async_call_tool(tool_input)
+                    except llm.AbortConversation as e:
+                        aborting = True
+                        tool_response = {
+                            "error": "Aborted",
+                            "error_text": str(e) or "Abort conversation requested",
+                        }
+                    except (HomeAssistantError, vol.Invalid) as e:
+                        tool_response = {"error": type(e).__name__}
+                        if str(e):
+                            tool_response["error_text"] = str(e)
 
                 LOGGER.debug("Tool response: %s", tool_response)
                 messages.append(
@@ -317,6 +333,9 @@ class OpenAIConversationEntity(
                     )
                 )
 
+            if aborting:
+                break
+
         self.history[conversation_id] = messages
 
         intent_response = intent.IntentResponse(language=user_input.language)
diff --git a/homeassistant/helpers/llm.py b/homeassistant/helpers/llm.py
index 38d80d5649d..0dba73374ee 100644
--- a/homeassistant/helpers/llm.py
+++ b/homeassistant/helpers/llm.py
@@ -113,6 +113,10 @@ def async_get_apis(hass: HomeAssistant) -> list[API]:
     return list(_async_get_apis(hass).values())
 
 
+class AbortConversation(HomeAssistantError):
+    """Abort the conversation."""
+
+
 @dataclass(slots=True)
 class LLMContext:
     """Tool input to be processed."""
@@ -169,6 +173,9 @@ class APIInstance:
             {"tool_name": tool_input.tool_name, "tool_args": tool_input.tool_args},
         )
 
+        if tool_input.tool_name == intent.INTENT_NEVERMIND:
+            raise AbortConversation("Nevermind intent called")
+
         for tool in self.tools:
             if tool.name == tool_input.tool_name:
                 break
@@ -273,7 +280,6 @@ class AssistAPI(API):
         INTENT_OPEN_COVER,  # deprecated
         INTENT_CLOSE_COVER,  # deprecated
         intent.INTENT_GET_STATE,
-        intent.INTENT_NEVERMIND,
         intent.INTENT_TOGGLE,
         intent.INTENT_GET_CURRENT_DATE,
         intent.INTENT_GET_CURRENT_TIME,