diff --git a/homeassistant/components/google_generative_ai_conversation/config_flow.py b/homeassistant/components/google_generative_ai_conversation/config_flow.py
index ee980c9bf48..ec476d940d1 100644
--- a/homeassistant/components/google_generative_ai_conversation/config_flow.py
+++ b/homeassistant/components/google_generative_ai_conversation/config_flow.py
@@ -183,10 +183,10 @@ class GoogleGenerativeAIOptionsFlow(OptionsFlow):
 
         if user_input is not None:
             if user_input[CONF_RECOMMENDED] == self.last_rendered_recommended:
-                if user_input[CONF_LLM_HASS_API] == "none":
-                    user_input.pop(CONF_LLM_HASS_API)
+                if not user_input.get(CONF_LLM_HASS_API):
+                    user_input.pop(CONF_LLM_HASS_API, None)
                 if not (
-                    user_input.get(CONF_LLM_HASS_API, "none") != "none"
+                    user_input.get(CONF_LLM_HASS_API)
                     and user_input.get(CONF_USE_GOOGLE_SEARCH_TOOL, False) is True
                 ):
                     # Don't allow to save options that enable the Google Seearch tool with an Assist API
@@ -213,18 +213,16 @@ async def google_generative_ai_config_option_schema(
 ) -> dict:
     """Return a schema for Google Generative AI completion options."""
     hass_apis: list[SelectOptionDict] = [
-        SelectOptionDict(
-            label="No control",
-            value="none",
-        )
-    ]
-    hass_apis.extend(
         SelectOptionDict(
             label=api.name,
             value=api.id,
         )
         for api in llm.async_get_apis(hass)
-    )
+    ]
+    if (suggested_llm_apis := options.get(CONF_LLM_HASS_API)) and isinstance(
+        suggested_llm_apis, str
+    ):
+        suggested_llm_apis = [suggested_llm_apis]
 
     schema = {
         vol.Optional(
@@ -237,9 +235,8 @@ async def google_generative_ai_config_option_schema(
         ): TemplateSelector(),
         vol.Optional(
             CONF_LLM_HASS_API,
-            description={"suggested_value": options.get(CONF_LLM_HASS_API)},
-            default="none",
-        ): SelectSelector(SelectSelectorConfig(options=hass_apis)),
+            description={"suggested_value": suggested_llm_apis},
+        ): SelectSelector(SelectSelectorConfig(options=hass_apis, multiple=True)),
         vol.Required(
             CONF_RECOMMENDED, default=options.get(CONF_RECOMMENDED, False)
         ): bool,
diff --git a/tests/components/google_generative_ai_conversation/test_config_flow.py b/tests/components/google_generative_ai_conversation/test_config_flow.py
index 8fda02b335d..13063580c95 100644
--- a/tests/components/google_generative_ai_conversation/test_config_flow.py
+++ b/tests/components/google_generative_ai_conversation/test_config_flow.py
@@ -125,7 +125,6 @@ def will_options_be_rendered_again(current_options, new_options) -> bool:
         (
             {
                 CONF_RECOMMENDED: True,
-                CONF_LLM_HASS_API: "none",
                 CONF_PROMPT: "bla",
             },
             {
@@ -162,12 +161,12 @@ def will_options_be_rendered_again(current_options, new_options) -> bool:
             },
             {
                 CONF_RECOMMENDED: True,
-                CONF_LLM_HASS_API: "assist",
+                CONF_LLM_HASS_API: ["assist"],
                 CONF_PROMPT: "",
             },
             {
                 CONF_RECOMMENDED: True,
-                CONF_LLM_HASS_API: "assist",
+                CONF_LLM_HASS_API: ["assist"],
                 CONF_PROMPT: "",
             },
             None,
@@ -235,7 +234,7 @@ def will_options_be_rendered_again(current_options, new_options) -> bool:
             {
                 CONF_RECOMMENDED: False,
                 CONF_PROMPT: "Speak like a pirate",
-                CONF_LLM_HASS_API: "assist",
+                CONF_LLM_HASS_API: ["assist"],
                 CONF_TEMPERATURE: 0.3,
                 CONF_CHAT_MODEL: RECOMMENDED_CHAT_MODEL,
                 CONF_TOP_P: RECOMMENDED_TOP_P,
@@ -263,6 +262,24 @@ def will_options_be_rendered_again(current_options, new_options) -> bool:
             },
             {CONF_USE_GOOGLE_SEARCH_TOOL: "invalid_google_search_option"},
         ),
+        (
+            {
+                CONF_RECOMMENDED: True,
+                CONF_PROMPT: "",
+                CONF_LLM_HASS_API: "assist",
+            },
+            {
+                CONF_RECOMMENDED: True,
+                CONF_PROMPT: "",
+                CONF_LLM_HASS_API: ["assist"],
+            },
+            {
+                CONF_RECOMMENDED: True,
+                CONF_PROMPT: "",
+                CONF_LLM_HASS_API: ["assist"],
+            },
+            None,
+        ),
     ],
 )
 @pytest.mark.usefixtures("mock_init_component")