Add support for gpt-5.1 (home-assistant#156612)

Author: Shulyaka

homeassistant/components/openai_conversation/config_flow.py

@@ -338,16 +338,21 @@ async def async_step_model(
             options.pop(CONF_CODE_INTERPRETER)
 
         if model.startswith(("o", "gpt-5")) and not model.startswith("gpt-5-pro"):
+            if model.startswith("gpt-5.1"):
+                reasoning_options = ["none", "low", "medium", "high"]
+            elif model.startswith("gpt-5"):
+                reasoning_options = ["minimal", "low", "medium", "high"]
+            else:
+                reasoning_options = ["low", "medium", "high"]
+
             step_schema.update(
                 {
                     vol.Optional(
                         CONF_REASONING_EFFORT,
                         default=RECOMMENDED_REASONING_EFFORT,
                     ): SelectSelector(
                         SelectSelectorConfig(
-                            options=["low", "medium", "high"]
-                            if model.startswith("o")
-                            else ["minimal", "low", "medium", "high"],
+                            options=reasoning_options,
                             translation_key=CONF_REASONING_EFFORT,
                             mode=SelectSelectorMode.DROPDOWN,
                         )

homeassistant/components/openai_conversation/entity.py

@@ -510,6 +510,9 @@ async def _async_handle_chat_log(
                 "verbosity": options.get(CONF_VERBOSITY, RECOMMENDED_VERBOSITY)
             }
 
+        if model_args["model"].startswith("gpt-5.1"):
+            model_args["prompt_cache_retention"] = "24h"
+
         tools: list[ToolParam] = []
         if chat_log.llm_api:
             tools = [

homeassistant/components/openai_conversation/strings.json

@@ -146,7 +146,8 @@
         "high": "[%key:common::state::high%]",
         "low": "[%key:common::state::low%]",
         "medium": "[%key:common::state::medium%]",
-        "minimal": "Minimal"
+        "minimal": "Minimal",
+        "none": "None"
       }
     },
     "search_context_size": {

tests/components/openai_conversation/test_config_flow.py

@@ -235,6 +235,56 @@ async def test_subentry_unsupported_model(
     assert subentry_flow["errors"] == {"chat_model": "model_not_supported"}
 
 
+@pytest.mark.parametrize(
+    ("model", "reasoning_effort_options"),
+    [
+        ("o4-mini", ["low", "medium", "high"]),
+        ("gpt-5", ["minimal", "low", "medium", "high"]),
+        ("gpt-5.1", ["none", "low", "medium", "high"]),
+    ],
+)
+async def test_subentry_reasoning_effort_list(
+    hass: HomeAssistant,
+    mock_config_entry,
+    mock_init_component,
+    model,
+    reasoning_effort_options,
+) -> None:
+    """Test the list reasoning effort options."""
+    subentry = next(iter(mock_config_entry.subentries.values()))
+    subentry_flow = await mock_config_entry.start_subentry_reconfigure_flow(
+        hass, subentry.subentry_id
+    )
+    assert subentry_flow["type"] is FlowResultType.FORM
+    assert subentry_flow["step_id"] == "init"
+
+    # Configure initial step
+    subentry_flow = await hass.config_entries.subentries.async_configure(
+        subentry_flow["flow_id"],
+        {
+            CONF_RECOMMENDED: False,
+            CONF_PROMPT: "Speak like a pirate",
+            CONF_LLM_HASS_API: ["assist"],
+        },
+    )
+    assert subentry_flow["type"] is FlowResultType.FORM
+    assert subentry_flow["step_id"] == "advanced"
+
+    # Configure advanced step
+    subentry_flow = await hass.config_entries.subentries.async_configure(
+        subentry_flow["flow_id"],
+        {
+            CONF_CHAT_MODEL: model,
+        },
+    )
+    assert subentry_flow["type"] is FlowResultType.FORM
+    assert subentry_flow["step_id"] == "model"
+    assert (
+        subentry_flow["data_schema"].schema[CONF_REASONING_EFFORT].config["options"]
+        == reasoning_effort_options
+    )
+
+
 async def test_subentry_websearch_unsupported_reasoning_effort(
     hass: HomeAssistant, mock_config_entry, mock_init_component
 ) -> None: