diff --git a/frigate/genai/__init__.py b/frigate/genai/__init__.py
index e26b50757..3bc98100c 100644
--- a/frigate/genai/__init__.py
+++ b/frigate/genai/__init__.py
@@ -153,9 +153,6 @@ Each line represents a detection state, not necessarily unique individuals. The
             if "other_concerns" in schema.get("required", []):
                 schema["required"].remove("other_concerns")
 
-        # OpenAI strict mode requires additionalProperties: false on all objects
-        schema["additionalProperties"] = False
-
         response_format = {
             "type": "json_schema",
             "json_schema": {
diff --git a/frigate/genai/openai.py b/frigate/genai/openai.py
index af94859de..432641332 100644
--- a/frigate/genai/openai.py
+++ b/frigate/genai/openai.py
@@ -73,8 +73,17 @@ class OpenAIClient(GenAIClient):
                 **self.genai_config.runtime_options,
             }
             if response_format:
+                # OpenAI strict mode requires additionalProperties: false on the schema
+                if response_format.get("type") == "json_schema" and response_format.get(
+                    "json_schema", {}
+                ).get("strict"):
+                    schema = response_format.get("json_schema", {}).get("schema")
+                    if isinstance(schema, dict):
+                        schema["additionalProperties"] = False
                 request_params["response_format"] = response_format
+
             result = self.provider.chat.completions.create(**request_params)
+
             if (
                 result is not None
                 and hasattr(result, "choices")