diff --git a/chatmock/reasoning.py b/chatmock/reasoning.py
index ac6fa96..5b04ac2 100644
--- a/chatmock/reasoning.py
+++ b/chatmock/reasoning.py
@@ -12,7 +12,7 @@ def allowed_efforts_for_model(model: str | None) -> Set[str]:
         return DEFAULT_REASONING_EFFORTS
     normalized = base.split(":", 1)[0]
     if normalized.startswith("gpt-5.2"):
-        return {"none", "low", "medium", "high", "xhigh"}
+        return {"low", "medium", "high", "xhigh"}
     if normalized.startswith("gpt-5.1-codex-max"):
         return {"low", "medium", "high", "xhigh"}
     if normalized.startswith("gpt-5.1"):
diff --git a/chatmock/routes_ollama.py b/chatmock/routes_ollama.py
index a2b9bec..76f704a 100644
--- a/chatmock/routes_ollama.py
+++ b/chatmock/routes_ollama.py
@@ -117,7 +117,6 @@ def ollama_tags() -> Response:
                 "gpt-5.2-high",
                 "gpt-5.2-medium",
                 "gpt-5.2-low",
-                "gpt-5.2-none",
                 "gpt-5-codex-high",
                 "gpt-5-codex-medium",
                 "gpt-5-codex-low",
diff --git a/chatmock/routes_openai.py b/chatmock/routes_openai.py
index 1e737b2..75a01b1 100644
--- a/chatmock/routes_openai.py
+++ b/chatmock/routes_openai.py
@@ -534,7 +534,7 @@ def list_models() -> Response:
     model_groups = [
         ("gpt-5", ["high", "medium", "low", "minimal"]),
         ("gpt-5.1", ["high", "medium", "low"]),
-        ("gpt-5.2", ["xhigh", "high", "medium", "low", "none"]),
+        ("gpt-5.2", ["xhigh", "high", "medium", "low"]),
         ("gpt-5-codex", ["high", "medium", "low"]),
         ("gpt-5.1-codex", ["high", "medium", "low"]),
         ("gpt-5.1-codex-max", ["xhigh", "high", "medium", "low"]),