diff --git a/letta/schemas/llm_config.py b/letta/schemas/llm_config.py
index 4756bda0..20cf676e 100644
--- a/letta/schemas/llm_config.py
+++ b/letta/schemas/llm_config.py
@@ -74,6 +74,7 @@ class LLMConfig(BaseModel):
         "medium",
         description="Soft control for how verbose model output should be, used for GPT-5 models.",
     )
+    tier: Optional[str] = Field(None, description="The cost tier for the model (cloud only).")
 
     # FIXME hack to silence pydantic protected namespace warning
     model_config = ConfigDict(protected_namespaces=())