diff --git a/async-openai/src/types/chat.rs b/async-openai/src/types/chat.rs
index 68c93e19..a7776b48 100644
--- a/async-openai/src/types/chat.rs
+++ b/async-openai/src/types/chat.rs
@@ -620,6 +620,7 @@ pub enum ServiceTierResponse {
 #[derive(Clone, Serialize, Debug, Deserialize, PartialEq)]
 #[serde(rename_all = "lowercase")]
 pub enum ReasoningEffort {
+    Minimal,
     Low,
     Medium,
     High,