diff --git a/crates/language_models/src/provider/open_ai.rs b/crates/language_models/src/provider/open_ai.rs
index 2e0c3cffab11ce0b51d606502640696291037677..c07bf7038c8d795e828c35e69d044f8e3107ec6a 100644
--- a/crates/language_models/src/provider/open_ai.rs
+++ b/crates/language_models/src/provider/open_ai.rs
@@ -362,7 +362,10 @@ pub fn count_open_ai_tokens(
                 .collect::<Vec<_>>();
 
             match model {
-                open_ai::Model::Custom { .. } | open_ai::Model::O1Mini | open_ai::Model::O1 => {
+                open_ai::Model::Custom { .. }
+                | open_ai::Model::O1Mini
+                | open_ai::Model::O1
+                | open_ai::Model::O3Mini => {
                     tiktoken_rs::num_tokens_from_messages("gpt-4", &messages)
                 }
                 _ => tiktoken_rs::num_tokens_from_messages(model.id(), &messages),