diff --git a/libs/partners/openai/langchain_openai/llms/base.py b/libs/partners/openai/langchain_openai/llms/base.py
index 1f66c1c2f82..e1d0938f018 100644
--- a/libs/partners/openai/langchain_openai/llms/base.py
+++ b/libs/partners/openai/langchain_openai/llms/base.py
@@ -537,6 +537,7 @@ class BaseOpenAI(BaseLLM):
                 max_tokens = openai.modelname_to_contextsize("gpt-3.5-turbo-instruct")
         """
         model_token_mapping = {
+            "gpt-4o-mini": 128_000,
             "gpt-4o": 128_000,
             "gpt-4o-2024-05-13": 128_000,
             "gpt-4": 8192,