diff --git a/src/ragas/llms/base.py b/src/ragas/llms/base.py
index d846b9ab3..c41747da0 100644
--- a/src/ragas/llms/base.py
+++ b/src/ragas/llms/base.py
@@ -289,7 +289,7 @@ async def agenerate_text(
 
 
 def llm_factory(
-    model: str = "gpt-3.5-turbo", run_config: t.Optional[RunConfig] = None
+    model: str = "gpt-4o-mini", run_config: t.Optional[RunConfig] = None
 ) -> BaseRagasLLM:
     timeout = None
     if run_config is not None:
diff --git a/src/ragas/testset/generator.py b/src/ragas/testset/generator.py
index 4fc52186c..89e8e656f 100644
--- a/src/ragas/testset/generator.py
+++ b/src/ragas/testset/generator.py
@@ -146,8 +146,8 @@ def from_llama_index(
     @deprecated("0.1.4", removal="0.2.0", alternative="from_langchain")
     def with_openai(
         cls,
-        generator_llm: str = "gpt-3.5-turbo-16k",
-        critic_llm: str = "gpt-4",
+        generator_llm: str = "gpt-4o-mini",
+        critic_llm: str = "gpt-4o",
         embeddings: str = "text-embedding-ada-002",
         docstore: t.Optional[DocumentStore] = None,
         chunk_size: int = 1024,