diff --git a/scrapegraphai/graphs/abstract_graph.py b/scrapegraphai/graphs/abstract_graph.py
index 01ff0b0a..ae1e90b2 100644
--- a/scrapegraphai/graphs/abstract_graph.py
+++ b/scrapegraphai/graphs/abstract_graph.py
@@ -147,7 +147,7 @@ class AbstractGraph(ABC):
                 warnings.simplefilter("ignore")
                 return init_chat_model(**llm_params)
 
-        known_models = ["gpt","openai", "azure_openai", "google_genai", "ollama", "oneapi", "nvidia", "groq", "google_vertexai", "bedrock", "mistralai", "hugging_face", "deepseek", "ernie", "fireworks"]
+        known_models = ["chatgpt","gpt","openai", "azure_openai", "google_genai", "ollama", "oneapi", "nvidia", "groq", "google_vertexai", "bedrock", "mistralai", "hugging_face", "deepseek", "ernie", "fireworks"]
 
         if llm_params["model"].split("/")[0] not in known_models and llm_params["model"].split("-")[0] not in known_models:
             raise ValueError(f"Model '{llm_params['model']}' is not supported")