diff --git a/backend/src/agent/graph.py b/backend/src/agent/graph.py
index 0f19c3f2..33f3f8c7 100644
--- a/backend/src/agent/graph.py
+++ b/backend/src/agent/graph.py
@@ -44,7 +44,7 @@
 def generate_query(state: OverallState, config: RunnableConfig) -> QueryGenerationState:
     """LangGraph node that generates search queries based on the User's question.
 
-    Uses Gemini 2.0 Flash to create an optimized search queries for web research based on
+    Uses Gemini 2.5 Flash to create an optimized search queries for web research based on
     the User's question.
 
     Args:
@@ -60,7 +60,7 @@ def generate_query(state: OverallState, config: RunnableConfig) -> QueryGenerati
     if state.get("initial_search_query_count") is None:
         state["initial_search_query_count"] = configurable.number_of_initial_queries
 
-    # init Gemini 2.0 Flash
+    # init Gemini 2.5 Flash
     llm = ChatGoogleGenerativeAI(
         model=configurable.query_generator_model,
         temperature=1.0,
@@ -95,7 +95,7 @@ def continue_to_web_research(state: QueryGenerationState):
 def web_research(state: WebSearchState, config: RunnableConfig) -> OverallState:
     """LangGraph node that performs web research using the native Google Search API tool.
 
-    Executes a web search using the native Google Search API tool in combination with Gemini 2.0 Flash.
+    Executes a web search using the native Google Search API tool in combination with Gemini 2.5 Flash.
 
     Args:
         state: Current graph state containing the search query and research loop count