diff --git a/agents/customer_explorer_agent.py b/agents/customer_explorer_agent.py
index a1d8adc..f23bbda 100644
--- a/agents/customer_explorer_agent.py
+++ b/agents/customer_explorer_agent.py
@@ -6,6 +6,7 @@
 import dotenv
 from agno.agent import Agent
 from agno.models.openai import OpenAIChat
+from agno.models.nebius import Nebius
 from pydantic import BaseModel
 from datetime import datetime, timedelta
 import json
@@ -116,9 +117,13 @@ def create_customer_explorer_agent() -> Agent:
     """Create and return the customer explorer agent"""
     return Agent(
         name="CustomerExplorerAgent",
-        model=OpenAIChat(
-            id="gpt-4o-mini",
-            api_key=os.getenv("OPENAI_API_KEY"),
+        # model=OpenAIChat(
+        #     id="gpt-4o-mini",
+        #     api_key=os.getenv("OPENAI_API_KEY"),
+        # ),
+        model=Nebius(
+            id="openai/gpt-oss-120b",
+            api_key=os.getenv("NEBIUS_API_KEY"),
         ),
         description=CUSTOMER_EXPLORER_SYSTEM_PROMPT,
         add_history_to_context=False,
diff --git a/agents/next_message_agent.py b/agents/next_message_agent.py
index 90e956d..1fbf194 100644
--- a/agents/next_message_agent.py
+++ b/agents/next_message_agent.py
@@ -6,6 +6,7 @@
 import dotenv
 from agno.agent import Agent
 from agno.models.openai import OpenAIChat
+from agno.models.nebius import Nebius
 from pydantic import BaseModel
 
 dotenv.load_dotenv()
@@ -131,9 +132,13 @@ def create_next_message_agent() -> Agent:
     """Create and return the next message agent"""
     return Agent(
         name="NextMessageAgent",
-        model=OpenAIChat(
-            id="gpt-4o-mini",
-            api_key=os.getenv("OPENAI_API_KEY"),
+        # model=OpenAIChat(
+        #     id="gpt-4o-mini",
+        #     api_key=os.getenv("OPENAI_API_KEY"),
+        # ),
+        model=Nebius(
+            id="openai/gpt-oss-120b",
+            api_key=os.getenv("NEBIUS_API_KEY"),
         ),
         description=NEXT_MESSAGE_SYSTEM_PROMPT,
         add_history_to_context=False,
diff --git a/agents/summary_agent.py b/agents/summary_agent.py
index 272871b..4002b96 100644
--- a/agents/summary_agent.py
+++ b/agents/summary_agent.py
@@ -6,6 +6,7 @@
 import dotenv
 from agno.agent import Agent
 from agno.models.openai import OpenAIChat
+from agno.models.nebius import Nebius
 from pydantic import BaseModel
 
 dotenv.load_dotenv()
@@ -46,9 +47,13 @@ def create_summary_agent() -> Agent:
     """Create and return the summary agent"""
     return Agent(
         name="SummaryAgent",
-        model=OpenAIChat(
-            id="gpt-4o-mini",
-            api_key=os.getenv("OPENAI_API_KEY"),
+        # model=OpenAIChat(
+        #     id="gpt-4o-mini",
+        #     api_key=os.getenv("OPENAI_API_KEY"),
+        # ),
+        model=Nebius(
+            id="openai/gpt-oss-120b",
+            api_key=os.getenv("NEBIUS_API_KEY"),
         ),
         description=SUMMARY_SYSTEM_PROMPT,
         add_history_to_context=False,  # Each call is independent
diff --git a/main_support_agent.py b/main_support_agent.py
index faa8a26..c21ddd4 100644
--- a/main_support_agent.py
+++ b/main_support_agent.py
@@ -10,6 +10,7 @@
 import dotenv
 from agno.agent import Agent
 from agno.models.openai import OpenAIChat
+from agno.models.nebius import Nebius
 
 # Import our specialized agents as tools
 from agents.summary_agent import summarize_conversation
@@ -179,9 +180,13 @@ def escalate_to_human(reason: str, urgency: str = "medium") -> str:
 # Create the main support agent
 support_agent = Agent(
     name="BankCustomerSupportAgent",
-    model=OpenAIChat(
-        id="gpt-4o-mini",
-        api_key=os.getenv("OPENAI_API_KEY"),
+    # model=OpenAIChat(
+    #     id="gpt-4o-mini",
+    #     api_key=os.getenv("OPENAI_API_KEY"),
+    # ),
+    model=Nebius(
+        id="openai/gpt-oss-120b",
+        api_key=os.getenv("NEBIUS_API_KEY"),
     ),
     tools=[
         get_conversation_summary,
diff --git a/tests/test_main_support_agent.py b/tests/test_main_support_agent.py
index 1376f81..d28f4ff 100644
--- a/tests/test_main_support_agent.py
+++ b/tests/test_main_support_agent.py
@@ -17,7 +17,7 @@
 from main_support_agent import support_agent
 
 dotenv.load_dotenv()
-scenario.configure(default_model="openai/gpt-4o-mini")
+scenario.configure(default_model="nebius/openai/gpt-oss-120b")
 
 
 class BankSupportAgentAdapter(scenario.AgentAdapter):