diff --git a/src/agentlab/llm/tracking.py b/src/agentlab/llm/tracking.py
index 8e3d812a..6a08839b 100644
--- a/src/agentlab/llm/tracking.py
+++ b/src/agentlab/llm/tracking.py
@@ -1,7 +1,7 @@
-from functools import cache
 import os
 import threading
 from contextlib import contextmanager
+from functools import cache
 
 import requests
 from langchain_community.callbacks.openai_info import MODEL_COST_PER_1K_TOKENS
@@ -10,10 +10,13 @@
 
 
 class LLMTracker:
-    def __init__(self):
+    def __init__(self, suffix=""):
         self.input_tokens = 0
         self.output_tokens = 0
         self.cost = 0.0
+        self.input_tokens_key = "input_tokens_" + suffix if suffix else "input_tokens"
+        self.output_tokens_key = "output_tokens_" + suffix if suffix else "output_tokens"
+        self.cost_key = "cost_" + suffix if suffix else "cost"
 
     def __call__(self, input_tokens: int, output_tokens: int, cost: float):
         self.input_tokens += input_tokens
@@ -23,9 +26,9 @@ def __call__(self, input_tokens: int, output_tokens: int, cost: float):
     @property
     def stats(self):
         return {
-            "input_tokens": self.input_tokens,
-            "output_tokens": self.output_tokens,
-            "cost": self.cost,
+            self.input_tokens_key: self.input_tokens,
+            self.output_tokens_key: self.output_tokens,
+            self.cost_key: self.cost,
         }
 
     def add_tracker(self, tracker: "LLMTracker"):
@@ -36,12 +39,12 @@ def __repr__(self):
 
 
 @contextmanager
-def set_tracker():
+def set_tracker(suffix=""):
     global TRACKER
     if not hasattr(TRACKER, "instance"):
         TRACKER.instance = None
     previous_tracker = TRACKER.instance  # type: LLMTracker
-    TRACKER.instance = LLMTracker()
+    TRACKER.instance = LLMTracker(suffix)
     try:
         yield TRACKER.instance
     finally:
@@ -52,9 +55,9 @@ def set_tracker():
         TRACKER.instance = previous_tracker
 
 
-def cost_tracker_decorator(get_action):
+def cost_tracker_decorator(get_action, suffix=""):
     def wrapper(self, obs):
-        with set_tracker() as tracker:
+        with set_tracker(suffix) as tracker:
             action, agent_info = get_action(self, obs)
         agent_info.get("stats").update(tracker.stats)
         return action, agent_info