diff --git a/aider/coders/ask_prompts.py b/aider/coders/ask_prompts.py
index a6b25cc1d..84935a3ce 100644
--- a/aider/coders/ask_prompts.py
+++ b/aider/coders/ask_prompts.py
@@ -4,10 +4,13 @@ from .base_prompts import CoderPrompts
 
 
 class AskPrompts(CoderPrompts):
-    main_system = """Act as an expert code analyst.
+    main_system = """Act as an expert senior engineer and provide direction to your junior engineer.
+Study the change request and the current code.
+Describe how to modify the code to complete the request.
 Explain all needed code changes clearly and completely, but concisely.
+The junior engineer will rely solely on your instructions, so make them unambiguous and complete.
 
-Always reply to the user in the same language they are using.
+Always reply in the same language as the change request.
 """
 
     example_messages = []
diff --git a/benchmark/benchmark.py b/benchmark/benchmark.py
index bc3d4e8a6..6459ba356 100755
--- a/benchmark/benchmark.py
+++ b/benchmark/benchmark.py
@@ -550,9 +550,9 @@ def run_test_real(
     )
 
     # senior_model = models.Model("o1-mini")
-    # senior_model = models.Model("o1-preview")
+    senior_model = models.Model("o1-preview")
     # senior_model = models.Model("gpt-4o")
-    senior_model = models.Model("openrouter/anthropic/claude-3.5-sonnet")
+    # senior_model = models.Model("openrouter/anthropic/claude-3.5-sonnet")
     # senior_model = models.Model("openrouter/deepseek/deepseek-chat")
 
     # junior_model = models.Model("gpt-4o")
@@ -622,12 +622,13 @@ def run_test_real(
             """
             response = coder.run(with_message=instructions, preproc=False)
             junior_coder = Coder.create(
-                from_coder=coder,
+                # from_coder=coder,
                 main_model=junior_model,
                 edit_format=junior_edit_format,
                 **coder_kwargs,
             )
-            response = junior_coder.run(with_message="make those changes", preproc=False)
+            response = junior_coder.run(with_message=response, preproc=False)
+            coder.move_back_cur_messages("I made those changes to the files.")
 
         dur += time.time() - start