diff --git a/aider/models.py b/aider/models.py
index 4537b81c5..40f71854f 100644
--- a/aider/models.py
+++ b/aider/models.py
@@ -120,7 +120,6 @@ MODEL_SETTINGS = [
         "udiff",
         weak_model_name="gpt-4o-mini",
         use_repo_map=True,
-        send_undo_reply=True,
         accepts_images=True,
         lazy=True,
         reminder="sys",
@@ -130,7 +129,6 @@ MODEL_SETTINGS = [
         "udiff",
         weak_model_name="gpt-4o-mini",
         use_repo_map=True,
-        send_undo_reply=True,
         accepts_images=True,
         lazy=True,
         reminder="sys",
@@ -140,7 +138,6 @@ MODEL_SETTINGS = [
         "diff",
         weak_model_name="gpt-4o-mini",
         use_repo_map=True,
-        send_undo_reply=True,
         accepts_images=True,
         lazy=True,
         reminder="sys",
@@ -150,7 +147,6 @@ MODEL_SETTINGS = [
         "diff",
         weak_model_name="gpt-4o-mini",
         use_repo_map=True,
-        send_undo_reply=True,
         accepts_images=True,
         lazy=True,
         reminder="sys",
@@ -160,7 +156,6 @@ MODEL_SETTINGS = [
         "diff",
         weak_model_name="gpt-4o-mini",
         use_repo_map=True,
-        send_undo_reply=True,
         accepts_images=True,
         lazy=True,
         reminder="sys",
@@ -170,7 +165,6 @@ MODEL_SETTINGS = [
         "diff",
         weak_model_name="gpt-4o-mini",
         use_repo_map=True,
-        send_undo_reply=True,
         accepts_images=True,
         lazy=True,
         reminder="sys",
@@ -196,7 +190,6 @@ MODEL_SETTINGS = [
         "udiff",
         weak_model_name="gpt-4o-mini",
         use_repo_map=True,
-        send_undo_reply=True,
         lazy=True,
         reminder="sys",
         examples_as_sys_msg=True,
@@ -206,7 +199,6 @@ MODEL_SETTINGS = [
         "udiff",
         weak_model_name="gpt-4o-mini",
         use_repo_map=True,
-        send_undo_reply=True,
         lazy=True,
         reminder="sys",
     ),
@@ -215,7 +207,6 @@ MODEL_SETTINGS = [
         "diff",
         weak_model_name="gpt-4o-mini",
         use_repo_map=True,
-        send_undo_reply=True,
         accepts_images=True,
         reminder="sys",
     ),
@@ -224,7 +215,6 @@ MODEL_SETTINGS = [
         "diff",
         weak_model_name="gpt-4o-mini",
         use_repo_map=True,
-        send_undo_reply=True,
         reminder="sys",
         examples_as_sys_msg=True,
     ),
@@ -233,7 +223,6 @@ MODEL_SETTINGS = [
         "diff",
         weak_model_name="gpt-4o-mini",
         use_repo_map=True,
-        send_undo_reply=True,
         reminder="sys",
     ),
     ModelSettings(
@@ -241,7 +230,6 @@ MODEL_SETTINGS = [
         "diff",
         weak_model_name="gpt-4o-mini",
         use_repo_map=True,
-        send_undo_reply=True,
         reminder="sys",
     ),
     # Claude
@@ -250,14 +238,12 @@ MODEL_SETTINGS = [
         "diff",
         weak_model_name="claude-3-haiku-20240307",
         use_repo_map=True,
-        send_undo_reply=True,
     ),
     ModelSettings(
         "openrouter/anthropic/claude-3-opus",
         "diff",
         weak_model_name="openrouter/anthropic/claude-3-haiku",
         use_repo_map=True,
-        send_undo_reply=True,
     ),
     ModelSettings(
         "claude-3-sonnet-20240229",
@@ -340,7 +326,6 @@ MODEL_SETTINGS = [
         "diff",
         weak_model_name="vertex_ai/claude-3-haiku@20240307",
         use_repo_map=True,
-        send_undo_reply=True,
     ),
     ModelSettings(
         "vertex_ai/claude-3-sonnet@20240229",
@@ -353,7 +338,6 @@ MODEL_SETTINGS = [
         "whole",
         weak_model_name="command-r-plus",
         use_repo_map=True,
-        send_undo_reply=True,
     ),
     # Groq llama3
     ModelSettings(
@@ -378,19 +362,16 @@ MODEL_SETTINGS = [
         "gemini/gemini-1.5-pro",
         "diff-fenced",
         use_repo_map=True,
-        send_undo_reply=True,
     ),
     ModelSettings(
         "gemini/gemini-1.5-pro-latest",
         "diff-fenced",
         use_repo_map=True,
-        send_undo_reply=True,
     ),
     ModelSettings(
         "gemini/gemini-1.5-pro-exp-0827",
         "diff-fenced",
         use_repo_map=True,
-        send_undo_reply=True,
     ),
     ModelSettings(
         "gemini/gemini-1.5-flash-exp-0827",
@@ -402,7 +383,6 @@ MODEL_SETTINGS = [
         "deepseek/deepseek-chat",
         "diff",
         use_repo_map=True,
-        send_undo_reply=True,
         examples_as_sys_msg=True,
         reminder="sys",
     ),
@@ -410,7 +390,6 @@ MODEL_SETTINGS = [
         "deepseek/deepseek-coder",
         "diff",
         use_repo_map=True,
-        send_undo_reply=True,
         examples_as_sys_msg=True,
         reminder="sys",
         caches_by_default=True,
@@ -419,7 +398,6 @@ MODEL_SETTINGS = [
         "openrouter/deepseek/deepseek-coder",
         "diff",
         use_repo_map=True,
-        send_undo_reply=True,
         examples_as_sys_msg=True,
         reminder="sys",
     ),
@@ -428,7 +406,6 @@ MODEL_SETTINGS = [
         "diff",
         weak_model_name="openrouter/openai/gpt-4o-mini",
         use_repo_map=True,
-        send_undo_reply=True,
         accepts_images=True,
         lazy=True,
         reminder="sys",