diff --git a/aider/resources/model-settings.yml b/aider/resources/model-settings.yml
index 2f9b6d3f3..1d3fdf5ee 100644
--- a/aider/resources/model-settings.yml
+++ b/aider/resources/model-settings.yml
@@ -2227,6 +2227,60 @@
   use_temperature: false
   accepts_settings: ["reasoning_effort"]
 
+- name: gpt-5.3
+  edit_format: diff
+  weak_model_name: gpt-5-nano
+  use_repo_map: true
+  use_temperature: false
+  accepts_settings: ["reasoning_effort"]
+  overeager: true
+
+- name: gpt-5.3-pro
+  streaming: false
+  edit_format: diff
+  weak_model_name: gpt-5-mini
+  use_repo_map: true
+  editor_model_name: gpt-5.3
+  editor_edit_format: editor-diff
+  system_prompt_prefix: "Formatting re-enabled. "
+  accepts_settings: ["reasoning_effort"]
+  examples_as_sys_msg: true
+  use_temperature: false
+
+- name: gpt-5.3-chat-latest
+  edit_format: diff
+  weak_model_name: gpt-5-nano
+  use_repo_map: true
+  use_temperature: false
+  accepts_settings: ["reasoning_effort"]
+
+- name: gpt-5.4
+  edit_format: diff
+  weak_model_name: gpt-5-nano
+  use_repo_map: true
+  use_temperature: false
+  accepts_settings: ["reasoning_effort"]
+  overeager: true
+
+- name: gpt-5.4-pro
+  streaming: false
+  edit_format: diff
+  weak_model_name: gpt-5-mini
+  use_repo_map: true
+  editor_model_name: gpt-5.4
+  editor_edit_format: editor-diff
+  system_prompt_prefix: "Formatting re-enabled. "
+  accepts_settings: ["reasoning_effort"]
+  examples_as_sys_msg: true
+  use_temperature: false
+
+- name: gpt-5.4-chat-latest
+  edit_format: diff
+  weak_model_name: gpt-5-nano
+  use_repo_map: true
+  use_temperature: false
+  accepts_settings: ["reasoning_effort"]
+
 - name: gpt-5-codex
   edit_format: diff
   weak_model_name: gpt-5-nano
@@ -2358,6 +2412,58 @@
   use_temperature: false
   accepts_settings: ["reasoning_effort"]
 
+- name: azure/gpt-5.3
+  edit_format: diff
+  weak_model_name: azure/gpt-5-nano
+  use_repo_map: true
+  use_temperature: false
+  accepts_settings: ["reasoning_effort"]
+
+- name: azure/gpt-5.3-pro
+  streaming: false
+  edit_format: diff
+  weak_model_name: azure/gpt-5-mini
+  use_repo_map: true
+  editor_model_name: azure/gpt-5.3
+  editor_edit_format: editor-diff
+  system_prompt_prefix: "Formatting re-enabled. "
+  accepts_settings: ["reasoning_effort"]
+  examples_as_sys_msg: true
+  use_temperature: false
+
+- name: azure/gpt-5.3-chat-latest
+  edit_format: diff
+  weak_model_name: azure/gpt-5-nano
+  use_repo_map: true
+  use_temperature: false
+  accepts_settings: ["reasoning_effort"]
+
+- name: azure/gpt-5.4
+  edit_format: diff
+  weak_model_name: azure/gpt-5-nano
+  use_repo_map: true
+  use_temperature: false
+  accepts_settings: ["reasoning_effort"]
+
+- name: azure/gpt-5.4-pro
+  streaming: false
+  edit_format: diff
+  weak_model_name: azure/gpt-5-mini
+  use_repo_map: true
+  editor_model_name: azure/gpt-5.4
+  editor_edit_format: editor-diff
+  system_prompt_prefix: "Formatting re-enabled. "
+  accepts_settings: ["reasoning_effort"]
+  examples_as_sys_msg: true
+  use_temperature: false
+
+- name: azure/gpt-5.4-chat-latest
+  edit_format: diff
+  weak_model_name: azure/gpt-5-nano
+  use_repo_map: true
+  use_temperature: false
+  accepts_settings: ["reasoning_effort"]
+
 - name: openai/gpt-5
   edit_format: diff
   weak_model_name: openai/gpt-5-nano
@@ -2487,6 +2593,58 @@
   use_temperature: false
   accepts_settings: ["reasoning_effort"]
 
+- name: openai/gpt-5.3
+  edit_format: diff
+  weak_model_name: openai/gpt-5-nano
+  use_repo_map: true
+  use_temperature: false
+  accepts_settings: ["reasoning_effort"]
+
+- name: openai/gpt-5.3-pro
+  streaming: false
+  edit_format: diff
+  weak_model_name: openai/gpt-5-mini
+  use_repo_map: true
+  editor_model_name: openai/gpt-5.3
+  editor_edit_format: editor-diff
+  system_prompt_prefix: "Formatting re-enabled. "
+  accepts_settings: ["reasoning_effort"]
+  examples_as_sys_msg: true
+  use_temperature: false
+
+- name: openai/gpt-5.3-chat-latest
+  edit_format: diff
+  weak_model_name: openai/gpt-5-nano
+  use_repo_map: true
+  use_temperature: false
+  accepts_settings: ["reasoning_effort"]
+
+- name: openai/gpt-5.4
+  edit_format: diff
+  weak_model_name: openai/gpt-5-nano
+  use_repo_map: true
+  use_temperature: false
+  accepts_settings: ["reasoning_effort"]
+
+- name: openai/gpt-5.4-pro
+  streaming: false
+  edit_format: diff
+  weak_model_name: openai/gpt-5-mini
+  use_repo_map: true
+  editor_model_name: openai/gpt-5.4
+  editor_edit_format: editor-diff
+  system_prompt_prefix: "Formatting re-enabled. "
+  accepts_settings: ["reasoning_effort"]
+  examples_as_sys_msg: true
+  use_temperature: false
+
+- name: openai/gpt-5.4-chat-latest
+  edit_format: diff
+  weak_model_name: openai/gpt-5-nano
+  use_repo_map: true
+  use_temperature: false
+  accepts_settings: ["reasoning_effort"]
+
 - name: openrouter/openai/gpt-5
   edit_format: diff
   weak_model_name: openrouter/openai/gpt-5-nano
@@ -2616,6 +2774,58 @@
   use_temperature: false
   accepts_settings: ["reasoning_effort"]
 
+- name: openrouter/openai/gpt-5.3
+  edit_format: diff
+  weak_model_name: openrouter/openai/gpt-5-nano
+  use_repo_map: true
+  use_temperature: false
+  accepts_settings: ["reasoning_effort"]
+
+- name: openrouter/openai/gpt-5.3-pro
+  streaming: false
+  edit_format: diff
+  weak_model_name: openrouter/openai/gpt-5-mini
+  use_repo_map: true
+  editor_model_name: openrouter/openai/gpt-5.3
+  editor_edit_format: editor-diff
+  system_prompt_prefix: "Formatting re-enabled. "
+  accepts_settings: ["reasoning_effort"]
+  examples_as_sys_msg: true
+  use_temperature: false
+
+- name: openrouter/openai/gpt-5.3-chat-latest
+  edit_format: diff
+  weak_model_name: openrouter/openai/gpt-5-nano
+  use_repo_map: true
+  use_temperature: false
+  accepts_settings: ["reasoning_effort"]
+
+- name: openrouter/openai/gpt-5.4
+  edit_format: diff
+  weak_model_name: openrouter/openai/gpt-5-nano
+  use_repo_map: true
+  use_temperature: false
+  accepts_settings: ["reasoning_effort"]
+
+- name: openrouter/openai/gpt-5.4-pro
+  streaming: false
+  edit_format: diff
+  weak_model_name: openrouter/openai/gpt-5-mini
+  use_repo_map: true
+  editor_model_name: openrouter/openai/gpt-5.4
+  editor_edit_format: editor-diff
+  system_prompt_prefix: "Formatting re-enabled. "
+  accepts_settings: ["reasoning_effort"]
+  examples_as_sys_msg: true
+  use_temperature: false
+
+- name: openrouter/openai/gpt-5.4-chat-latest
+  edit_format: diff
+  weak_model_name: openrouter/openai/gpt-5-nano
+  use_repo_map: true
+  use_temperature: false
+  accepts_settings: ["reasoning_effort"]
+
 - name: gpt-4.1-nano
   edit_format: diff
   weak_model_name: gpt-4.1-nano