feat: add gpt-5.5 model settings across providers

Co-authored-by: aider (gpt-5.4) <aider@aider.chat>

aider/models.py

@@ -52,6 +52,9 @@ gpt-4-vision-preview
 gpt-4-1106-vision-preview
 gpt-4o-mini
 gpt-4o-mini-2024-07-18
+gpt-5.5
+gpt-5.5-pro
+gpt-5.5-chat-latest
 gpt-3.5-turbo
 gpt-3.5-turbo-0301
 gpt-3.5-turbo-0613

aider/resources/model-settings.yml

@@ -2349,6 +2349,33 @@
   use_temperature: false
   accepts_settings: ["reasoning_effort"]
 
+- name: gpt-5.5
+  edit_format: diff
+  weak_model_name: gpt-5-nano
+  use_repo_map: true
+  use_temperature: false
+  accepts_settings: ["reasoning_effort"]
+  overeager: true
+
+- name: gpt-5.5-pro
+  streaming: false
+  edit_format: diff
+  weak_model_name: gpt-5-mini
+  use_repo_map: true
+  editor_model_name: gpt-5.5
+  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-5.5-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
@@ -2532,6 +2559,32 @@
   use_temperature: false
   accepts_settings: ["reasoning_effort"]
 
+- name: azure/gpt-5.5
+  edit_format: diff
+  weak_model_name: azure/gpt-5-nano
+  use_repo_map: true
+  use_temperature: false
+  accepts_settings: ["reasoning_effort"]
+
+- name: azure/gpt-5.5-pro
+  streaming: false
+  edit_format: diff
+  weak_model_name: azure/gpt-5-mini
+  use_repo_map: true
+  editor_model_name: azure/gpt-5.5
+  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-5.5-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
@@ -2713,6 +2766,32 @@
   use_temperature: false
   accepts_settings: ["reasoning_effort"]
 
+- name: openai/gpt-5.5
+  edit_format: diff
+  weak_model_name: openai/gpt-5-nano
+  use_repo_map: true
+  use_temperature: false
+  accepts_settings: ["reasoning_effort"]
+
+- name: openai/gpt-5.5-pro
+  streaming: false
+  edit_format: diff
+  weak_model_name: openai/gpt-5-mini
+  use_repo_map: true
+  editor_model_name: openai/gpt-5.5
+  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-5.5-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
@@ -2894,6 +2973,32 @@
   use_temperature: false
   accepts_settings: ["reasoning_effort"]
 
+- name: openrouter/openai/gpt-5.5
+  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-5.5-pro
+  streaming: false
+  edit_format: diff
+  weak_model_name: openrouter/openai/gpt-5-mini
+  use_repo_map: true
+  editor_model_name: openrouter/openai/gpt-5.5
+  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-5.5-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

tests/basic/test_models.py

@@ -555,6 +555,46 @@ class TestModels(unittest.TestCase):
             timeout=600,
         )
 
+    def test_gpt_5_5_model_settings(self):
+        base_models = [
+            "gpt-5.5",
+            "gpt-5.5-chat-latest",
+            "openai/gpt-5.5",
+            "openai/gpt-5.5-chat-latest",
+            "azure/gpt-5.5",
+            "azure/gpt-5.5-chat-latest",
+            "openrouter/openai/gpt-5.5",
+            "openrouter/openai/gpt-5.5-chat-latest",
+        ]
+
+        for name in base_models:
+            with self.subTest(name=name):
+                model = Model(name)
+                self.assertEqual(model.edit_format, "diff")
+                self.assertTrue(model.use_repo_map)
+                self.assertFalse(model.use_temperature)
+                self.assertIn("reasoning_effort", model.accepts_settings)
+
+        self.assertTrue(Model("gpt-5.5").overeager)
+
+        pro_models = {
+            "gpt-5.5-pro": "gpt-5.5",
+            "openai/gpt-5.5-pro": "openai/gpt-5.5",
+            "azure/gpt-5.5-pro": "azure/gpt-5.5",
+            "openrouter/openai/gpt-5.5-pro": "openrouter/openai/gpt-5.5",
+        }
+
+        for name, editor_name in pro_models.items():
+            with self.subTest(name=name):
+                model = Model(name)
+                self.assertFalse(model.streaming)
+                self.assertEqual(model.edit_format, "diff")
+                self.assertTrue(model.use_repo_map)
+                self.assertFalse(model.use_temperature)
+                self.assertEqual(model.editor_model_name, editor_name)
+                self.assertEqual(model.editor_model.name, editor_name)
+                self.assertIn("reasoning_effort", model.accepts_settings)
+
 
 if __name__ == "__main__":
     unittest.main()