Add GPT-5.5 Pro preset

README.md

@@ -94,6 +94,7 @@ curl http://127.0.0.1:8000/v1/chat/completions \
 ## Supported Models
 
 - `gpt-5.5`
+- `gpt-5.5-pro` (preset for `gpt-5.5` with xhigh reasoning)
 - `gpt-5.4`
 - `gpt-5.4-mini`
 - `gpt-5.2`

chatmock/fast_mode.py

@@ -9,6 +9,7 @@ from .model_registry import normalize_model_name
 PRIORITY_SUPPORTED_MODELS = frozenset(
     (
         "gpt-5.4",
+        "gpt-5.5",
         "gpt-5.2",
         "gpt-5.1",
         "gpt-5",

chatmock/model_registry.py

@@ -16,6 +16,7 @@ class ModelSpec:
     allowed_efforts: frozenset[str]
     variant_efforts: tuple[str, ...]
     uses_codex_instructions: bool = False
+    preset_effort: str | None = None
 
 
 _MODEL_SPECS = (
@@ -61,6 +62,14 @@ _MODEL_SPECS = (
         allowed_efforts=frozenset(("none", "low", "medium", "high", "xhigh")),
         variant_efforts=("xhigh", "high", "medium", "low", "none"),
     ),
+    ModelSpec(
+        public_id="gpt-5.5-pro",
+        upstream_id="gpt-5.5",
+        aliases=("gpt5.5-pro", "gpt-5.5-pro-latest"),
+        allowed_efforts=frozenset(("none", "low", "medium", "high", "xhigh")),
+        variant_efforts=(),
+        preset_effort="xhigh",
+    ),
     ModelSpec(
         public_id="gpt-5.3-codex",
         upstream_id="gpt-5.3-codex",
@@ -127,12 +136,12 @@ _MODEL_SPECS = (
     ),
 )
 
-_SPECS_BY_UPSTREAM = {spec.upstream_id: spec for spec in _MODEL_SPECS}
+_SPECS_BY_PUBLIC_ID = {spec.public_id: spec for spec in _MODEL_SPECS}
 _ALIASES = {}
 for _spec in _MODEL_SPECS:
-    _ALIASES[_spec.public_id] = _spec.upstream_id
+    _ALIASES[_spec.public_id] = _spec.public_id
     for _alias in _spec.aliases:
-        _ALIASES[_alias] = _spec.upstream_id
+        _ALIASES[_alias] = _spec.public_id
 
 
 def _strip_model_name(model: str | None) -> tuple[str, str | None]:
@@ -155,10 +164,10 @@ def _strip_model_name(model: str | None) -> tuple[str, str | None]:
 
 def model_spec_for_name(model: str | None) -> ModelSpec | None:
     base, _ = _strip_model_name(model)
-    upstream_id = _ALIASES.get(base)
-    if not upstream_id:
+    public_id = _ALIASES.get(base)
+    if not public_id:
         return None
-    return _SPECS_BY_UPSTREAM.get(upstream_id)
+    return _SPECS_BY_PUBLIC_ID.get(public_id)
 
 
 def normalize_model_name(model: str | None, debug_model: str | None = None) -> str:
@@ -187,6 +196,9 @@ def allowed_efforts_for_model(model: str | None) -> frozenset[str]:
 
 def extract_reasoning_from_model_name(model: str | None) -> dict[str, str] | None:
     _, effort = _strip_model_name(model)
+    if not effort:
+        spec = model_spec_for_name(model)
+        effort = spec.preset_effort if spec is not None else None
     if not effort:
         return None
     return {"effort": effort}

tests/test_models.py

@@ -2,7 +2,12 @@ from __future__ import annotations
 
 import unittest
 
-from chatmock.model_registry import allowed_efforts_for_model, list_public_models, normalize_model_name
+from chatmock.model_registry import (
+    allowed_efforts_for_model,
+    extract_reasoning_from_model_name,
+    list_public_models,
+    normalize_model_name,
+)
 
 
 class ModelRegistryTests(unittest.TestCase):
@@ -11,6 +16,7 @@ class ModelRegistryTests(unittest.TestCase):
         self.assertEqual(normalize_model_name("gpt5.4"), "gpt-5.4")
         self.assertEqual(normalize_model_name("gpt5.4-mini"), "gpt-5.4-mini")
         self.assertEqual(normalize_model_name("gpt5.5"), "gpt-5.5")
+        self.assertEqual(normalize_model_name("gpt-5.5-pro"), "gpt-5.5")
         self.assertEqual(normalize_model_name("gpt5.3-codex-spark"), "gpt-5.3-codex-spark")
         self.assertEqual(normalize_model_name("codex"), "codex-mini-latest")
 
@@ -24,13 +30,19 @@ class ModelRegistryTests(unittest.TestCase):
 
     def test_allowed_efforts_follow_registry(self) -> None:
         self.assertEqual(allowed_efforts_for_model("gpt-5.5"), frozenset(("none", "low", "medium", "high", "xhigh")))
+        self.assertEqual(allowed_efforts_for_model("gpt-5.5-pro"), frozenset(("none", "low", "medium", "high", "xhigh")))
         self.assertEqual(allowed_efforts_for_model("gpt-5.4"), frozenset(("none", "low", "medium", "high", "xhigh")))
         self.assertEqual(allowed_efforts_for_model("gpt-5.4-mini"), frozenset(("low", "medium", "high", "xhigh")))
         self.assertEqual(allowed_efforts_for_model("gpt-5.1-codex"), frozenset(("low", "medium", "high")))
 
+    def test_pro_preset_uses_xhigh_reasoning(self) -> None:
+        self.assertEqual(extract_reasoning_from_model_name("gpt-5.5-pro"), {"effort": "xhigh"})
+        self.assertEqual(extract_reasoning_from_model_name("gpt-5.5-pro-low"), {"effort": "low"})
+
     def test_public_models_include_variants(self) -> None:
         model_ids = list_public_models(expose_reasoning_models=True)
         self.assertIn("gpt-5.5", model_ids)
+        self.assertIn("gpt-5.5-pro", model_ids)
         self.assertIn("gpt-5.4", model_ids)
         self.assertIn("gpt-5.4-mini", model_ids)
         self.assertIn("gpt-5.3-codex-spark", model_ids)

tests/test_routes.py

@@ -59,6 +59,8 @@ class RouteTests(unittest.TestCase):
         body = response.get_json()
         self.assertEqual(response.status_code, 200)
         model_ids = [item["id"] for item in body["data"]]
+        self.assertIn("gpt-5.5", model_ids)
+        self.assertIn("gpt-5.5-pro", model_ids)
         self.assertIn("gpt-5.4", model_ids)
         self.assertIn("gpt-5.4-mini", model_ids)
         self.assertIn("gpt-5.3-codex-spark", model_ids)