feat: add claude-sonnet-4-6 model support

Author: DeveshParagiri

extropy/core/cost/pricing.py

@@ -54,6 +54,7 @@ class ModelPricing(BaseModel, frozen=True):
     ),
     "claude-sonnet-4.5": ModelPricing(input_per_mtok=3.00, output_per_mtok=15.00),
     "claude-sonnet-4": ModelPricing(input_per_mtok=3.00, output_per_mtok=15.00),
+    "claude-sonnet-4-6": ModelPricing(input_per_mtok=3.00, output_per_mtok=15.00),
     "claude-haiku-4-5-20251001": ModelPricing(
         input_per_mtok=0.80, output_per_mtok=4.00
     ),
@@ -72,7 +73,7 @@ class ModelPricing(BaseModel, frozen=True):
     },
     "anthropic": {
         "fast": "claude-haiku-4-5-20251001",
-        "strong": "claude-sonnet-4-5-20250929",
+        "strong": "claude-sonnet-4-6",
     },
     "azure": {
         "fast": "gpt-5-mini",
@@ -97,7 +98,7 @@ class ModelPricing(BaseModel, frozen=True):
     # Legacy aliases
     "claude": {
         "fast": "claude-haiku-4-5-20251001",
-        "strong": "claude-sonnet-4-5-20250929",
+        "strong": "claude-sonnet-4-6",
     },
     "azure_openai": {
         "fast": "gpt-5-mini",

extropy/core/providers/anthropic.py

@@ -150,7 +150,7 @@ def default_fast_model(self) -> str:
 
     @property
     def default_strong_model(self) -> str:
-        return "claude-sonnet-4-5-20250929"
+        return "claude-sonnet-4-6"
 
     def _get_client(self) -> anthropic.Anthropic:
         kwargs: dict = {"api_key": self._api_key}

extropy/core/rate_limits.py

@@ -70,6 +70,12 @@
             3: {"rpm": 2_000, "itpm": 800_000, "otpm": 160_000},
             4: {"rpm": 4_000, "itpm": 2_000_000, "otpm": 400_000},
         },
+        "claude-sonnet-4-6": {
+            1: {"rpm": 50, "itpm": 30_000, "otpm": 8_000},
+            2: {"rpm": 1_000, "itpm": 450_000, "otpm": 90_000},
+            3: {"rpm": 2_000, "itpm": 800_000, "otpm": 160_000},
+            4: {"rpm": 4_000, "itpm": 2_000_000, "otpm": 400_000},
+        },
         "claude-haiku-4.5": {
             1: {"rpm": 50, "itpm": 50_000, "otpm": 10_000},
             2: {"rpm": 1_000, "itpm": 450_000, "otpm": 90_000},