From aca10df765c77bc7f69b3c6085dc494a0f4394f0 Mon Sep 17 00:00:00 2001
From: Lee Penkman <leepenkman@gmail.com>
Date: Wed, 1 Jul 2026 19:01:59 +1200
Subject: [PATCH] fix: allow app.nz reasoning effort

---
 litellm/llms/openai_like/dynamic_config.py    |  3 +++
 litellm/llms/openai_like/json_loader.py       |  1 +
 litellm/llms/openai_like/providers.json       |  3 ++-
 .../llms/openai_like/test_appnz_provider.py   | 22 +++++++++++++++++++
 4 files changed, 28 insertions(+), 1 deletion(-)

diff --git a/litellm/llms/openai_like/dynamic_config.py b/litellm/llms/openai_like/dynamic_config.py
index 3c763ed9b9b..fcff1fbcf4e 100644
--- a/litellm/llms/openai_like/dynamic_config.py
+++ b/litellm/llms/openai_like/dynamic_config.py
@@ -94,6 +94,9 @@ def create_config_class(provider: SimpleProviderConfig):
             from litellm.utils import supports_function_calling
 
             supported_params = super().get_supported_openai_params(model=model)
+            supported_params = list(
+                dict.fromkeys([*supported_params, *provider.extra_supported_params])
+            )
 
             _supports_fc = supports_function_calling(model=model, custom_llm_provider=provider.slug)
 
diff --git a/litellm/llms/openai_like/json_loader.py b/litellm/llms/openai_like/json_loader.py
index 4640bb8a422..4e9e8099c6c 100644
--- a/litellm/llms/openai_like/json_loader.py
+++ b/litellm/llms/openai_like/json_loader.py
@@ -19,6 +19,7 @@ class SimpleProviderConfig:
         self.api_base_env = data.get("api_base_env")
         self.base_class = data.get("base_class", "openai_gpt")
         self.param_mappings = data.get("param_mappings", {})
+        self.extra_supported_params = data.get("extra_supported_params", [])
         self.constraints = data.get("constraints", {})
         self.special_handling = data.get("special_handling", {})
         self.supported_endpoints = data.get("supported_endpoints", [])
diff --git a/litellm/llms/openai_like/providers.json b/litellm/llms/openai_like/providers.json
index 7c42bd46479..8849b3fa265 100644
--- a/litellm/llms/openai_like/providers.json
+++ b/litellm/llms/openai_like/providers.json
@@ -181,6 +181,7 @@
     "base_url": "https://app.nz/v1",
     "api_key_env": "APP_NZ_API_KEY",
     "api_base_env": "APP_NZ_API_BASE",
-    "base_class": "openai_gpt"
+    "base_class": "openai_gpt",
+    "extra_supported_params": ["reasoning_effort"]
   }
 }
diff --git a/tests/test_litellm/llms/openai_like/test_appnz_provider.py b/tests/test_litellm/llms/openai_like/test_appnz_provider.py
index a72f63cbca6..df614ddcf3c 100644
--- a/tests/test_litellm/llms/openai_like/test_appnz_provider.py
+++ b/tests/test_litellm/llms/openai_like/test_appnz_provider.py
@@ -20,6 +20,7 @@ class TestAppNZProviderConfig:
         assert app_nz.api_key_env == "APP_NZ_API_KEY"
         assert app_nz.api_base_env == "APP_NZ_API_BASE"
         assert app_nz.base_class == "openai_gpt"
+        assert app_nz.extra_supported_params == ["reasoning_effort"]
 
     def test_appnz_provider_resolution(self):
         """Resolving an app_nz/* model returns the default app.nz base URL"""
@@ -82,3 +83,24 @@ class TestAppNZProviderConfig:
         )
 
         assert url == "https://app.nz/v1/chat/completions"
+
+    def test_appnz_supports_reasoning_effort(self):
+        """app.nz forwards its documented reasoning_effort parameter"""
+        from litellm.llms.openai_like.dynamic_config import create_config_class
+        from litellm.llms.openai_like.json_loader import JSONProviderRegistry
+
+        provider = JSONProviderRegistry.get("app_nz")
+        config_class = create_config_class(provider)
+        config = config_class()
+
+        supported_params = config.get_supported_openai_params(model="app/auto")
+        assert "reasoning_effort" in supported_params
+
+        optional_params = config.map_openai_params(
+            non_default_params={"reasoning_effort": "auto"},
+            optional_params={},
+            model="app/auto",
+            drop_params=False,
+        )
+
+        assert optional_params["reasoning_effort"] == "auto"