diff --git a/Autotests/unit/test_llm_budget.py b/Autotests/unit/test_llm_budget.py
index 95904e74..2cca1fb1 100644
--- a/Autotests/unit/test_llm_budget.py
+++ b/Autotests/unit/test_llm_budget.py
@@ -26,12 +26,17 @@ def _exec(name, path, register):
     return module
 
 
+# Values the stubbed config module returns for keys the tests control;
+# anything else falls back to the caller's default.
+CONFIG_STUB = {}
+
+
 def _load_modules():
     openai_stub = types.ModuleType("openai")
     openai_stub.OpenAI = object
 
     config_stub = types.ModuleType("config")
-    config_stub.config_get_by_key = lambda key, default=None: default
+    config_stub.config_get_by_key = lambda key, default=None: CONFIG_STUB.get(key, default)
 
     stubs = {"openai": openai_stub, "config": config_stub}
     saved = {name: sys.modules.get(name) for name in list(stubs) + ["providers", "lib_llm_ext"]}
@@ -232,6 +237,46 @@ def test_openrouter_reasoning_body(effort, want):
     assert create.calls[0]["extra_body"]["reasoning"] == want
 
 
+@pytest.mark.parametrize("effort, want", [
+    ("medium", "medium"),
+    ("none", "none"),
+])
+def test_base_provider_forwards_reasoning_effort(effort, want):
+    create = FakeCreate(chat_response([tool_call("call_1", "send", '{"content": "hi"}')], "tool_calls",
+                                      completion_tokens=40, reasoning_tokens=30))
+    make_anthropic(create).chat(make_request(reasoning=effort))
+    assert create.calls[0]["extra_body"]["reasoning_effort"] == want
+
+
+def test_base_provider_omits_reasoning_when_unset():
+    create = FakeCreate(chat_response([tool_call("call_1", "send", '{"content": "hi"}')], "tool_calls",
+                                      completion_tokens=40, reasoning_tokens=30))
+    make_anthropic(create).chat(make_request(reasoning=None))
+    assert "extra_body" not in create.calls[0]
+
+
+def test_base_provider_omits_reasoning_when_effort_unsupported():
+    CONFIG_STUB["supportsReasoningEffort"] = False
+    try:
+        create = FakeCreate(chat_response([tool_call("call_1", "send", '{"content": "hi"}')], "tool_calls",
+                                          completion_tokens=40, reasoning_tokens=30))
+        make_anthropic(create).chat(make_request(reasoning="medium"))
+        assert "extra_body" not in create.calls[0]
+    finally:
+        del CONFIG_STUB["supportsReasoningEffort"]
+
+
+def test_base_provider_sends_reasoning_when_effort_supported():
+    CONFIG_STUB["supportsReasoningEffort"] = True
+    try:
+        create = FakeCreate(chat_response([tool_call("call_1", "send", '{"content": "hi"}')], "tool_calls",
+                                          completion_tokens=40, reasoning_tokens=30))
+        make_anthropic(create).chat(make_request(reasoning="medium"))
+        assert create.calls[0]["extra_body"]["reasoning_effort"] == "medium"
+    finally:
+        del CONFIG_STUB["supportsReasoningEffort"]
+
+
 def test_usage_is_logged_at_info(caplog):
     caplog.set_level(logging.INFO)
     create = FakeCreate(chat_response([tool_call("call_1", "send", '{"content": "hi"}')], "tool_calls",
diff --git a/config/config.yaml b/config/config.yaml
index 8cbf65da..0cc50b71 100644
--- a/config/config.yaml
+++ b/config/config.yaml
@@ -14,6 +14,10 @@ provider: Anthropic
 maxOutputToken: 6000
 # Reasoning-effort hint passed to the provider
 reasoningMode: medium
+# Set false for models that reject the reasoning_effort request parameter
+# (e.g. non-reasoning OpenAI models served through the OpenAIAPI provider):
+# the hint is then omitted from provider requests.
+supportsReasoningEffort: true
 # How long idle before the next scheduled wake-up (seconds)
 wakeupInterval: 600
 # Path to the logger configuration file
diff --git a/providers/lib_llm_ext.py b/providers/lib_llm_ext.py
index bd1b216f..70636c59 100644
--- a/providers/lib_llm_ext.py
+++ b/providers/lib_llm_ext.py
@@ -338,13 +338,22 @@ def convert_tool(self, tool: LLMTool) -> Dict:
         }
 
     def convert_request(self, request: LLMRequest) -> Dict[str, Any]:
-        return {
+        result = {
             "model": self._model_name,
             "messages": [self.convert_message(msg) for msg in request.messages],
             "max_tokens": request.max_tokens,
             "tools": [self.convert_tool(tool) for tool in request.tools],
             "tool_choice": "required",
         }
+        reasoning = getattr(request, "reasoning_mode", None)
+        if reasoning and config_get_by_key("supportsReasoningEffort", True):
+            # OpenAI-compatible servers (llama.cpp, vLLM, Strata, ...) accept
+            # reasoning_effort; "none" disables thinking. Plain OpenAI chat
+            # completions endpoints ignore unknown fields. Models that reject
+            # the parameter (e.g. non-reasoning OpenAI models) need it omitted:
+            # set supportsReasoningEffort: false for those.
+            result["extra_body"] = {"reasoning_effort": str(reasoning).lower()}
+        return result
 
     def convert_response(self, raw):
         response = LLMResponse()