diff --git a/pydantic_ai_slim/pydantic_ai/models/instrumented.py b/pydantic_ai_slim/pydantic_ai/models/instrumented.py
index 3587eaa8ff..b5beae9b57 100644
--- a/pydantic_ai_slim/pydantic_ai/models/instrumented.py
+++ b/pydantic_ai_slim/pydantic_ai/models/instrumented.py
@@ -112,7 +112,7 @@ async def request(
         model_settings: ModelSettings | None,
         model_request_parameters: ModelRequestParameters,
     ) -> tuple[ModelResponse, Usage]:
-        with self._instrument(messages, model_settings) as finish:
+        with self._instrument(messages, model_settings, model_request_parameters) as finish:
             response, usage = await super().request(messages, model_settings, model_request_parameters)
             finish(response, usage)
             return response, usage
@@ -124,7 +124,7 @@ async def request_stream(
         model_settings: ModelSettings | None,
         model_request_parameters: ModelRequestParameters,
     ) -> AsyncIterator[StreamedResponse]:
-        with self._instrument(messages, model_settings) as finish:
+        with self._instrument(messages, model_settings, model_request_parameters) as finish:
             response_stream: StreamedResponse | None = None
             try:
                 async with super().request_stream(
@@ -140,6 +140,7 @@ def _instrument(
         self,
         messages: list[ModelMessage],
         model_settings: ModelSettings | None,
+        model_request_parameters: ModelRequestParameters,
     ) -> Iterator[Callable[[ModelResponse, Usage], None]]:
         operation = 'chat'
         span_name = f'{operation} {self.model_name}'
@@ -149,6 +150,13 @@ def _instrument(
         attributes: dict[str, AttributeValue] = {
             'gen_ai.operation.name': operation,
             **self.model_attributes(self.wrapped),
+            'model_request_parameters': json.dumps(InstrumentedModel.serialize_any(model_request_parameters)),
+            'logfire.json_schema': json.dumps(
+                {
+                    'type': 'object',
+                    'properties': {'model_request_parameters': {'type': 'object'}},
+                }
+            ),
         }
 
         if model_settings:
@@ -201,7 +209,10 @@ def _emit_events(self, span: Span, events: list[Event]) -> None:
                     'logfire.json_schema': json.dumps(
                         {
                             'type': 'object',
-                            'properties': {attr_name: {'type': 'array'}},
+                            'properties': {
+                                attr_name: {'type': 'array'},
+                                'model_request_parameters': {'type': 'object'},
+                            },
                         }
                     ),
                 }
diff --git a/tests/models/test_fallback.py b/tests/models/test_fallback.py
index d22d9737af..b0381e315f 100644
--- a/tests/models/test_fallback.py
+++ b/tests/models/test_fallback.py
@@ -136,6 +136,7 @@ def test_first_failed_instrumented(capfire: CaptureLogfire) -> None:
                 'end_time': 5000000000,
                 'attributes': {
                     'gen_ai.operation.name': 'chat',
+                    'model_request_parameters': '{"function_tools": [], "allow_text_result": true, "result_tools": []}',
                     'logfire.span_type': 'span',
                     'logfire.msg': 'chat fallback:function:failure_response:,function:success_response:',
                     'gen_ai.usage.input_tokens': 51,
@@ -160,7 +161,7 @@ def test_first_failed_instrumented(capfire: CaptureLogfire) -> None:
                             },
                         ]
                     ),
-                    'logfire.json_schema': '{"type": "object", "properties": {"events": {"type": "array"}}}',
+                    'logfire.json_schema': '{"type": "object", "properties": {"events": {"type": "array"}, "model_request_parameters": {"type": "object"}}}',
                 },
             },
             {
@@ -233,6 +234,7 @@ async def test_first_failed_instrumented_stream(capfire: CaptureLogfire) -> None
                 'end_time': 5000000000,
                 'attributes': {
                     'gen_ai.operation.name': 'chat',
+                    'model_request_parameters': '{"function_tools": [], "allow_text_result": true, "result_tools": []}',
                     'logfire.span_type': 'span',
                     'logfire.msg': 'chat fallback:function::failure_response_stream,function::success_response_stream',
                     'gen_ai.system': 'function',
@@ -241,7 +243,7 @@ async def test_first_failed_instrumented_stream(capfire: CaptureLogfire) -> None
                     'gen_ai.usage.output_tokens': 2,
                     'gen_ai.response.model': 'function::success_response_stream',
                     'events': '[{"content": "input", "role": "user", "gen_ai.system": "function", "gen_ai.message.index": 0, "event.name": "gen_ai.user.message"}, {"index": 0, "message": {"role": "assistant", "content": "hello world"}, "gen_ai.system": "function", "event.name": "gen_ai.choice"}]',
-                    'logfire.json_schema': '{"type": "object", "properties": {"events": {"type": "array"}}}',
+                    'logfire.json_schema': '{"type": "object", "properties": {"events": {"type": "array"}, "model_request_parameters": {"type": "object"}}}',
                 },
             },
             {
diff --git a/tests/models/test_instrumented.py b/tests/models/test_instrumented.py
index 85cb18b752..dc813b212d 100644
--- a/tests/models/test_instrumented.py
+++ b/tests/models/test_instrumented.py
@@ -152,6 +152,8 @@ async def test_instrumented_model(capfire: CaptureLogfire):
                     'gen_ai.request.model': 'my_model',
                     'server.address': 'example.com',
                     'server.port': 8000,
+                    'model_request_parameters': '{"function_tools": [], "allow_text_result": true, "result_tools": []}',
+                    'logfire.json_schema': '{"type": "object", "properties": {"model_request_parameters": {"type": "object"}}}',
                     'gen_ai.request.temperature': 1,
                     'logfire.msg': 'chat my_model',
                     'logfire.span_type': 'span',
@@ -374,6 +376,8 @@ async def test_instrumented_model_stream(capfire: CaptureLogfire):
                     'gen_ai.request.model': 'my_model',
                     'server.address': 'example.com',
                     'server.port': 8000,
+                    'model_request_parameters': '{"function_tools": [], "allow_text_result": true, "result_tools": []}',
+                    'logfire.json_schema': '{"type": "object", "properties": {"model_request_parameters": {"type": "object"}}}',
                     'gen_ai.request.temperature': 1,
                     'logfire.msg': 'chat my_model',
                     'logfire.span_type': 'span',
@@ -457,6 +461,8 @@ async def test_instrumented_model_stream_break(capfire: CaptureLogfire):
                     'gen_ai.request.model': 'my_model',
                     'server.address': 'example.com',
                     'server.port': 8000,
+                    'model_request_parameters': '{"function_tools": [], "allow_text_result": true, "result_tools": []}',
+                    'logfire.json_schema': '{"type": "object", "properties": {"model_request_parameters": {"type": "object"}}}',
                     'gen_ai.request.temperature': 1,
                     'logfire.msg': 'chat my_model',
                     'logfire.span_type': 'span',
@@ -559,6 +565,7 @@ async def test_instrumented_model_attributes_mode(capfire: CaptureLogfire):
                     'gen_ai.request.model': 'my_model',
                     'server.address': 'example.com',
                     'server.port': 8000,
+                    'model_request_parameters': '{"function_tools": [], "allow_text_result": true, "result_tools": []}',
                     'gen_ai.request.temperature': 1,
                     'logfire.msg': 'chat my_model',
                     'logfire.span_type': 'span',
@@ -652,7 +659,7 @@ async def test_instrumented_model_attributes_mode(capfire: CaptureLogfire):
                             ]
                         )
                     ),
-                    'logfire.json_schema': '{"type": "object", "properties": {"events": {"type": "array"}}}',
+                    'logfire.json_schema': '{"type": "object", "properties": {"events": {"type": "array"}, "model_request_parameters": {"type": "object"}}}',
                 },
             },
         ]
diff --git a/tests/test_logfire.py b/tests/test_logfire.py
index ed72235123..7b0226f940 100644
--- a/tests/test_logfire.py
+++ b/tests/test_logfire.py
@@ -167,7 +167,7 @@ async def my_ret(x: int) -> str:
     )
     chat_span_attributes = summary.attributes[2]
     if instrument is True or instrument.event_mode == 'attributes':
-        attribute_mode_attributes = {k: chat_span_attributes.pop(k) for k in ['events', 'logfire.json_schema']}
+        attribute_mode_attributes = {k: chat_span_attributes.pop(k) for k in ['events']}
         assert attribute_mode_attributes == snapshot(
             {
                 'events': IsJson(
@@ -198,7 +198,6 @@ async def my_ret(x: int) -> str:
                         ]
                     )
                 ),
-                'logfire.json_schema': '{"type": "object", "properties": {"events": {"type": "array"}}}',
             }
         )
 
@@ -207,6 +206,28 @@ async def my_ret(x: int) -> str:
             'gen_ai.operation.name': 'chat',
             'gen_ai.system': 'test',
             'gen_ai.request.model': 'test',
+            'model_request_parameters': IsJson(
+                snapshot(
+                    {
+                        'function_tools': [
+                            {
+                                'name': 'my_ret',
+                                'description': '',
+                                'parameters_json_schema': {
+                                    'additionalProperties': False,
+                                    'properties': {'x': {'type': 'integer'}},
+                                    'required': ['x'],
+                                    'type': 'object',
+                                },
+                                'outer_typed_dict_key': None,
+                            }
+                        ],
+                        'allow_text_result': True,
+                        'result_tools': [],
+                    }
+                )
+            ),
+            'logfire.json_schema': IsJson(),
             'logfire.span_type': 'span',
             'logfire.msg': 'chat test',
             'gen_ai.response.model': 'test',