diff --git a/docs/conf.py b/docs/conf.py
index 8135a723..f3db9244 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -76,6 +76,7 @@
     ('py:class', 'yandex_cloud_ml_sdk._types.schemas.JsonArray'),
     ('py:class', "'yandex_cloud_ml_sdk._types.schemas.JsonArray'"),
     ('py:class', 'JsonObject'),
+    ('py:class', 'JsonArray'),
     ('py:class', 'JsonSchemaType'),
     ('py:class', 'ResponseType'),
 }
diff --git a/docs/types/other.rst b/docs/types/other.rst
index f9fff489..89a09fe0 100644
--- a/docs/types/other.rst
+++ b/docs/types/other.rst
@@ -84,3 +84,21 @@ Miscellaneous types
    :no-inherited-members:
 
 .. py:class:: yandex_cloud_ml_sdk._tools.tool_call_list.HttpToolCallList
+
+
+Completions-related types
+~~~~~~~~~~~~~~~~~~~~~~~~~
+
+.. py:class:: yandex_cloud_ml_sdk._chat.completions.config.ChatReasoningModeType
+
+.. autodata:: yandex_cloud_ml_sdk._chat.completions.config.ChatReasoningModeType
+
+.. py:class:: yandex_cloud_ml_sdk._chat.completions.config.QueryType
+
+.. py:class:: yandex_cloud_ml_sdk._models.completions.config.CompletionTool
+
+.. autodata:: yandex_cloud_ml_sdk._models.completions.config.CompletionTool
+
+.. py:class:: yandex_cloud_ml_sdk._types.tools.tool_choice.ToolChoiceType
+
+.. autodata:: yandex_cloud_ml_sdk._types.tools.tool_choice.ToolChoiceType
diff --git a/examples/async/chat/extra_query.py b/examples/async/chat/extra_query.py
new file mode 100755
index 00000000..21619500
--- /dev/null
+++ b/examples/async/chat/extra_query.py
@@ -0,0 +1,56 @@
+#!/usr/bin/env python3
+
+from __future__ import annotations
+
+import asyncio
+
+from yandex_cloud_ml_sdk import AsyncYCloudML
+
+
+async def get_model(sdk: AsyncYCloudML):
+    models = await sdk.chat.completions.list()
+    i = 0
+    print('You have access to the following models:')
+    for i, model in enumerate(models):
+        print(f"  [{i:2}] {model.uri}")
+
+    raw_number = input(f"Please, input model number from 0 to {i}: ")
+    number = int(raw_number)
+    return models[number]
+
+
+async def main() -> None:
+    sdk = AsyncYCloudML(folder_id='b1ghsjum2v37c2un8h64')
+    sdk.setup_default_logging()
+
+    model = await get_model(sdk)
+
+    # You could pass any extra query parameters to the model
+    # via extra_query configuration parameter
+    model = model.configure(temperature=0.5, extra_query={'top_p': 0.2})
+
+    # Note that reconfiguring extra_query will rewrite it's value entirely
+    # without any merging
+    model = model.configure(extra_query={'top_k': 2})
+    print(f"{model.config.extra_query=} {model.config.temperature=}")
+
+    request = 'Say random number from 0 to 10'
+    for title, extra_query in (
+        ('deterministic', {'top_k': 2, 'top_p': 0.1}),
+        ('another deterministic', {'top_k': 2, 'top_p': 0.1}),
+        ('more random', {'top_k': 5, 'top_p': 1}),
+        ('another more random', {'top_k': 5, 'top_p': 1}),
+    ):
+        model = model.configure(extra_query=extra_query)
+        result = await model.run(request)
+        print(f"{title} result: {result.text}")
+
+    # Also note that there is no client validation about extra query value at all:
+    model = model.configure(extra_query={'foo': 2})
+    # This will not fail:
+    await model.run(request)
+    # So, refer to models documentation to find out about extra model parameters
+
+
+if __name__ == '__main__':
+    asyncio.run(main())
diff --git a/examples/sync/chat/extra_query.py b/examples/sync/chat/extra_query.py
new file mode 100755
index 00000000..cb466c31
--- /dev/null
+++ b/examples/sync/chat/extra_query.py
@@ -0,0 +1,54 @@
+#!/usr/bin/env python3
+
+from __future__ import annotations
+
+from yandex_cloud_ml_sdk import YCloudML
+
+
+def get_model(sdk: YCloudML):
+    models = sdk.chat.completions.list()
+    i = 0
+    print('You have access to the following models:')
+    for i, model in enumerate(models):
+        print(f"  [{i:2}] {model.uri}")
+
+    raw_number = input(f"Please, input model number from 0 to {i}: ")
+    number = int(raw_number)
+    return models[number]
+
+
+def main() -> None:
+    sdk = YCloudML(folder_id='b1ghsjum2v37c2un8h64')
+    sdk.setup_default_logging()
+
+    model = get_model(sdk)
+
+    # You could pass any extra query parameters to the model
+    # via extra_query configuration parameter
+    model = model.configure(temperature=0.5, extra_query={'top_p': 0.2})
+
+    # Note that reconfiguring extra_query will rewrite it's value entirely
+    # without any merging
+    model = model.configure(extra_query={'top_k': 2})
+    print(f"{model.config.extra_query=} {model.config.temperature=}")
+
+    request = 'Say random number from 0 to 10'
+    for title, extra_query in (
+        ('deterministic', {'top_k': 2, 'top_p': 0.1}),
+        ('another deterministic', {'top_k': 2, 'top_p': 0.1}),
+        ('more random', {'top_k': 5, 'top_p': 1}),
+        ('another more random', {'top_k': 5, 'top_p': 1}),
+    ):
+        model = model.configure(extra_query=extra_query)
+        result = model.run(request)
+        print(f"{title} result: {result.text}")
+
+    # Also note that there is no client validation about extra query value at all:
+    model = model.configure(extra_query={'foo': 2})
+    # This will not fail:
+    model.run(request)
+    # So, refer to models documentation to find out about extra model parameters
+
+
+if __name__ == '__main__':
+    main()
diff --git a/src/yandex_cloud_ml_sdk/_chat/completions/config.py b/src/yandex_cloud_ml_sdk/_chat/completions/config.py
index 7450ad2f..394e0870 100644
--- a/src/yandex_cloud_ml_sdk/_chat/completions/config.py
+++ b/src/yandex_cloud_ml_sdk/_chat/completions/config.py
@@ -1,13 +1,15 @@
 from __future__ import annotations
 
+from copy import deepcopy
 from dataclasses import dataclass
 from enum import Enum
 from typing import Any, Union
 
-from typing_extensions import Self
+from typing_extensions import Self, TypeAlias
 
 from yandex_cloud_ml_sdk._models.completions.config import CompletionTool, GPTModelConfig
 from yandex_cloud_ml_sdk._tools.tool import BaseTool
+from yandex_cloud_ml_sdk._types.schemas import JsonObject
 from yandex_cloud_ml_sdk._utils.coerce import coerce_tuple
 
 
@@ -26,12 +28,14 @@ def _coerce(cls, value: ChatReasoningModeType) -> Self:
 
 
 ChatReasoningModeType = Union[str, ChatReasoningMode]
+QueryType: TypeAlias = JsonObject
 
 
 @dataclass(frozen=True)
 class ChatModelConfig(GPTModelConfig):
     reasoning_mode: ChatReasoningMode | None = None
     tools: tuple[CompletionTool, ...] | None = None
+    extra_query: QueryType | None = None
 
     def _replace(self, **kwargs: Any) -> Self:
         if reasoning_mode := kwargs.get('reasoning_mode'):
@@ -40,4 +44,9 @@ def _replace(self, **kwargs: Any) -> Self:
         if tools := kwargs.get('tools'):
             kwargs['tools'] = coerce_tuple(tools, BaseTool)  # type: ignore[type-abstract]
 
+        extra_query: QueryType | None
+        if extra_query := kwargs.get('extra_query'):
+            assert isinstance(extra_query, dict)
+            kwargs['extra_query'] = deepcopy(extra_query)
+
         return super()._replace(**kwargs)
diff --git a/src/yandex_cloud_ml_sdk/_chat/completions/model.py b/src/yandex_cloud_ml_sdk/_chat/completions/model.py
index 52582ffc..d4192b78 100644
--- a/src/yandex_cloud_ml_sdk/_chat/completions/model.py
+++ b/src/yandex_cloud_ml_sdk/_chat/completions/model.py
@@ -15,7 +15,7 @@
 from yandex_cloud_ml_sdk._types.tools.tool_choice import coerce_to_json as coerce_tool_choice_to_json
 from yandex_cloud_ml_sdk._utils.sync import run_sync, run_sync_generator
 
-from .config import ChatModelConfig, ChatReasoningModeType
+from .config import ChatModelConfig, ChatReasoningModeType, QueryType
 from .message import ChatMessageInputType, messages_to_json
 from .result import ChatModelResult
 
@@ -40,6 +40,7 @@ def configure(  # type: ignore[override]
         tools: UndefinedOr[Sequence[CompletionTool] | CompletionTool] = UNDEFINED,
         parallel_tool_calls: UndefinedOr[bool] = UNDEFINED,
         tool_choice: UndefinedOr[ToolChoiceType] = UNDEFINED,
+        extra_query: UndefinedOr[QueryType] = UNDEFINED,
     ) -> Self:
         return super().configure(
             temperature=temperature,
@@ -49,6 +50,7 @@ def configure(  # type: ignore[override]
             tools=tools,
             parallel_tool_calls=parallel_tool_calls,
             tool_choice=tool_choice,
+            extra_query=extra_query,
         )
 
     def _build_request_json(self, messages: ChatMessageInputType, stream: bool) -> dict[str, Any]:
@@ -85,6 +87,10 @@ def _build_request_json(self, messages: ChatMessageInputType, stream: bool) -> d
 
         if c.tool_choice is not None:
             result['tool_choice'] = coerce_tool_choice_to_json(c.tool_choice)
+
+        if c.extra_query is not None:
+            result.update(c.extra_query)
+
         return result
 
     @override
diff --git a/tests/chat/cassettes/test_completions/test_extra_query.yaml b/tests/chat/cassettes/test_completions/test_extra_query.yaml
new file mode 100644
index 00000000..9bcad66c
--- /dev/null
+++ b/tests/chat/cassettes/test_completions/test_extra_query.yaml
@@ -0,0 +1,92 @@
+interactions:
+- request:
+    body: '{"model":"gpt://b1ghsjum2v37c2un8h64/yandexgpt/latest","messages":[{"role":"user","content":"Say
+      random number from 0 to 10"}],"stream":false}'
+    headers:
+      accept:
+      - '*/*'
+      accept-encoding:
+      - gzip, deflate, zstd
+      connection:
+      - keep-alive
+      content-length:
+      - '142'
+      content-type:
+      - application/json
+      host:
+      - llm.api.cloud.yandex.net
+      user-agent:
+      - yandex-cloud-ml-sdk/0.15.0 python/3.12
+      x-client-request-id:
+      - e39a16aa-9ecc-4769-a220-d99a47e9997c
+    method: POST
+    uri: https://llm.api.cloud.yandex.net/v1/chat/completions
+  response:
+    body:
+      string: '{"id":"09afef25-7de1-4a86-8cda-1cb673f2ddc1","object":"chat.completion","created":1758116486,"model":"gpt://b1ghsjum2v37c2un8h64/yandexgpt/latest","choices":[{"index":0,"message":{"role":"assistant","content":"7"},"finish_reason":"stop"}],"usage":{"prompt_tokens":20,"total_tokens":22,"completion_tokens":2}}
+
+        '
+    headers:
+      content-length:
+      - '309'
+      content-type:
+      - application/json
+      date:
+      - Wed, 17 Sep 2025 13:41:26 GMT
+      server:
+      - ycalb
+      x-client-request-id:
+      - e39a16aa-9ecc-4769-a220-d99a47e9997c
+      x-request-id:
+      - c3402ee1-93c6-4c99-a660-f978ec004b35
+      x-server-trace-id:
+      - 990d344b241074c2:295875c4dbdaafe7:990d344b241074c2:1
+    status:
+      code: 200
+      message: OK
+- request:
+    body: '{"model":"gpt://b1ghsjum2v37c2un8h64/yandexgpt/latest","messages":[{"role":"user","content":"Say
+      random number from 0 to 10"}],"stream":false,"top_k":3}'
+    headers:
+      accept:
+      - '*/*'
+      accept-encoding:
+      - gzip, deflate, zstd
+      connection:
+      - keep-alive
+      content-length:
+      - '152'
+      content-type:
+      - application/json
+      host:
+      - llm.api.cloud.yandex.net
+      user-agent:
+      - yandex-cloud-ml-sdk/0.15.0 python/3.12
+      x-client-request-id:
+      - 5a710077-50b4-43ed-b269-78116ab15066
+    method: POST
+    uri: https://llm.api.cloud.yandex.net/v1/chat/completions
+  response:
+    body:
+      string: '{"id":"1ee562fa-00fa-4d56-84a5-4bcea60cd694","object":"chat.completion","created":1758116487,"model":"gpt://b1ghsjum2v37c2un8h64/yandexgpt/latest","choices":[{"index":0,"message":{"role":"assistant","content":"7"},"finish_reason":"stop"}],"usage":{"prompt_tokens":20,"total_tokens":22,"completion_tokens":2}}
+
+        '
+    headers:
+      content-length:
+      - '309'
+      content-type:
+      - application/json
+      date:
+      - Wed, 17 Sep 2025 13:41:27 GMT
+      server:
+      - ycalb
+      x-client-request-id:
+      - 5a710077-50b4-43ed-b269-78116ab15066
+      x-request-id:
+      - e3cb30bc-4cdb-4110-a4ba-90c9b2744aa9
+      x-server-trace-id:
+      - 16405981e4f1ec7d:64b3b33e662bcec:16405981e4f1ec7d:1
+    status:
+      code: 200
+      message: OK
+version: 1
diff --git a/tests/chat/test_completions.py b/tests/chat/test_completions.py
index 96483451..30a2fcc6 100644
--- a/tests/chat/test_completions.py
+++ b/tests/chat/test_completions.py
@@ -5,6 +5,7 @@
 import pathlib
 from typing import cast
 
+import httpx._client
 import pytest
 
 from yandex_cloud_ml_sdk import AsyncYCloudML
@@ -388,3 +389,27 @@ async def test_multimodal(async_sdk: AsyncYCloudML) -> None:
     ]
     result = await model.run(request)
     assert 'complex' in result.text
+
+
+async def test_extra_query(async_sdk: AsyncYCloudML, monkeypatch) -> None:
+    top_k = None
+
+    original = httpx._client.AsyncClient.request
+
+    async def patched_request(*args, **kwargs):
+        nonlocal top_k
+        top_k = kwargs.get('json', {}).get('top_k')
+        return await original(*args, **kwargs)
+
+    monkeypatch.setattr("httpx._client.AsyncClient.request", patched_request)
+
+    query = "Say random number from 0 to 10"
+
+    model = async_sdk.chat.completions('yandexgpt')
+
+    await model.run(query)
+    assert not top_k
+
+    model = model.configure(extra_query={'top_k': 3})
+    await model.run(query)
+    assert top_k == 3