diff --git a/aidial_client/resources/chat/completions.py b/aidial_client/resources/chat/completions.py
index 614c8d2..374b3a6 100644
--- a/aidial_client/resources/chat/completions.py
+++ b/aidial_client/resources/chat/completions.py
@@ -29,7 +29,6 @@
 )
 from aidial_client.resources.base import AsyncResource, Resource
 from aidial_client.types.chat import (
-    Addon,
     ChatCompletionChunk,
     ChatCompletionResponse,
     FunctionCallSpecParam,
@@ -62,7 +61,6 @@ def create(
         tool_choice: Union[
             Union[Literal["none", "auto"], ToolCallSpecParam], None
         ] = None,
-        addons: Union[Addon, None] = None,
         temperature: Union[float, None] = None,
         top_p: Union[float, None] = None,
         n: Union[int, None] = None,
@@ -100,7 +98,6 @@ def create(
         tool_choice: Union[
             Union[Literal["none", "auto"], ToolCallSpecParam], None
         ] = None,
-        addons: Union[Addon, None] = None,
         temperature: Union[float, None] = None,
         top_p: Union[float, None] = None,
         n: Union[int, None] = None,
@@ -137,7 +134,6 @@ def create(
         tool_choice: Union[
             Union[Literal["none", "auto"], ToolCallSpecParam], None
         ] = None,
-        addons: Union[Addon, None] = None,
         temperature: Union[float, None] = None,
         top_p: Union[float, None] = None,
         n: Union[int, None] = None,
@@ -182,7 +178,6 @@ def create(
                 "tools": tools,
                 "top_p": top_p,
                 "user": user,
-                "addons": addons,
                 "max_prompt_tokens": max_prompt_tokens,
                 "custom_fields": custom_fields,
                 "logprobs": logprobs,
@@ -242,7 +237,6 @@ async def create(
         tool_choice: Union[
             Union[Literal["none", "auto"], ToolCallSpecParam], None
         ] = None,
-        addons: Union[Addon, None] = None,
         temperature: Union[float, None] = None,
         top_p: Union[float, None] = None,
         n: Union[int, None] = None,
@@ -278,7 +272,6 @@ async def create(
         tool_choice: Union[
             Union[Literal["none", "auto"], ToolCallSpecParam], None
         ] = None,
-        addons: Union[Addon, None] = None,
         temperature: Union[float, None] = None,
         top_p: Union[float, None] = None,
         n: Union[int, None] = None,
@@ -315,7 +308,6 @@ async def create(
         tool_choice: Union[
             Union[Literal["none", "auto"], ToolCallSpecParam], None
         ] = None,
-        addons: Union[Addon, None] = None,
         temperature: Union[float, None] = None,
         top_p: Union[float, None] = None,
         n: Union[int, None] = None,
@@ -359,7 +351,6 @@ async def create(
                 "tools": tools,
                 "top_p": top_p,
                 "user": user,
-                "addons": addons,
                 "max_prompt_tokens": max_prompt_tokens,
                 "custom_fields": custom_fields,
                 "logprobs": logprobs,
diff --git a/aidial_client/types/chat/__init__.py b/aidial_client/types/chat/__init__.py
index 7e5b4a2..e4adccc 100644
--- a/aidial_client/types/chat/__init__.py
+++ b/aidial_client/types/chat/__init__.py
@@ -1,4 +1,3 @@
-from .addon import Addon, ExternalAddon, SystemAddon
 from .function import FunctionCallSpecParam, FunctionParam
 from .request import ChatCompletionRequest
 from .request_param import (
@@ -13,9 +12,6 @@
 
 __all__ = [
     "ChatCompletionRequest",
-    "Addon",
-    "SystemAddon",
-    "ExternalAddon",
     "FunctionParam",
     "FunctionCallSpecParam",
     "ToolParam",
diff --git a/aidial_client/types/chat/addon.py b/aidial_client/types/chat/addon.py
deleted file mode 100644
index d59334b..0000000
--- a/aidial_client/types/chat/addon.py
+++ /dev/null
@@ -1,17 +0,0 @@
-from typing import Union
-
-from typing_extensions import TypedDict
-
-
-class ExternalAddon(TypedDict):
-    # The URL for accessing the OpenAI Plugin Schema.
-    # The system object used for converting the Addon name to the Addon link.
-    url: str
-
-
-class SystemAddon(TypedDict):
-    # The name of the system Addon.
-    name: str
-
-
-Addon = Union[ExternalAddon, SystemAddon]
diff --git a/aidial_client/types/chat/legacy/chat_completion.py b/aidial_client/types/chat/legacy/chat_completion.py
index d91b7ec..2eec289 100644
--- a/aidial_client/types/chat/legacy/chat_completion.py
+++ b/aidial_client/types/chat/legacy/chat_completion.py
@@ -79,11 +79,6 @@ class Message(ExtraForbidModel):
     function_call: Optional[FunctionCall] = None
 
 
-class Addon(ExtraForbidModel):
-    name: Optional[StrictStr] = None
-    url: Optional[StrictStr] = None
-
-
 class Function(ExtraForbidModel):
     name: StrictStr
     description: Optional[StrictStr] = None
@@ -163,6 +158,5 @@ class ChatCompletionRequestCustomFields(ExtraForbidModel):
 
 
 class ChatCompletionRequest(AzureChatCompletionRequest):
-    addons: Optional[List[Addon]] = None
     max_prompt_tokens: Optional[PositiveInt] = None
     custom_fields: Optional[ChatCompletionRequestCustomFields] = None
diff --git a/aidial_client/types/chat/request.py b/aidial_client/types/chat/request.py
index 4820f88..1282540 100644
--- a/aidial_client/types/chat/request.py
+++ b/aidial_client/types/chat/request.py
@@ -2,7 +2,6 @@
 
 from typing_extensions import TypedDict
 
-from aidial_client.types.chat.addon import Addon
 from aidial_client.types.chat.function import (
     FunctionCallSpecParam,
     FunctionParam,
@@ -39,6 +38,5 @@ class ChatCompletionRequest(TypedDict, total=False):
     function_call: Optional[
         Union[Literal["none", "auto"], FunctionCallSpecParam]
     ]
-    addons: Optional[Addon]
     max_prompt_tokens: Optional[Union[Literal["infinity"], int]]
     custom_fields: Optional[ChatCompletionRequestCustomFields]