diff --git a/extensions/openai/completions.py b/extensions/openai/completions.py
index 9ea6b232..40a4cab6 100644
--- a/extensions/openai/completions.py
+++ b/extensions/openai/completions.py
@@ -204,8 +204,9 @@ def chat_completions_common(body: dict, is_legacy: bool = False, stream=False) -
     name1_instruct, name2_instruct, _, _, context_instruct, turn_template, system_message = load_character_memoized(instruction_template, '', '', instruct=True)
     name1_instruct = body['name1_instruct'] or name1_instruct
     name2_instruct = body['name2_instruct'] or name2_instruct
-    context_instruct = body['context_instruct'] or context_instruct
     turn_template = body['turn_template'] or turn_template
+    context_instruct = body['context_instruct'] or context_instruct
+    system_message = body['system_message'] or system_message
 
     # Chat character
     character = body['character'] or shared.settings['character']
diff --git a/extensions/openai/embeddings.py b/extensions/openai/embeddings.py
index a5b52d7b..396a3476 100644
--- a/extensions/openai/embeddings.py
+++ b/extensions/openai/embeddings.py
@@ -3,9 +3,8 @@ import os
 import numpy as np
 from extensions.openai.errors import ServiceUnavailableError
 from extensions.openai.utils import debug_msg, float_list_to_base64
-from transformers import AutoModel
-
 from modules import shared
+from transformers import AutoModel
 
 embeddings_params_initialized = False
 
diff --git a/extensions/openai/typing.py b/extensions/openai/typing.py
index e03358d8..afd57eab 100644
--- a/extensions/openai/typing.py
+++ b/extensions/openai/typing.py
@@ -42,7 +42,7 @@ class GenerationOptions(BaseModel):
 
 
 class CompletionRequestParams(BaseModel):
-    model: str | None = None
+    model: str | None = Field(default=None, description="Unused parameter. To change the model, use the /v1/internal/model/load endpoint.")
     prompt: str | List[str]
     best_of: int | None = Field(default=1, description="Unused parameter.")
     echo: bool | None = False
@@ -75,7 +75,7 @@ class CompletionResponse(BaseModel):
 
 class ChatCompletionRequestParams(BaseModel):
     messages: List[dict]
-    model: str | None = None
+    model: str | None = Field(default=None, description="Unused parameter. To change the model, use the /v1/internal/model/load endpoint.")
     frequency_penalty: float | None = 0
     function_call: str | dict | None = Field(default=None, description="Unused parameter.")
     functions: List[dict] | None = Field(default=None, description="Unused parameter.")
@@ -92,10 +92,11 @@ class ChatCompletionRequestParams(BaseModel):
     mode: str = Field(default='instruct', description="Valid options: instruct, chat, chat-instruct.")
 
     instruction_template: str | None = Field(default=None, description="An instruction template defined under text-generation-webui/instruction-templates. If not set, the correct template will be guessed using the regex expressions in models/config.yaml.")
+    turn_template: str | None = Field(default=None, description="Overwrites the value set by instruction_template.")
     name1_instruct: str | None = Field(default=None, description="Overwrites the value set by instruction_template.")
     name2_instruct: str | None = Field(default=None, description="Overwrites the value set by instruction_template.")
     context_instruct: str | None = Field(default=None, description="Overwrites the value set by instruction_template.")
-    turn_template: str | None = Field(default=None, description="Overwrites the value set by instruction_template.")
+    system_message: str | None = Field(default=None, description="Overwrites the value set by instruction_template.")
 
     character: str | None = Field(default=None, description="A character defined under text-generation-webui/characters. If not set, the default \"Assistant\" character will be used.")
     name1: str | None = Field(default=None, description="Overwrites the value set by character.")