Feat: Add GPT-5.2 & pro (#11929)

### What problem does this PR solve?

Feat: Add GPT-5.2 & pro

### Type of change

- [x] New Feature (non-breaking change which adds functionality)

conf/llm_factories.json

@@ -7,6 +7,20 @@
             "status": "1",
             "rank": "999",
             "llm": [
+                {
+                    "llm_name": "gpt-5.2-pro",
+                    "tags": "LLM,CHAT,400k,IMAGE2TEXT",
+                    "max_tokens": 400000,
+                    "model_type": "chat",
+                    "is_tools": true
+                },
+                {
+                    "llm_name": "gpt-5.2",
+                    "tags": "LLM,CHAT,400k,IMAGE2TEXT",
+                    "max_tokens": 400000,
+                    "model_type": "chat",
+                    "is_tools": true
+                },
                 {
                     "llm_name": "gpt-5.1",
                     "tags": "LLM,CHAT,400k,IMAGE2TEXT",

rag/llm/__init__.py

@@ -54,6 +54,7 @@ class SupportedLiteLLMProvider(StrEnum):
     MiniMax = "MiniMax"
     DeerAPI = "DeerAPI"
     GPUStack = "GPUStack"
+    OpenAI = "OpenAI"
 
 
 FACTORY_DEFAULT_BASE_URL = {
@@ -78,6 +79,7 @@ FACTORY_DEFAULT_BASE_URL = {
     SupportedLiteLLMProvider.ZHIPU_AI: "https://open.bigmodel.cn/api/paas/v4",
     SupportedLiteLLMProvider.MiniMax: "https://api.minimaxi.com/v1",
     SupportedLiteLLMProvider.DeerAPI: "https://api.deerapi.com/v1",
+    SupportedLiteLLMProvider.OpenAI: "https://api.openai.com/v1",
 }
 
 
@@ -113,6 +115,8 @@ LITELLM_PROVIDER_PREFIX = {
     SupportedLiteLLMProvider.MiniMax: "openai/",
     SupportedLiteLLMProvider.DeerAPI: "openai/",
     SupportedLiteLLMProvider.GPUStack: "openai/",
+    SupportedLiteLLMProvider.OpenAI: "openai/",
+
 }
 
 ChatModel = globals().get("ChatModel", {})

rag/llm/chat_model.py

@@ -487,15 +487,6 @@ class Base(ABC):
         assert False, "Shouldn't be here."
 
 
-class GptTurbo(Base):
-    _FACTORY_NAME = "OpenAI"
-
-    def __init__(self, key, model_name="gpt-3.5-turbo", base_url="https://api.openai.com/v1", **kwargs):
-        if not base_url:
-            base_url = "https://api.openai.com/v1"
-        super().__init__(key, model_name, base_url, **kwargs)
-
-
 class XinferenceChat(Base):
     _FACTORY_NAME = "Xinference"
 
@@ -1227,6 +1218,7 @@ class LiteLLMBase(ABC):
         "MiniMax",
         "DeerAPI",
         "GPUStack",
+        "OpenAI",
     ]
 
     def __init__(self, key, model_name, base_url=None, **kwargs):