feat: openai default model uses gpt-4o-mini (#1526)

embedchain/embedchain/llm/azure_openai.py

@@ -26,7 +26,7 @@ class AzureOpenAILlm(BaseLlm):
         chat = AzureChatOpenAI(
             deployment_name=config.deployment_name,
             openai_api_version=str(config.api_version) if config.api_version else "2024-02-01",
-            model_name=config.model or "gpt-3.5-turbo",
+            model_name=config.model or "gpt-4o-mini",
             temperature=config.temperature,
             max_tokens=config.max_tokens,
             streaming=config.stream,

embedchain/embedchain/llm/openai.py

@@ -52,7 +52,7 @@ class OpenAILlm(BaseLlm):
             messages.append(SystemMessage(content=config.system_prompt))
         messages.append(HumanMessage(content=prompt))
         kwargs = {
-            "model": config.model or "gpt-3.5-turbo",
+            "model": config.model or "gpt-4o-mini",
             "temperature": config.temperature,
             "max_tokens": config.max_tokens,
             "model_kwargs": config.model_kwargs or {},