feat: Update new models

Author: ayush6624

chat.go

@@ -12,12 +12,26 @@ import (
 type ChatGPTModel string
 
 const (
-	GPT35Turbo     ChatGPTModel = "gpt-3.5-turbo"
-	GPT35Turbo0301 ChatGPTModel = "gpt-3.5-turbo-0301"
-	GPT4           ChatGPTModel = "gpt-4"
-	GPT4_0314      ChatGPTModel = "gpt-4-0314"
-	GPT4_32k       ChatGPTModel = "gpt-4-32k"
-	GPT4_32k_0314  ChatGPTModel = "gpt-4-32k-0314"
+	GPT35Turbo        ChatGPTModel = "gpt-3.5-turbo"
+
+	// Deprecated: Use gpt-3.5-turbo-0613 instead, model will discontinue on 09/13/2023
+	GPT35Turbo0301    ChatGPTModel = "gpt-3.5-turbo-0301"
+	
+	GPT35Turbo0613    ChatGPTModel = "gpt-3.5-turbo-0613"
+	GPT35Turbo16k     ChatGPTModel = "gpt-3.5-turbo-16k"
+	GPT35Turbo16k0613 ChatGPTModel = "gpt-3.5-turbo-16k-0613"
+	GPT4              ChatGPTModel = "gpt-4"
+	
+	// Deprecated: Use gpt-4-0613 instead, model will discontinue on 09/13/2023
+	GPT4_0314         ChatGPTModel = "gpt-4-0314"
+	
+	GPT4_0613         ChatGPTModel = "gpt-4-0613"
+	GPT4_32k          ChatGPTModel = "gpt-4-32k"
+	
+	// Deprecated: Use gpt-4-32k-0613 instead, model will discontinue on 09/13/2023
+	GPT4_32k_0314     ChatGPTModel = "gpt-4-32k-0314"
+	
+	GPT4_32k_0613     ChatGPTModel = "gpt-4-32k-0613"
 )
 
 type ChatGPTModelRole string
@@ -143,8 +157,14 @@ func validate(req *ChatCompletionRequest) error {
 		return chatgpt_errors.ErrNoMessages
 	}
 
-	if req.Model != GPT35Turbo && req.Model != GPT35Turbo0301 && req.Model != GPT4 && req.Model != GPT4_0314 && req.Model != GPT4_32k && req.Model != GPT4_32k_0314 {
-		return chatgpt_errors.ErrInvalidModel
+	allowedModels := []ChatGPTModel{
+		GPT35Turbo, GPT35Turbo0301, GPT35Turbo0613, GPT35Turbo16k, GPT35Turbo16k0613, GPT4, GPT4_0314, GPT4_0613, GPT4_32k, GPT4_32k_0314, GPT4_32k_0613,
+	}
+
+	for _, model := range allowedModels {
+		if req.Model != model {
+			return chatgpt_errors.ErrInvalidModel
+		}
 	}
 
 	for _, message := range req.Messages {