Added GPT-4-vision

pages/api/chat.ts

@@ -41,7 +41,7 @@ const handler = async (req: Request): Promise<Response> => {
 
     for (let i = messages.length - 1; i >= 0; i--) {
       const message = messages[i];
-      const tokens = encoding.encode(message.content);
+      const tokens = encoding.encode(message.content[0].text ?? "");
 
       if (tokenCount + tokens.length + 1000 > model.tokenLimit) {
         break;
@@ -55,6 +55,7 @@ const handler = async (req: Request): Promise<Response> => {
     const stream = await OpenAIStream(model, promptToSend, temperatureToUse, key, messagesToSend);
 
     var resp = new Response(stream);
+    return resp;
 
     // let proxy services like nginx or argo tunnel know about pass the chunk immediately
     // similar to nginx option `proxy_buffering off;`