Fix typos

Move model instantiation

api.py

@@ -50,8 +50,7 @@ async def create_item(request: Request):
 
 
 if __name__ == '__main__':
-    uvicorn.run(app, host='0.0.0.0', port=8000, workers=1)
-
     tokenizer = AutoTokenizer.from_pretrained("THUDM/chatglm-6b", trust_remote_code=True)
-model = AutoModel.from_pretrained("THUDM/chatglm_6b", trust_remote_code=True).half().cuda()
+    model = AutoModel.from_pretrained("THUDM/chatglm-6b", trust_remote_code=True).half().cuda()
     model.eval()
+    uvicorn.run(app, host='0.0.0.0', port=8000, workers=1)