I couldn't able use the GPT4 using my API Key

Hi, I added the Rate limit to GPT4 model, But still I got the below error. Please guide us with this integration

Error code: 403 - {‘error’: {‘message’: ‘Project proj_******************7fv does not have access to model gpt-4’, ‘type’: ‘invalid_request_error’, ‘param’: None, ‘code’: ‘model_not_found’}}",
“errorType”: “PermissionDeniedError”,

Are you using free tier?

No @allyssonallan , I am using Tier 1.