Resolving OpenAI API Tier Limit Issues for GPT-4o Case Study Research

Hi, I'm getting this error message when running a web research prompt (we are searching websites for case studies) : This action may run slowly because the limits you have on your account associated with this model are low. Consider upgrading your OpenAI API key to a higher tier for faster performance. We are trying to run with our gpt-4o Tier 2 and get zero results. Do you know what tier we need to be at to not get this error?