I created new account on Open AI and it shows free $5 limit and using it for testing but it is respponding with 429 status error do I have to pay first to test or is it error from my code?

I am using OpenAI’s assisstant API to make a bot, but the prompt_token_usage in usage is too high.

I am trying to build an assistant with openAI. Everything is complete but when I am trying to make a conversation its showing an error.