I'm interested in using OpenAI's API for my project, but I need to understand the cost structure before diving in. Specifically, how much does an API key cost? Does the pricing depend on the language model I choose, or are there flat fees? pen_spark

I’m considering upgrading my OpenAI account type, but I’m unsure how it affects pricing. Since my main concern is cost, I’d like a clear picture of the pricing structure before making the switch. Does upgrading simply unlock new features without changing the per-token cost for language models like GPT-3.5? If so, understanding the current pricing would be helpful. For example, what are the current rates for input and output tokens for different models, especially the more powerful ones like gpt-3.5-turbo? Knowing this will allow me to estimate my potential expenses and determine if the upgrade aligns with my budget.