How much does ChatGPT-4 cost?

Excuse me, could you please elaborate on the pricing structure for ChatGPT-4? I'm particularly interested in understanding the cost implications for businesses and individuals who might be considering adopting this technology. Is there a one-time fee, or is it subscription-based? Are there any hidden costs or additional charges that users should be aware of? I'm eager to get a clear picture of the financial commitment involved before making a decision.