Is ChatGPT no longer free?

Could you clarify, is there a change in the pricing structure for ChatGPT, and is it no longer offered as a free service? If so, what are the new costs associated with using ChatGPT, and what are the benefits or advantages of continuing to use the platform despite the change in pricing? Additionally, are there any alternatives or similar services that remain free, or that offer a more cost-effective option for those looking for similar functionality?