ChatGPT Plus is officially listed at $20 per month, but the actual cost often...

https://domgodwinson38.gumroad.com/p/why-do-reviews-only-mention-the-160-messages-cap-and-not-the-reasoning-cap

ChatGPT Plus is officially listed at $20 per month, but the actual cost often ranges between $13 and $27 depending on where you subscribe. This difference is mainly due to local taxes like VAT or GST and additional fees charged by app stores