ChatGPT 5.4 Pro user reports $80 charge for single 'Hi' message
A user on Hacker News reported being charged $80 for sending a single 'Hi' message to ChatGPT 5.4 Pro. The post, which received 1 point and 0 comments, highlighted a potential billing anomaly in OpenAI's latest Pro tier. This incident raises immediate concerns about cost transparency and billing reliability for premium AI services.