• OpenAI has begun testing advertisements in ChatGPT for free users.
• The test is being conducted for Free and Go subscriptions (currently limited, for example in the USA).
• Paid tiers (Plus, Pro, Enterprise) remain ad-free.
• The company claims that ads do not affect the model's responses, and user conversations are not shared with advertisers.
The reason is the high cost of AI infrastructure and the need for additional monetization with a huge user base.