ChatGPT adds ads, swaps fallback

OpenAI has begun showing ads inside ChatGPT for Free and Go users in Australia, New Zealand and Canada, expanding a test it first launched in the United States on February 9, 2026. (help.openai.com, help.openai.com) The company’s April 16, 2026 release notes say Pro, Business, Enterprise and Education accounts remain ad-free. OpenAI’s ads FAQ uses “Edu” for the education tier and says users under 18 will not be shown ads during the test. (help.openai.com, help.openai.com) OpenAI also changed what happens when users run through their fast-message allowance. On April 9, 2026, ChatGPT replaced GPT-5 Instant Mini with GPT-5.3 Instant Mini as the fallback model after users hit rate limits for GPT-5.3 Instant. (help.openai.com) That fallback model does not appear in the model picker because it is only used after a limit is reached, according to the same release notes. OpenAI says GPT-5.3 Instant Mini is more natural in conversation and stronger on writing and context than the older GPT-5 Instant Mini. (help.openai.com) The two changes land as OpenAI keeps compressing ChatGPT’s model lineup into automatic routing instead of long menus of named models. A separate help article says GPT-5.3 is now the default for logged-in users, while GPT-4o was fully retired across ChatGPT plans after April 3, 2026. (help.openai.com, help.openai.com) OpenAI’s ads FAQ says the company is testing advertising because ChatGPT serves “hundreds of millions” of users and the Free and Go plans require ongoing infrastructure spending. The company also says ads run on separate systems and do not influence chat answers. (help.openai.com) The pricing split is getting sharper at the same time. OpenAI’s April 9 release notes introduced a new $100-a-month Pro option, while a separate pricing page describes Plus at $20 a month and Pro as a higher-usage tier for heavier work. (help.openai.com, help.openai.com) For users on the free end of ChatGPT, the product is now changing in two visible ways at once: ads may appear in some countries, and the backup model after limits are hit is being upgraded behind the scenes. For paying workplace and school customers, OpenAI is still drawing a clean line around an ad-free experience. (help.openai.com, help.openai.com)