Great news: OpenAI has increased O3 limits for Plus users.
Although the $20 subscription still does not include access to O3-pro, after the standard plan prices were lowered, the limits on regular O3 have doubled. Now, instead of 100 requests per day, users can send 200 — which is nearly enough for all tasks.
By the way, exactly five years have passed since the launch of the OpenAI API. It was introduced on June 11, 2020, right after GPT-3 was released.