GPTs and free tier limits

Hey everyone!

I created a custom GPT for language learners. I shared it with a free chatgpt account using public link. I used iOS app to talk with my custom GPT. using voice mode. After several messages, I reached 4o limit, but I am not able to continue to chat (using text or voice) with my custom GPT. Chat returns error: “You’ve reached your limit for using GPTs”.

I disabled all the additional GPT features like browsing/dall-e/code interpreter, but I still can’t talk with my custom GPTs.

Does it mean GPTs are limited for free users? Is it possible to switch to 3.5 in my custom GPT to provide higher limits/remove them?