As of July 2026, ChatGPT offers a Free plan using GPT-5.6 Terra, which is great...

https://garrettwigp625.tearosediner.net/what-is-the-difference-between-gpt-5-5-and-gpt-5-6-for-pricing

As of July 2026, ChatGPT offers a Free plan using GPT-5.6 Terra, which is great for casual use. The Go plan costs $8 per month and also runs GPT-5.6 Terra, giving you faster responses and priority access