OpenAI just released 03-mini to fight DeepSeek — the first 'reasoning model' that's free in ChatGPT
The o3-mini model can be used on the free tier of ChatGPT by selecting the "Reason" feature in ChatGPT, with rate limits similar to GPT-4o. Additionally, OpenAI has increased message limits for Plus and Teams users, while Pro users, at a subscription rate of $200 per month, enjoy unlimited access.