OpenAI Gives Everyone Free Access to GPT-5.4 Mini Reasoning

TL;DR: OpenAI launched GPT-5.4 mini and nano, making the mini variant available to all free ChatGPT users via the 'Thinking' toggle. GPT-5.4 mini delivers improved coding and reasoning capabilities that closely approach the flagship GPT-5.4 model. For paid users, it serves as the automatic fallback once rate limits are hit on the full model.

Why it matters: OpenAI democratizing frontier-tier reasoning for free users accelerates adoption and raises the bar for what users now expect from 'free' AI tools.

Source: Engadget