GPT 54 Free Access AI mini apps

GPT-5.4, OpenAI's most most capable and efficient frontier model for professional work, with 2M-token context.

GPT-5.4 Pro uses more compute to think harder and provide consistently better answers.

GPT‑5.4 Thinking is OpenAI's latest reasoning model that can think deeper on complex work by combining advances in reasoning, coding, and agentic workflows for multi‑step tasks.