OpenAI launches GPT-5.4 with Pro and Thinking versions

OpenAI launched GPT-5.4 on Thursday, featuring a standard version, a reasoning model (Thinking), and a high-performance variant (Pro). The API boasts a massive 1 million token context window, the largest ever from OpenAI.

This model is 33% less likely to make errors compared to its predecessor, enhancing reliability for professionals. It excels in creating complex deliverables like slide decks and financial models, making it a top choice for industries like law and finance.