New GPT-5.4 model to feature “extreme” reasoning

OpenAI has indicated that a new version of its large language model, GPT-5.4, is in development following a post on social media platform X. 5.4 sooner than you Think. — OpenAI (@OpenAI) March 3, 2026 The upcoming model is anticipated to feature an “extreme” reasoning mode, which would allow it to dedicate more computational resources […]