OpenAI has released GPT-5.4, positioning it as its most capable model for professional work. The update focuses on productivity tasks, delivering a notable jump in spreadsheet accuracy and speed, an Excel sidebar add‑on, and stronger presentation output. Human reviewers reported fewer errors and false claims, while token efficiency improvements enable longer, more complex workflows. The model is available to Pro and Enterprise users through ChatGPT and the API, with distinct pricing tiers for standard and Pro versions. Read more →