GPT‑5.4 (as GPT‑5.4 Thinking) is available today in ChatGPT, Codex, and the API. It’s our most advanced model, ideal for financial reasoning and Excel-based modeling. We’ve worked closely with industry practitioners to improve GPT‑5.4 on real-world finance workflows that often take analysts hours or days to complete, including financial modeling, scenario analysis, data extraction, and long-form research. The result is stronger performance on the tasks finance professionals rely on every day.

On OpenAI’s internal investment banking benchmark, which evaluates real-world workflows such as building a three-statement model with proper formatting and citations, performance improved from 43.7% with GPT‑5 to 87.3% with GPT‑5.4 Thinking.

We’re introducing ChatGPT for Excel in beta—a version of ChatGPT embedded directly in spreadsheets that can build, analyze, and update models using the same formulas and structures teams already rely on. Analysts, strategists, researchers, and accountants can move faster, reduce manual work, and focus on judgment and decision-making instead of writing formulas, tracing links, and fixing models.

We are improving ChatGPT for Excel quickly based on user feedback. Some responses may take longer as we optimize performance, and generated outputs may occasionally require cleanup or adjustment to match preferred spreadsheet formatting or layout conventions. ChatGPT can generate and explain formulas, but complex formulas or edge cases may still require manual refinement.