OpenAI Launches ChatGPT for Excel Powered by GPT-5.4

San Francisco: OpenAI has launched ChatGPT for Excel in beta, an add-in that embeds the company’s latest AI model directly inside Microsoft workbooks. Powered by GPT-5.4 Thinking, the tool lets users build financial models, run scenario analysis, trace formula errors, and generate structured outputs using plain language without leaving Excel.

The beta is rolling out now to ChatGPT Plus, Pro, Team, Business, Enterprise, and Edu subscribers in the United States, Canada, and Australia. Support for Google Sheets is confirmed as coming soon.

The launch coincides with OpenAI’s release of GPT-5.4, which the company describes as its most capable and efficient frontier model for professional work. The model comes in two variants: GPT-5.4 Thinking, available to all paid ChatGPT subscribers, and GPT-5.4 Pro, reserved for Pro and Enterprise plan users requiring maximum reasoning depth.

On OpenAI’s internal spreadsheet modeling benchmark designed around tasks a junior investment banking analyst would perform GPT-5.4 scored 87.3%, up sharply from 68.4% for GPT-5.2. Across general tasks, the model produces 18% fewer errors and individual claims are 33% less likely to be false compared to its predecessor.

The Excel add-in is designed with auditability at its core. Before modifying any cell or formula, the tool asks for user confirmation. It explains its reasoning by linking outputs directly to the cells it references, allowing teams to trace exactly how assumptions flow through a model. For enterprise customers concerned about data privacy, OpenAI confirmed that data shared within ChatGPT Enterprise is not used to train or improve its models.

Alongside the Excel launch, OpenAI introduced new financial data integrations inside ChatGPT connecting the platform directly to Moody’s, Dow Jones Factiva, MSCI, Third Bridge, MT Newswire, and LSEG, with FactSet coming soon. The integrations allow users to pull institutional-grade market data, filings, and research reports into a single workflow reducing the need to switch between tools during analysis or due diligence.

GPT-5.4 also introduces native computer-use capabilities in Codex and the API, making it OpenAI’s first general-purpose model able to operate software environments autonomously across multi-step workflows. It supports up to one million tokens of context in the API, up from 400,000 tokens on GPT-5 and GPT-5.3-Codex.

The release puts OpenAI in more direct competition with Anthropic’s Claude for Financial Services and Google’s Gemini integrations across Workspace both of which have been pushing aggressively into enterprise productivity workflows over the past year.