Responses API now has expanded file input types: docx, pptx, csv, xlsx
OpenAI Developer Community
February 24, 2026
In addition to the new file types, there’s specific file types augmentation for data (xlsx, csv, etc):
Instead of passing entire sheets to the model, the API parses up to the first 1,000 rows per sheet and adds model-generated summary and header metadata so the model can work from a smaller, structured view of the data.
| Category | Common extensions |
|---|---|
| PDF files | |
| Text and code | .txt, .md, .json, .html, .xml, code files |
| Rich documents | .doc, .docx, .rtf, .odt |
| Presentations | .ppt, .pptx |
| Spreadsheets | .csv, .xls, .xlsx |
Read more:
developers.openai.com
File inputs | OpenAI API
Learn how to use files as file inputs in the OpenAI API.
x.com
OpenAI Developers
@OpenAIDevs
We expanded file input types so you can now pass docx, pptx, csv, xlsx, and more directly to the Responses API. Your agents can now pull context from real-world files and generate more accurate outputs. developers.openai.com/api/docs/guide… pic.x.com/no5zPgWgSv
10:15 PM - 24 Feb 2026 78 5
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