What is your goal?
Generate a structured response in JSON from a DOCX
What is the problem & what have you tried?
OpenAI “Generate a Response” with “file prompt” does not support .docx anymore? It was working well till Mars 16 2026 and today, march 19, it fails stating DOCX is not supported anymore.
Error messages or input/output bundles
[400] input: Invalid input: Expected context stuffing file type to be a supported format: .bat, .c, .css, .csv, .doc, .dot, .eml, .h, .htm, .html, .hwp, .hwpx, .js, .json, .ksh, .markdown, .md, .mht, .mhtml, .mjs, .nws, .pdf, .pl, .pot, .ppa, .pps, .ppt, .pwz, .py, .rst, .srt, .svg, .txt, .vcf, .vtt, .wiz, .xlb, .xls, .xml but got .docx.