OpenAI said on April 17 that ChatGPT will support HWP and HWPX files, the Hangul document formats used by Hancom Office. The move is seen as aimed at targeting South Korea's corporate market, including financial firms and public institutions, beyond a simple improvement in user convenience.

With the update, users in South Korea can upload Hangul documents directly to ChatGPT without converting files to check and analyse content. They can also extract needed information or summarise key points through natural-language questions and answers. It is expected to be useful in workplaces that need to quickly review large volumes of documents such as lengthy reports, administrative papers and meeting materials.

HWP and HWPX are used as standard document formats across South Korean public institutions, educational bodies and major companies. As they account for more than 91 percent of domestic public documents, support for the formats has been a key variable determining whether global AI services can enter South Korea's corporate market.

OpenAI also took the position that the update considers the corporate market. An OpenAI Korea official said, "Primarily we considered Korean users, but corporate sales also aligns with our direction."

OpenAI is not the first to support HWP. Google implemented HWP parsing in 'Gemini 3' released late last year. Google Cloud is bundling Gemini into its Workspace Enterprise plan, automatically converting existing corporate customers into AI users.

Anthropic, the developer of Claude, does not yet support HWP files.