In contrast with OpenAI, which follows a closed model, DeepSeek’s AI model discloses its full chain of reasoning in an open source model. Altman called DeepSeek’s R1 model “impressive” during a short thread on X.com early last week.

OpenAI said on Tuesday it will develop artificial intelligence products for South Korea with chat app operator Kakao, unveiling a second major alliance with a high-profile Asian partner this week. Julian Satterthwaite reports.

OpenAI chief Sam Altman signed a deal with tech giant Kakao in South Korea on Tuesday as the US firm seeks new alliances after Chinese rival DeepSeek shook the global