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 recently held an Ask Me Anything (AMA) session on Reddit, addressing important issues, including its $500 billion bet on Stargate, AGI, cost-effective competition from DeepSeek, and open-source strategy.