DeepSeek stunned the tech world with the release of its R1 "reasoning" model, matching or exceeding OpenAI's reasoning model for a fraction of the cost.

KEY TAKEAWAYS OpenAI said Wednesday that it is probing whether Chinese artificial intelligence startup DeepSeek improperly used its data to launch the low-cost model that spooked markets Monday.The comment by OpenAI follows a Bloomberg report that both OpenAI and its biggest backer Microsoft are investigating DeepSeek's model.

OpenAI says it has uncovered evidence that Chinese AI startup DeepSeek used its proprietary models to train a competing open-source

NVIDIA, the world's most valuable company until Monday, lost $600 billion of market value in a single day, the biggest in US stock history.

President Donald Trump said DeepSeek’s AI advances should be a “wake-up call” for the U.S.

Chinese startup DeepSeek has achieved what many (including experts) thought impossible: create a foundational, competitive AI model for just $5.6 million. By comparison, OpenAI’s unreleased GPT-5 (codenamed “Orion”) reportedly requires $500 million for six months of training.