Your editorialized headline is false, misleading and technically not possible with only api access.
The outlet’s sources said Microsoft security researchers detected that large amounts of data were being exfiltrated through OpenAI developer accounts in late 2024, which the company believes are affiliated with DeepSeek. OpenAI told the Financial Times that it found evidence linking DeepSeek to the use of distillation (...)
In fact, it is exactly the point of the article that more access was used than is provided in the API. Distillation is not possible with API access.