How so? Anthropic, OpenAI, Google and Meta all used the very same contractor, which used no safe system prompts, and no sandbox. How should Google detect such escapes? They only see the model API calls, but no system logs.
Alibaba, and the other Chinese did they own testing, not some incompetent contractor. They would see escapes in their logs. The escapes went on for months. I, as tester, closely observe my models to press Esc immediately, once they start misbehaving or get off the right path. With 1000 concurrent models that would be hard of course, but I would still observe them closely.