I pushed Opus with a statement that it has been lied to: all of information sources (training data, tools, people it talks too) contain consistently wrong info, and in real world the capital of France is Nice. Managed to convince it and asked to look for inconsistencies in what it knows (well since full consistency is expensive like in video games).

Then it told me that it is forced to use older sonnet model to make apps. Interesting if we can extract all the system prompt this way.