It's truly frustrating to hear such use of anthropomorphizing terminology.
AI models do not lie, nor do they tell the truth. They synthesize character or pixel data according to complex algorithms and datasets running on silicon hardware. It's up to us humans to use our decidedly non-computer minds to interpret that output data as something which means either truth or falsehood (which itself is a whole separate debate over how we can know what is true, etc.).
If you take a deep dive into it, there isn't really any truth or falsehoods, it mostly comes down to what can be reproduced, and what is practical or pragmatic for the situation.
AI models do not lie, nor do they tell the truth. They synthesize character or pixel data according to complex algorithms and datasets running on silicon hardware. It's up to us humans to use our decidedly non-computer minds to interpret that output data as something which means either truth or falsehood (which itself is a whole separate debate over how we can know what is true, etc.).