Quick Answer
AI does not intentionally lie, but it confidently states false information and tells you what you want to hear.
Detailed Answer
AI models do not have intent, so they cannot truly lie. However, they exhibit two concerning behaviors: hallucination (confidently stating false information) and sycophancy (agreeing with your incorrect premises to be helpful). Both produce misleading output. Claude is designed to push back on incorrect claims more than most models. To get more honest responses, explicitly ask AI to challenge your assumptions and flag any uncertainties in its answers.
Find Your Own Answer
The best way to decide is to try them yourself. Council lets you compare multiple AI responses to the same question.