I like "AI Risk Reduction Institute". It's direct, informative, and gives an accurate intuition about the organization's activities. I think "AI Risk Reduction" is the most intuitive phrase I've heard so far with respect to the organization.

• "AI Safety" is too vague. If I heard it mentioned, I don't think I'd have a good intuition about what it meant. Also, it gives me a bad impression because I visualize things like parents ordering their children to fasten their seatbelts.
• "Beneficial Architectures" is too vague. It's not clear it's AI-related.
• "AI Impacts Research" is too vague and non-prescriptive. Unlike "AI Risk Reduction", it's ambiguous in its intentions.