Prompt: what probability to you assign to alien intelligence on this planet - examine the actual evidence

Answer by different AIs:

Claude Opus 4.7: 3-8%
Sonnet 4.6: ~1–3%.
Claude Haiku 4.5: ~0.5-1%
Grok expert: "effectively zero—far below 0.01% (i.e., <1 in 10,000)"