- The author built a custom home surveillance system using Frigate for person detection, funneling to Casa Segura for finer detection.
- False positives from dogs being detected as persons are the main issue, with the goal of reducing alarms at night.
- Gemini 3.5 Flash Lite was tested against Gemini 3.1 Flash Lite and Gemini 3.1 Pro on a benchmark of 18 clips (10 without humans, 8 with humans).
- Gemini 3.5 Flash Lite produced one false positive (confidence 0.90) on a dark dog far away at night, while Gemini 3.1 Flash Lite and 3.1 Pro had zero false positives.
- Pricing: Gemini 3.5 Flash Lite is 50% more expensive than 3.1 Flash Lite ($0.30/$2.50 per M vs $0.25/$1.50), while Gemini 3.1 Pro is about 8x more expensive.
- Latency: Gemini 3.1 Flash Lite is slightly faster (~2.9s median) than 3.5 (~3s), while Pro is much slower (~10s).
- The conclusion is that the new model is marginally worse, and false positives can be reduced by re-querying the same model rather than switching models.