Llama and Perplexity could not be more different in their approach to AI. Llama is an open-source model you download and run on your own hardware — no data leaves your machine, no API costs, and you can fine-tune it for your specific needs. Perplexity is a cloud-based AI search engine that searches the web in real-time and cites every source automatically.
They serve completely different needs and require completely different prompting strategies. Llama prompts should provide full context explicitly since the model has no web access. Perplexity prompts should be focused research questions that leverage its search capabilities. Here's the full comparison.