I understand, I thought maybe there was a couple of cases you stumbled upon that Opus 4.1 was better at, which made you rank it higher than Perplexity!
By research you mean web search/deep research or only use knowledge embedded in llm? I use ChatGPT most of time, didn't find Claude work better for me, maybe I should switch if there is a big gap in performance.
But when it comes to researching information is consistently among the worst performers in my comparisons.
Generally the order is Opus 4.1 > Perplexity > Gemini Pro >> GPT 5 >> Qwen.