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Qwen is good for reasoning/feedback/creative work. I use it a lot when reviewing documentation, prose and some code, it's the one I like the most.

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.

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I got Perplexity Pro one year for free, what makes Opus 4.1 search so good? Is it worth switching?

I don't know whether I can give you a conclusive answer, due to how query-dependent the results are and the lack of determinism.

I really like perplexity and if you get it free it's hard to justify spending 100$/month.

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!

Yes this happened.

Few recent examples:

- find me public companies listed in Poland that have the best z-index of dividend yield, payout ratio and earnings growth

- list the most important psychological tendencies and biases that crew resource management tries to address

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.

Deep research, I don't trust LLMs with anything really.

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