Go to the 'Workflows' tab, make a new one with keyword of your choice (e.g. llm), and map it to open these urls in your default browser:

http://localhost:3005/?q={query}

https://www.perplexity.ai/?q={query}

https://x.com/i/grok?text={query}

https://chatgpt.com/?q={query}&model=gpt-5

https://claude.ai/new?q={query}

Modify to your taste. Example: https://github.com/stevecondylios/alfred-workflows/tree/main (you should be able to download the .alfredworkflow file and double click on it to import it straight into alfred, but creating your own shouldn't take long, maybe 5-10 mins if it's your first workflow)