What is the fastest local research tool (deep research) ?

I've tried grok and Claude's deep research mode and I was amazed with the speed considering the amount of sources analysed. Is there anything as fast that can run locally? My guess would be that to run faster, searches should be done in parallel by subadgents with an API (and not by emulating a ful

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I've tried grok and Claude's deep research mode and I was amazed with the speed considering the amount of sources analysed. Is there anything as fast that can run locally? My guess would be that to run faster, searches should be done in parallel by subadgents with an API (and not by emulating a ful