A Blackmagic Pocket Cinema starter bundle comes close, would be under 1500 but over 1000 USD. Gives you BRAW or ProRes, both log. Infinite more control over the captures, huge ecosystem of (professional) tooling and equipment that is compatible with it.
That's already way more than you need to beat the iPhone. The iPhone can't even capture 4k 60fps ProRes on device - you need to connect an external recording device to use that.
Also note that, according to its datasheet, the iPhone cannot capture video on its tiny 48MP sensor at that resolution at all - just 4k.