Hot on the heels of i0n1c's proofs that he had jailbroken an iPhone 5c running iOS 7.1.1, iOS hacker winocm has come up with her own untethered jailbreak successfully running on an iPhone 4 with iOS 7.1.1.
While not as impressive as i0n1c's proof, winocm claims that her jailbreak could be brought to newer devices if someone was willing to "put in the effort."