iH8sn0w first hinted that he had a jailbreak a few days ago, when he tweeted that Cydia does not crash on iOS 10. Today, he posted a video of an iPhone 5 running iOS 10 with an untethered jailbreak.
Since the video is of a 32-bit device and verbose mode is teased, we are assuming his jailbreak relies on his older iBoot exploit, which allows devices to be jailbroken for life. Nevertheless, it could help accelerate development of a jailbreak that works across all devices, including 64-bit ones such as the iPhone 6s. There is no word on whether iH8sn0w plans to release this jailbreak, or use it for research purposes.
As iOS 10 approaches this fall, many are still desperate for an iOS 9 jailbreak. The last jailbreaking tool released was Pangu9 for iOS 9.1.
Earlier this week, Luca Todesco dropped a 0day exploit for iOS 9.3.3 beta and lower -- about 25% of what's needed for a jailbreak. However, it will take more exploits and code to create a working jailbreak.
Please follow iClarified on Twitter, Facebook, Google+, or RSS for updates.