In Marvel's "X-Men: Gold" series, the advanced Sentinel codenamed 0101 emerges as a formidable adversary. Introduced in issue #5, released in 2017, this nanite-based AI Sentinel was crafted by writer Marc Guggenheim and artist R.B. Silva. Unlike traditional Sentinels, 0101 possesses the ability to adapt and evolve, making it a significant threat to mutants. Throughout the series, it collaborates with anti-mutant activist Lydia Nance, intensifying its menace. The X-Men, led by Kitty Pryde, confront 0101 in a gripping storyline that spans multiple issues, including #27 and #29. This arc showcases the team's resilience against an ever-evolving foe, highlighting the creative team's ability to blend classic X-Men themes with contemporary challenges.