When Chinese electric carmaker XPeng Motors unveiled its new humanoid robot Iron last week, the audience at a Guangzhou tech fair couldn’t believe their eyes. The tall, silver-skinned figure glided across the stage with slow, deliberate female movements — so human that murmurs rippled through the crowd. “It’s just a woman in a suit.”
But XPeng’s CEO, He Xiaopeng, wasn’t laughing. Within 24 hours, the company staged a second demonstration — this time with a twist worthy of a sci-fi film. In front of reporters, an engineer cut open Iron’s leg on stage to expose the robot’s inner frame — wires, servos, and a steel-colored skeleton. And then she walked off stage.
“You can see her ears.”
Social media quickly agreed. On Weibo and X (formerly Twitter), thousands accused XPeng of staging a hoax. “You can literally see her ears through the fabric,” one commenter wrote. Another quipped, “She moves like Scarlett Johansson in Under the Skin.”
If the spectacle felt familiar, that’s because it was. When Elon Musk first introduced Tesla’s Optimus in 2021, the “robot” on stage was famously just a man in a spandex suit.
Four years later, Optimus has evolved into a smooth-moving, bipedal machine capable of walking, lifting boxes, and even folding laundry — though much of it remains teleoperated behind the scenes.
Tesla’s design is overtly mechanical: bare metal limbs, visible actuators, no attempt to resemble a person. XPeng’s Iron, by contrast, leans into anthropomorphism with a synthetic skin (the ‘silver body suit’), a female body shape, and even a humanlike gait. Where Optimus aims to be practical, Iron aims to be believable.
“Optimus is a factory worker; Iron is a performer,” said robotics analyst Li Xue of the Chinese tech journal 36Kr. “XPeng isn’t just building a robot — they’re testing how humans react to one.”
Musk: “Not bad…”
“Not bad … Tesla and Chinese companies will dominate the market,” Elon Musk commented on Xpeng Iron in a chat, according to a report by local Chinese media. “I have great respect for China’s competition. So many smart, hardworking people in China,” he said.
The reveal was more than a publicity stunt. For XPeng, best known for its electric cars and flying-vehicle prototypes, Iron represents a strategic leap into what the company calls ‘physical AI’, intelligent machines that can navigate, interact, and assist in the real world.
Full-stack AI system
According to the company’s statements, Iron is powered by a full-stack AI system that integrates hardware, software, and large-language model reasoning. Each hand has 22 degrees of freedom, and its joints and spine are modeled after human anatomy. The robot can walk, gesture, and maintain balance autonomously.
XPeng says mass production could begin as early as 2026, with applications in hospitality, retail, and elder care. “In the long run, the humanoid robot market will be twice as large as the car industry,” He predicts — an ambitious claim that places robotics at the center of XPeng’s future.
Resurgence of humanoid robots
XPeng and Tesla are far from alone. 2025 has seen a resurgence of humanoid robotics after years of stagnation. Boston Dynamics recently unveiled a fully electric version of its legendary Atlas, capable of running, vaulting, and lifting heavy objects with startling agility.
Norway’s 1X Technologies, backed by OpenAI, launched Neo, a household assistant resembling a minimalist speaker on legs, equipped with AI vision and voice control. And Japanese startup AgiLab is developing robots for elder care with emotional-response systems modeled on human empathy.
Together, they form a new frontier — one where the boundaries between AI, mechanics, and humanity blur. The competition is not just about mobility but about trust: which company can make machines that feel human enough to serve us without unsettling us?
Publicity illusion?
Still, questions linger about how autonomous Iron truly is. XPeng’s demonstrations were tightly choreographed, and observers note that no raw footage of the robot performing outside the stage setting has yet surfaced.
Critics online call the reveal “a publicity illusion designed to lure investors.” But others see something more profound. “Whether or not Iron is fully independent, the symbolism matters,” said robotics ethicist Dr. Sun Rui of Tsinghua University. “XPeng is telling us that the age of believable humanoids is no longer decades away — it’s already here.”
