Tesla gives Optimus a human-like hand with 22 degrees of freedom

Building a humanoid robot is hard, but getting the hands right is arguably the hardest part of all.

Tesla just revealed an upgraded hand for its Optimus humanoid robot. In a newly released demo video, the new hand looks noticeably more realistic than previous iterations, complete with biological-inspired tendons driving finger movements.

Tendons, tactile sensors, and heavier forearms

Tesla says the new hand features 22 degrees of freedom, alongside an additional three degrees in the wrist and forearm. That level of articulation brings it significantly closer to the dexterity of human anatomy.

Milan Kovac, head of the Optimus program, shared some of the technical trade-offs behind the new design. To make the fingers nimble, the team moved all actuation into the forearm, pulling the fingers via tendons. But cramming the motors into the arm made it heavier, meaning weight reduction is now a top priority before the end of the year.

The team is also working on tactile sensing. Kovac noted they are integrating extended tactile sensors across much more surface area than before. The tricky part is balancing enough squishiness, compliance, and physical protection on the fingers without muting the tactile feedback.

Transparent about the strings attached

The demo is undeniably impressive, but there is an elephant in the room: it was entirely teleoperated by a human.

Teleoperation has become a sensitive topic for Tesla. Back at the recent We, Robot event, critics slammed the company for failing to disclose upfront that its roaming humanoids were being remote-controlled. This time, Tesla avoided the trap by quickly confirming that human operators were at the controls.

Beyond lab demos, Tesla claims it is already putting some Optimus robots to work inside its own factories, with plans to ramp up deployment next year.

Why it matters

Humanoid hands are a notorious engineering nightmare, and Tesla's mechanical progress here is genuinely impressive. Moving actuation to the forearm and relying on tendon-driven kinematics allows for slimmer, more human-like digits. Still, high-stress tendon wires introduce serious long-term wear and maintenance hurdles that factory environments will brutally test.

We think Tesla's willingness to be upfront about teleoperation this time around is a welcome course correction. Teleoperating robots through fine motor tasks is not just a parlor trick; it is currently the primary method for gathering high-fidelity imitation learning data. You need mechanical hands capable of nuanced manipulation before modern AI can learn to use them autonomously.

That said, high dexterity without autonomy remains an incomplete package. Testing these hands on Tesla's own factory floors makes sense to validate durability, but until Optimus can handle assembly tasks without a human pulling the digital strings, it remains a telepresence platform with massive, yet unrealized, potential.