Tesla stock edged higher on Wednesday after CEO Elon Musk did something surprising: hit one of his promised timelines. Production of Tesla’s purpose-built robo-taxi, Cybercab, has begun.

Shares of the electric vehicle maker added 0.1%, closing at $411.22, while the S&P 500 and Dow Jones Industrial Average gained 0.6% and 0.3%, respectively.

The move for Tesla shares came after Musk posted on X Tuesday afternoon: “Congratulations to the Tesla team on making the first production Cybercab!”

“Initial Cybercab production may be for a limited number in support of testing and validation,” wrote Barclays analyst Dan Levy in a Tuesday report. “Today’s announcement is supportive of the April [production] timeline.”

April assembly-line production of Cybercab, unveiled in late 2024, is largely on schedule. That’s impressive. Musk, who has acknowledged his penchant for optimism, doesn’t hit milestones on time. Tesla’s Cybertruck hit the roads four years after being unveiled. Some buyers are still waiting for Tesla’s second roadster, which was announced in 2017.

The Cybercab supports Tesla’s ambition to become a physical artificial-intelligence company, creating AI-trained products that interact with the real world.

Tesla launched an AI-trained robo-taxi service in Austin, Texas, in June, competing with Alphabet’s Waymo, using Tesla Model Y vehicles as the cabs. Eventually, Cybercabs will be added to the network. Tesla plans to expand its robo-taxi network tonine citiesin the first half of 2026.

Eventually, Cybercabs will also be sold to anyone wanting to operate a fleet of robo-taxis on their own.

Tesla has bet big on self-driving technology. It also got some more good self-driving news on Tuesday after California said the company took corrective action to avoid a Department of Motor Vehicles suspension, which would have impacted Tesla dealers and manufacturing for a period of time. The state took issue with how the company marketed its driver-assistance systems, called Autopilot and Full Self-Driving.

FSD can do most of the driving most of the time, but it isn’t a truly autonomous driving system. Drivers need to pay attention all the time, and California officials thought the name was misleading.

Tesla has dropped the use of Autopilot in its marketing and made it clearer that FSD needs to be supervised.

Eventually, Tesla plans to turn FSD into a product that allows drivers to stop paying attention some of the time. That’s another milestone investors can look forward to.