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A few days ago, Musk said the Cybercab's battery pack would shrink from 47.6 kWh to 40 kWh—a 16% reduction.

On the surface, it sounds like a minor tweak to the specs. In reality, it cuts to the heart of the matter: the battery is the single most expensive component of an electric vehicle. Every kilowatt-hour saved reshapes the vehicle's price, weight, and charging profile all at once.

At bottom, this is a war over cost per kilometer.

Today, let's run the automotive numbers from four angles: household gasoline cars, electric cars, taxis, and ride-hailing.

First, let's lay out all four sets of books.

The first ledger: household gasoline cars. At 8 liters per 100 kilometers and a national average of about 8.94 yuan per liter for No. 92 gasoline, fuel alone runs around 7 dimes per kilometer—before maintenance and depreciation even enter the picture.

The second ledger: household electric cars. Home charging consumes roughly 15 kWh per 100 kilometers, costing under a dime per kilometer; public charging stations run just over 2 dimes. Switching from oil to electricity slashes energy costs by 80%.

The third ledger: taxis and ride-hailing. A ride costs you 2 to 3 yuan per kilometer. The biggest expense isn't fuel or the vehicle—it's the driver: fully loaded costs run 0.8 to 1.2 yuan per kilometer, with labor taking the largest share.

The fourth ledger: Robotaxi. In 2019, the cost per kilometer was as high as 23.3 yuan; it fell to 4.5 yuan in 2023 and sits at about 2.1 yuan this year—exactly breaking even with taxis and ride-hailing. The industry calls this the "golden crossover."

How did the turning point come about?

Cost reduction rests mainly on two blades.

The first blade cuts vehicle price. Baidu's Apollo Go RT6 has a whole-vehicle cost of 204,600 yuan, roughly 60% below the previous generation's 480,000 yuan; Pony.ai's 2027 version targets under 230,000 yuan; the Cybercab goes further still—no steering wheel, no pedals, no mirrors, and a battery another 16% smaller.

The second blade cuts people. Regulators require remote safety operators to monitor at least 3 vehicles per person, and this accounts for 38% of Apollo Go's cost per order—its single largest expense. How far the person-to-vehicle ratio can be stretched depends on both technology and regulation.

Once those cuts land, the ledger flips. Shenwan Hongyuan ran the numbers across Apollo Go's three vehicle generations: the fifth generation loses 335 yuan per day, the sixth loses only 6 yuan, and the seventh earns 66 yuan. The brokerage's conclusion: a model with no safety operator can reach 1.13 yuan per kilometer, with a floor of 0.8 yuan.

Shenzhen has already supplied empirical evidence: Pony.ai's average daily net income per vehicle is 338 yuan, while a human ride-hailing driver averages 256.58 yuan per day.

Breaking even on paper doesn't mean the endgame is here.

The first to throw cold water is Tesla itself. Musk insists the Cybercab must be pushed down to $0.2 per mile, but institutional estimates tell a completely different story: JPMorgan calculates $0.5 to $0.6, and once insurance, cleaning and maintenance, and remote assistance are added in, the figure lands at $0.49 to $0.9. Morgan Stanley alone puts insurance at $0.2 to $0.35—the target price isn't even enough to cover insurance.

Beyond the ledger lies an even more critical variable: whether the car can stay busy all the time. Empty-running rate, order density, nighttime idleness—these unglamorous factors never make it into the pitch deck, yet they are what determine the real cost.

Now consider the penetration pace. Goldman Sachs predicts that Robotaxi's share of China's shared mobility fleet will be under 1% in 2025, 12% in 2030, and 36% in 2035.

Baidu's own test data is telling too: in edge scenarios such as extreme weather, the L3 pass rate is 75% to 85%, while human drivers sit at 98%. Grinding down that remaining long tail could take many years yet.

So the more likely picture isn't replacement but order-splitting: short trips, late nights, and airport runs go to machines, while complex road conditions and long distances stay with people.

The ride-hailing era of "grind hard enough and you can clear 10,000 yuan a month" is over—but the profession of driver is still a long way from "graduation."

The war over a single kilometer has reached this point, and the price anchor has already begun to loosen.

Do you think ride fares will get cheaper as a result? Join the conversation in the comments.

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