Musk claims that Optimus will be the most challenging product Tesla has ever scaled.

      Elon Musk informed investors during Tesla's second-quarter earnings call that Optimus will be "the most challenging product to scale in manufacturing that we’ve ever created at Tesla," highlighting that the humanoid robot lacks an established supply chain and that all components are new. He aimed to set realistic expectations, acknowledging that while the initial production increase will follow a typical curve, the early flat phase may extend longer than investors anticipate. In addition, Tesla discreetly removed any mentions of mass production for Optimus from its Q2 shareholder presentation after having used such terminology as recently as the first quarter.

      This marks a significant shift from Musk's previous statements. Last year, he expressed that he would be "shocked" if Tesla wasn't producing 100,000 Optimus robots a month within five years, and in January 2025, he estimated 50,000 to 100,000 units for 2026. However, by January of this year, he recognized that no Optimus robots were currently performing useful tasks in Tesla's factories, with the more than 1,000 Gen 3 units at Fremont and Gigafactory Texas merely gathering training data.

      Musk was straightforward about the engineering challenges, stating that Optimus requires at least human-level dexterity to be effective outside of controlled factory environments, praising the human hand as "an incredible thing" that no robotics firm has successfully replicated. Moreover, Tesla needs to address challenges related to memory, logic, and chip packaging while securing AI processors from companies such as Samsung and TSMC. The robot is composed of approximately 10,000 unique parts, and unlike its Chinese competitors, which can leverage an existing smartphone supply chain for components like actuators and precision motors, Tesla is starting its manufacturing base from nothing.

      The financial context adds additional pressure. Tesla reported $28 billion in Q2 revenue, a 26 percent increase, but adjusted earnings of 33 cents per share fell short of the 51 cents analysts had expected, with operating income dropping 57 percent. Capital expenditures soared to nearly $6 billion during the quarter, as part of Tesla’s $25 billion annual spending plan, resulting in negative free cash flow of $1 billion and causing shares to fall about seven percent in pre-market trading on Wednesday.

      Musk’s compensation package is partially linked to the delivery of one million Optimus robots within a decade, a target that now feels misaligned with his own cautions regarding the challenges of scaling production. Tesla has adapted its Fremont Model S and Model X lines for Optimus production and is constructing a dedicated facility near Gigafactory Texas, but the company has refrained from committing to a timeline for starting volume output. Tesla’s president in China has called the Shanghai Gigafactory a "golden key" for mass-producing Optimus, although that factory has yet to commence robotics manufacturing.