Over the coming years, Rivian Automotive (RIVN -2.78%) could become the next Tesla. It has several new mass market vehicles set to launch in 2026. If its sales trajectory matches what Tesla achieved when it introduced its first mass market vehicles, huge upside could be ahead.

But for now, there's only one number I'm paying attention to -- and we should get big news regarding this number in a matter of months.

This could be the most important number in Rivian's history

To become the next Tesla, Rivian has to execute on multiple key objectives. It must be able to ramp up production facilities, get its new mass market vehicles to customers on time, and match the quality that the company has been known for so far. Then, perhaps its sales will take off in a similar way to Tesla's history.

Before all this occurs, the market must remain confident that the company will succeed. That's because, despite reaching $5 billion in sales earlier this year, Rivian is still losing money on every vehicle it sells. Over the past 12 months alone, the company has accumulated a gross loss of nearly $2 billion. Many electric car stocks have failed to survive financially over the decades. If Rivian stumbles, it could see its capital availability dry up at any moment, essentially canceling its ability to pursue its long-term vision.

But as we'll see, there could be great news on this front very soon.

RIVN Revenue (TTM) Chart

RIVN Revenue (TTM) data by YCharts.

Earlier this year, Rivian's management team announced that they expect to achieve positive gross profits by the end of 2024. To say this would be a feat would be an understatement. Even after incremental improvements, the company still lost nearly $40,000 on every vehicle it sold last quarter. To close the gap to zero over a span of 90 days would be incredible.

If Rivian achieves positive gross profits this quarter, expect sentiment to improve sizably, as the company's future would become much clearer. We'll know more in a matter of months.