By Abhirup Roy and Akash Sriram

Rivian Automotive on Tuesday raised its full-year production forecast and its chief executive said the electric vehicle maker has enough money to last it through 2025 as it keeps a lid on costs.

Shares in Rivian, which initially rose 3% after results were published, were up 1% in choppy extended trading. The stock has soared nearly 80% in the past three months.

The Amazon-backed company, like other EV rivals has been burning through cash to ramp up production and keep up with market leader Tesla, which has slashed prices.

Rivian, though, has fared better than smaller firms as demand for its pickup trucks and sport-utility vehicles has risen despite high borrowing costs for consumers.

The competition and a tight funding environment led two EV firms - Lordstown Motors and Proterra - to file for bankruptcies in June and this week, respectively.

In an interview with Reuters, Rivian CEO RJ Scaringe said his company was in a far stronger financial position.

"The cash balance that we have today takes us through 2025," Scaringe said. "We will be very thoughtful and intentional on how we secure additional capital to support the growth of the R2 program," he added, referring to the company's upcoming lineup of smaller, cheaper cars.

Rivian's cash balance fell by nearly $2 billion in the second quarter to $9.26 billion.

After struggling to ramp up production because of a shortage of parts such as power semiconductors, Rivian has moved to building in-house Enduro powertrains to cut costs and reduce dependency on suppliers.

The company on Tuesday posted second-quarter revenue of $1.12 billion, topping Wall Street estimates of $1 billion, according to Refinitiv data and posted a smaller quarterly loss. It said it expected to make 52,000 vehicles in the year, up from its previous forecast of 50,000 units.

Second-quarter gross margins improved to a negative 37%, compared with negative 81% in the first quarter, and the company now expects its full-year operating loss to shrink by $100 million from its prior guidance to $4.2 billion.

It delivered 12,640 vehicles in the April-June period, beating analysts' estimates of 11,000.

As the company grew deliveries and built efficiencies in the June quarter, it posted an adjusted loss of $31,595 per vehicle sold, compared with a loss of $67,329 in the previous three months.

(Reporting by Akash Sriram in Bengaluru and Abhirup Roy in San Francisco; Editing by Shinjini Ganguli and Jamie Freed)