TOKYO (Kyodo) -- Tokyo stocks ended mixed Friday, as concerns over weaker-than-expected artificial intelligence-related demand following a report on OpenAI pressured the benchmark Nikkei index, while indications that U.S. military action against Iran is not imminent supported investor sentiment.

The 225-issue Nikkei Stock Average ended down 11.19 points, or 0.02 percent, from Thursday at 69,030.92. The broader Topix index finished 13.35 points, or 0.33 percent, higher at 4,104.81.

On the top-tier Prime Market, the main gainers were marine transportation, food and service issues, while bank and nonferrous metal shares were notable decliners.

The U.S. dollar moved around the 158 yen line in Tokyo amid directionless trade with a lack of fresh incentives, traders said.

At 5 p.m., the dollar fetched 158.33-34 yen compared with 157.83-93 yen in New York and 158.18-19 yen in Tokyo at 5 p.m. Thursday.

The euro was quoted at $1.1231-1233 and 177.83-87 yen against $1.1205-1215 and 176.99-177.09 yen in New York and $1.1195-1196 and 177.09-13 yen in Tokyo late Thursday afternoon.

The yield on the benchmark 10-year Japanese government bond ended down 0.070 percentage point from Thursday's close at 3.010 percent, as concerns over spreading inflationary pressures eased following a decline in crude oil prices.

AI- and semiconductor-related shares tracked declines by their U.S. counterparts, after the Financial Times reported that OpenAI had told investors its annualized revenue was approaching $50 billion, down from the $70 billion it reportedly said late last month.

"AI demand may not actually be weakening, as other (AI) companies' market shares are expanding in the back of the report on OpenAI," said Maki Sawada, strategist in the Investment Content Department of Nomura Securities Co.

The benchmark Nikkei index lost nearly 900 points in early trading but briefly moved into positive territory toward the end of the day on dip-buying, while the Topix index traded largely in positive territory on buybacks following the announcement of the index's revamp.

The market was also supported by a social media post from U.S. President Donald Trump that the United States would not attack Iran before the U.S. midterm elections on Nov. 3.