From left, European Council President Antonio Costa, Ukraine's President Volodymyr Zelenskyy and European Commission President Ursula von der Leyen arrive for the EU summit in Brussels, Friday, Oct. 16, 2026. (AP Photo/Omar Havana)

From left, European Council President Antonio Costa, Ukraine's President Volodymyr Zelenskyy and European Commission President Ursula von der Leyen arrive for the EU summit at the European Council building in Brussels, Friday, Oct. 16, 2026. (AP Photo/Geert Vanden Wijngaert)

Poland's Prime Minister Donald Tusk, left, speaks with Ukraine's President Volodymyr Zelenskyy during a bilateral meeting on the sidelines of the EU summit in Brussels, Thursday, Oct. 15, 2026. (Nicolas Tucat, Pool Photo via AP)

In this photo provided by the Ukrainian Presidential Press Office, Ukrainian President Volodymyr Zelenskyy, left, and Secretary General of NATO Mark Rutte pose for a photo prior to their meeting in Brussels, Thursday, Oct. 15, 2026. (Ukrainian Presidential Press Office via AP)

French President Emmanuel Macron, left, shakes hands with Ukraine's President Volodymyr Zelenskyy during a bilateral meeting on the sidelines of the EU summit in Brussels, Thursday, Oct. 15, 2026. (Ludovic Marin, Pool Photo via AP)

Belgium's King Philippe, left, greets Ukraine's President Volodymyr Zelenskyy at the Royal Palace in Brussels, Thursday, Oct. 15, 2026. (AP Photo/Geert Vanden Wijngaert)

In this photo provided by the Ukrainian Emergency Service, emergency services personnel work in residential neighborhood following a Russian air attack in Kyiv, Ukraine, Thursday, Oct. 15, 2026. (Ukrainian Emergency Service via AP)

FILE - Chat GPT app icon is seen on a smartphone screen, Aug. 4, 2025, in Chicago. (AP Photo/Kiichiro Sato, File)