Alphabet faces securities class action over alleged Gemini 3.5 Pro AI delays

Law firms are reminding Alphabet Inc. investors of upcoming deadlines, primarily December 1, 2026, to seek lead plaintiff status in a federal securities class action filed in the U.S. District Court for the Northern District of California. The lawsuit alleges Alphabet concealed disappointing training results and significant launch delays for its flagship Gemini 3.5 Pro artificial intelligence model. The class period spans May 19 to July 16, 2026. On July 16, 2026, media reports revealing that the model was months behind schedule triggered a 4.4% drop in Alphabet shares, with Class A common stock declining $16.46 to close at $354.46.