Gemini

Google Gemini: From 1.0 to the Flash Releases That Replaced a Pro

Google introduced Gemini in December 2023 as a multimodal family with Ultra, Pro and Nano sizes, then made long context central to Gemini 1.5 and established Flash as its lower-cost, lower-latency tier. Gemini 2.5 added “thinking” models, but Google subsequently retired the 1.5 and 2.0 API generations and moved latest-model aliases to Gemini 3.