Lineage · Since 2023
The Gemini lineage
Google DeepMind's multimodal Gemini family, successor to PaLM and Bard.
Generation 1 · Dec 6, 2023
Gemini 1.0
First Gemini generation with Ultra, Pro and Nano sizes.
Closed32K ctxMultimodalmultimodal reasoning
Generation 2 · Feb 15, 2024
Gemini 1.5 Pro
Introduced the 1M–2M token context window on a mixture-of-experts architecture.
Closed2M ctxMultimodallong contextmultimodal
Generation 3 · Dec 11, 2024
Gemini 2.0 Flash
Google's fast, low-cost Gemini 2.0 model with native tool use and a 1M-token context window; generally available from February 2025.
Closed1M ctxMultimodal
Generation 4 · Mar 25, 2025
Gemini 2.5 Pro
Reasoning-focused member of the Gemini 2.5 family.
Closed1M ctxMultimodalthinkingmultimodal