Gemini comes in multiple sizes optimized for different tasks and devices.

The Gemini Model Lineup

• Gemini Ultra: Most powerful, best for complex reasoning and research
• Gemini Pro: Balanced performance — the workhorse for most tasks
• Gemini Flash: Fast and cost-efficient, best for high-volume applications
• Gemini Nano: Runs on-device (Android phones) — no internet required

The latest generation is Gemini 2.0, with significant improvements in reasoning, coding, and multimodal capabilities.

Reference:

Gemini model family

https://deepmind.google/technologies/gemini/