Gemini 3.1 Flash-Lite, the fastest and most cost-efficient model in Google's Gemini 3 series, reached general availability on May 7, 2026. Pricing is $0.25 per million input tokens and $1.50 per million output tokens. The model is optimized for ultra-low latency, high-volume automated pipelines, and agentic use cases such as tool calling and orchestration.