Gemini 2.5 Flash-Lite is Google's most economical model — built for high-volume, latency-sensitive workloads where cost and speed matter most.
It has the highest free quota on Google AI Studio (~1,000 requests/day at the time of writing), rate-limited, no credit card. Exact limits are set by Google and may change — check your AI Studio dashboard. Ideal for prototyping and high-throughput tasks on a free budget.