Gemini 2.5 Flash-Lite is a lightweight reasoning model in the Gemini 2.5 family, optimized for ultra-low latency and cost efficiency. It offers improved throughput, faster token generation, and better performance across common benchmarks compared to earlier Flash models. By default, "thinking" (i.e. multi-pass reasoning) is disabled to prioritize speed, but developers can enable it via the Reasoning API parameter to selectively trade off cost for intelligence.
Google: Gemini 2.5 Flash Lite Preview 09-2025 – Recent Activity and Usage Stats
Recent activity on Gemini 2.5 Flash Lite Preview 09-2025
Total usage per day on OpenRouter
Prompt
2.3B
Completion
287M
Reasoning
32.1M
Prompt tokens measure input size. Reasoning tokens show internal thinking before a response. Completion tokens reflect total output length.