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](https://openrouter.ai/docs/use-cases/reasoning-tokens) to selectively trade off cost for intelligence.
Gemini 2.5 Lite is a compact model from Gemini : optimized for speed and affordability.
Small, fast, and affordable. Optimized for speed and low cost, great for high-volume or simple tasks.
| Type | per 1M tokens |
|---|---|
| Input (prompt) | $0.100 |
| Output (completion) | $0.400 |
| Image | $0.100 |
| Internal reasoning | $0.400 |
| Cache read | $0.010 |
| Cache write | $0.083 |
This model may use your data for training