Google: Gemini 2.5 Flash Lite Preview 09-2025

GoogleID: google/gemini-2.5-flash-lite-preview-09-2025

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.

Pricing per 1M Tokens

Input (Prompt)$0.10
Output (Completion)$0.40
Cache Read$0.01
Cache Write$0.08
Image$0.10

Specifications

Context Length1.0M
Max Output Tokens66K
Input ModalitiesText + Image + File + Audio + Video
Output ModalitiesText
TokenizerGemini
Instruct TypeN/A
Top Provider Context1.0M
Top Provider Max Output66K
ModeratedNo

Compare this model

See how Google: Gemini 2.5 Flash Lite Preview 09-2025 stacks up against other models.

vs Google: Gemini 3.1 Flash Lite Previewvs Google: Nano Banana 2 (Gemini 3.1 Flash Image Preview)vs Google: Gemini 3.1 Pro Preview Custom Toolsvs Google: Gemini 3.1 Pro Previewvs Google: Gemini 3 Flash Preview

More from Google

Google: Gemini 3.1 Flash Lite Preview
Input$0.25
Context1.0M
Google: Nano Banana 2 (Gemini 3.1 Flash Image Preview)
Input$0.50
Context66K
Google: Gemini 3.1 Pro Preview Custom Tools
Input$2.00
Context1.0M
Google: Gemini 3.1 Pro Preview
Input$2.00
Context1.0M
Google: Gemini 3 Flash Preview
Input$0.50
Context1.0M

Last updated: March 23, 2026

First tracked: March 23, 2026