Skip to content
Log In
Sign Up
Dashboard

Gemini 2.5 Flash Lite Preview 09-2025

Gemini 2.5 Flash Lite Preview 09-2025 is Google's September 2025 preview of the next Flash Lite generation, delivering better instruction following, up to 50% fewer output tokens, and improved multimodal understanding including audio transcription and image analysis.

File InputReasoningTool UseVision (Image)Web SearchImplicit Caching
index.ts
import { streamText } from 'ai'


const result = streamText({
  model: 'google/gemini-2.5-flash-lite-preview-09-2025',
  prompt: 'Why is the sky blue?'
})
OverviewPlaygroundAboutProvidersUptimeStatusSimilarFAQ

About Gemini 2.5 Flash Lite Preview 09-2025

Gemini 2.5 Flash Lite Preview 09-2025 is a preview release from Google dated September 25, 2025. It gives you early access to the next Flash Lite tier. The preview builds on the stable Gemini 2.5 Flash Lite with three focused improvements.

First, instruction following. The preview handles complex instructions and system prompts more reliably. You'll see a smaller gap between what you ask for and what you get back. Second, verbosity. Google reported up to a 50% reduction in output tokens compared to the current stable Flash Lite. Fewer tokens means lower cost and faster responses for the same task. Third, multimodal capabilities. Audio transcription, image understanding, and translation all improved.

This preview collects developer feedback rather than replacing the stable Flash Lite. Google introduced a -latest alias system (e.g., gemini-flash-lite-latest) alongside these previews. These aliases give you automatic access to the newest version with a two-week deprecation notice. Preview models rotate. Pin to the explicit model string gemini-2.5-flash-lite-preview-09-2025 if you need consistent behavior during evaluation.