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Gemini 3.1 Flash Lite

Gemini 3.1 Flash Lite is the GA release of the efficiency tier in the Gemini 3.1 generation, with improvements in reasoning, multimodal understanding, agentic tool use, and long-context performance over 2.5 Flash Lite, plus four configurable thinking levels and a context window of 1M tokens.

ReasoningTool UseImplicit CachingFile InputVision (Image)Web Search
index.ts
import { streamText } from 'ai'
const result = streamText({
model: 'google/gemini-3.1-flash-lite',
prompt: 'Why is the sky blue?'
})

Providers

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Provider
Context
Latency
Throughput
Input
Output
Cache
Web Search
Per Query
Capabilities
ZDR
No Training
Release Date
Google
Legal:Terms
Privacy
1M
2.3s
477tps
$0.25/M$1.50/M
Read:$0.03/M
Write:
$14.00/K
+ input costs
05/07/2026
Google Vertex AI
Legal:Terms
Privacy
1M
0.9s
250tps
$0.25/M$1.50/M
Read:$0.03/M
Write:
$14.00/K
+ input costs
05/07/2026