Gemini 3.1 Flash-Lite

Deprecated

Stable cost-efficient multimodal model for high-volume tasks.

Access details: Gemini API

The model ID to use in API requests.

gemini-3.1-flash-lite

Updated Sep 23, 2026

Sources & notes

Capabilities & limits

Context window: 1M
Maximum output: 64K
Image input: Supported
Tool calling: Supported
Structured output: Supported

Pricing

USD / 1M tokens

Input: $0.25
Output: $1.50

Standard rates per million tokens. Discounts and long-context rates, where offered, are on Google's pricing page.

Full rate card 6 rates

All prices in USD.

Standard input

$0.25 per 1M tokens

text, image, or video input

Audio input

$0.50 per 1M tokens

audio input

Standard output

$1.50 per 1M tokens

includes thinking tokens

Cached input

$0.025 per 1M tokens

text, image, or video input

Cached audio input

$0.05 per 1M tokens

audio input

Cache storage

$1.00 per 1M tokens per hour

context caching storage

Paid tier. Batch and Flex: $0.125 input ($0.25 audio) / $0.75 output / $0.0125 cached ($0.025 audio), storage $0.50 per 1M tokens per hour. Priority: $0.45 input ($0.90 audio) / $2.70 output / $0.045 cached ($0.09 audio), storage $1.80. Free tier is free of charge. Grounding with Google Search: 5,000 free requests per month shared across Gemini 3.x models, then $14 per 1,000.

Price history

Sep 13, 2026

Input $0.25 per million tokens

Sep 13, 2026

Output $1.50 per million tokens

Technical details

Parameters: Not published
Active parameters: Not published
Architecture: Based on Gemini 3 Pro, a sparse mixture-of-experts (MoE) transformer with native multimodal support
Training / knowledge cutoff: January 2025
Input modalities: Text, image, video, audio, PDF
Output modalities: Text

From Google

Official announcement ↗

Release & lifecycle

First available: May 7, 2026
deprecated: As of Sep 13, 2026