// google

Gemini 3.1 Flash Lite

google/gemini-3.1-flash-lite

reasoningtool callingimage inputvideo inputfile inputaudio inputprompt caching
OpenRouter + LiveBenchAll modelsFull leaderboard

Gemini 3.1 Flash Lite costs $0.250 per 1M input tokens and $1.50 per 1M output tokens with a 1.0M-token context window.

A reasoning, tool-calling model from google, released May 7, 2026. LiveBench hasn't published a run for it, so this page carries measured price and specs only — no benchmark numbers.

Input / 1M
$0.250
Output / 1M
$1.50
Context
1.0M
LiveBench overall
Not evaluated

Specs and pricing

Input price

USD per 1M prompt tokens

$0.250
Output price

USD per 1M completion tokens, reasoning included

$1.50
Blended price

3:1 input:output — #152 cheapest of 343 listed models

$0.563
Cached input read

Blank means not priced separately — not free

$0.025
Cache write$0.083
Context window1,048,576 tokens
Max output65,536 tokens
Input modalitiestext, image, video, file, audio
Tool callingYes
Extended reasoningYes
Knowledge cutoff
ListedMay 7, 2026
All Google API pricing

Also listed as google/gemini-3.1-flash-lite:batch ($0.281 blended)— the same model at a different price or rate limit.

What Gemini 3.1 Flash Lite costs to run

Monthly list cost across five workload shapes, using the published cached-input rate where there is one. A floor, not a quote — batch discounts and cache writes aren't included.

WorkloadPer month
Support chatbot

1.2K in / 400 out × 200K requests

$163.80/mo
RAG assistant

8K in / 600 out × 100K requests

$200.00/mo
Coding agent

40K in / 4K out × 20K requests

$194.00/mo
Document extraction

20K in / 1.5K out × 50K requests

$351.25/mo
Bulk classification

500 in / 20 out × 5M requests

$662.50/mo
Price your own workload

Compare Gemini 3.1 Flash Lite with

Benchmarked models at a similar price.

Gemini 3.1 Flash Lite FAQ

How much does Gemini 3.1 Flash Lite cost?

Gemini 3.1 Flash Lite lists at $0.250 per 1M input tokens and $1.50 per 1M output tokens, with cached input reads at $0.025 per 1M. A RAG assistant handling 100K requests a month (8K tokens in, 600 out) comes to about $200.00 at list price.

What is the context window of Gemini 3.1 Flash Lite?

Gemini 3.1 Flash Lite accepts up to 1,048,576 tokens of context and can return up to 65,536 output tokens per response.

Does Gemini 3.1 Flash Lite support tool calling?

Yes — Gemini 3.1 Flash Lite supports tool (function) calling and exposes extended reasoning. It accepts text, image, video, file, audio input.

How does Gemini 3.1 Flash Lite score on benchmarks?

LiveBench has not published a run for Gemini 3.1 Flash Lite yet. Until it does, compare it on price and specs, or run your own evaluation on your own tasks.

What is the API model ID for Gemini 3.1 Flash Lite?

On OpenRouter the model ID is "google/gemini-3.1-flash-lite". It was listed on May 7, 2026.

More from google

How these numbers are produced

  • Price and specs — provider list data from OpenRouter, refreshed every 15 minutes. “Blended” is a 3:1 input:output mix.
  • Scores and ranksLiveBench release 2026-06-25. Ranks count only models that have a published run; a blank means “not evaluated”, never “bad”.
  • Cost per point — the measured dollars LiveBench spent on the run, divided by the score it earned.

Published benchmarks rank models on someone else's tasks. Before committing, see LLM & agent evaluation for building an eval on your own.