Gemini 3.1 Flash Lite

Save 70%Official

google/gemini-3.1-flash-lite

Gemini 3.1 Flash-Lite — Google's most cost-efficient model for high-volume tasks.

Get an API key View code sample

Context window: 1M
Max output: 66K
Input modalities: text · image · audio · video
Output modalities: text
Capabilities: Vision · Tool Calling · Json Mode
RouteMux name: google/gemini-3.1-flash-lite

Live model playground

Try Gemini 3.1 Flash Lite here

Tune the request, see the current price ceiling, and inspect the real response without leaving this model page.

streamchat

1Configure input

Prompt

0 / 20,000

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Maximum estimated cost—

2Live result

Your result will appear here

Enter an input on the left. The same RouteMux Playground execution and billing path powers this embedded test.

Gemini 3.1 Flash Lite API pricing

Source: gemini_x0.5 · Verified 2026-06-08

InputOfficial $0.25 / M tokens

$0.075/ M tokensSave 70%

OutputOfficial $1.5 / M tokens

$0.45/ M tokensSave 70%

Cache read $0.0075/M · Cache write —/M

Estimate cost

Input tokensOutput tokens

Estimated cost$0.0012

Limited time20% extra Credits on your first top-up — up to 200 bonus Credits

Applies to your first top-up within 72 hours of signing up. Minimum $20, once per account.

Key capabilities

VisionTool CallingJson Mode

Interface and protocols

OpenAI Chat CompletionsStreaming

Use either ID to call this model via the API.

RouteMux namegoogle/gemini-3.1-flash-lite

You can use these names directly in the request model field.

models/gemini-3.1-flash-lite

Replace the ROUTEMUX_KEY placeholder with your API key. Create one →

from openai import OpenAI

client = OpenAI(
    base_url="https://api.routemux.com/v1",
    api_key="<ROUTEMUX_KEY>",
)

completion = client.chat.completions.create(
    model="google/gemini-3.1-flash-lite",
    messages=[{"role": "user", "content": "What is the meaning of life?"}],
)
print(completion.choices[0].message.content)

base_url: https://api.routemux.com/v1

Performance (last 30 days)

0 requests · last 30 days

Total usage35.28M

P50 first-token latencyInsufficient data (0 requests)

Avg throughputInsufficient data (0 requests)

Success rate100.0%

Uptime · 24htested via openai_chat

100.00%

Gemini 3.1 Flash Lite FAQ

›What is Gemini 3.1 Flash Lite?

Gemini 3.1 Flash-Lite — Google's most cost-efficient model for high-volume tasks.

›How large is the context window of Gemini 3.1 Flash Lite?

Gemini 3.1 Flash Lite supports a context window of up to 1M tokens, with up to 66K output tokens per request.

›How much does the Gemini 3.1 Flash Lite API cost?

Through RouteMux, Gemini 3.1 Flash Lite costs $0.075 for input and $0.45 for output (USD per 1M tokens), below the official list price.

›How do I call Gemini 3.1 Flash Lite via API?

Gemini 3.1 Flash Lite is OpenAI-compatible: point your base URL at RouteMux and set the model field to google/gemini-3.1-flash-lite — no code changes needed.

›Which input and output modalities does Gemini 3.1 Flash Lite support?

Gemini 3.1 Flash Lite accepts text, image, audio, video as input and produces text as output.

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