Long context

Gemini 3.1 Flash Lite API pricing

Google's Gemini series — very long context windows and strong multimodal input.

Model IDgoogle/gemini-3.1-flash-lite

ChatStreamingTool callingVision

Get API Key Run your first request

Call summary

Input

$0.25/ 1M tokens

Cache write $0.25

Cache read $0.25

Output

$1.50/ 1M tokens

Context Window

1.05M

API Endpoints

Gemini 3.1 Flash Lite API endpoints

One API key — this model is served on the endpoint below.

POST/v1/chat/completionsOpenAI-compatible · Works for every model

Chat Completions reference

Call Gemini 3.1 Flash Lite from your code

Your API key works on this endpoint.

Endpoint

/v1/chat/completions

Model ID

google/gemini-3.1-flash-lite

Request example

bash

curl -X POST \
  https://api.router.one/v1/chat/completions \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -d '{
    "model": "google/gemini-3.1-flash-lite",
    "messages": [
      {"role": "user", "content": "Hello!"}
    ]
  }'

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Production reliability

Privacy-safe aggregates from real Router One model calls, so you can assess stability and response latency before integrating.

Successful response share

99.94%

Success 2xx

99.94%

Rate limit 429

0.00%

Server 5xx

0.06%

TPS

245.79

tokens/s

Avg. time to first token

6.51 s

Avg. latency

4.09 s

Includes production requests ending in 2xx, 429, or 5xx. Average latency uses successful requests; time to first token and TPS require complete observations from successful streams. Public thresholds are 100 requests and 5 independent principals.

Updated Oct 20, 2026, 6:21 AM UTC

More Gemini models on Router One

14 other Gemini models on the same gateway and API key — each page lists endpoints, posted price, and context window.

2 channel versions

Gemini 3.8 Flash · Vertex$0.5625 in / $2.8125 out per 1M1.05M context Gemini 4 Argon · Vertex$1.50 in / $7.50 out per 1M1.05M context

Gemini 3.1 Flash Lite compared with other models

Spec and price matchups against peer models.

Gemini 3.5 Flash Lite vs Gemini 3.1 Flash Lite

Gemini 3.1 Flash Lite at a glance

Gemini 3.1 Flash Lite (model ID google/gemini-3.1-flash-lite) is a Gemini-series text model on Router One. google/gemini-3.1-flash-lite is the catalog id without the -preview suffix; google/gemini-3.1-flash-lite-preview is listed separately at its own rate. Posted rate: $0.25 in / $1.50 out per 1M tokens. No Router One subscription plan includes Gemini 3.1 Flash Lite today; every call bills the wallet at its posted rate. Context window: 1.05M tokens. Accepts text, image; returns text. Endpoint: POST /v1/chat/completions (OpenAI-compatible).

Gemini 3.1 Flash Lite FAQ

How much does Gemini 3.1 Flash Lite cost on Router One?

Gemini 3.1 Flash Lite is billed per token on Router One: $0.25 in / $1.50 out per 1M tokens, pay as you go.

Is Gemini 3.1 Flash Lite included in Router One subscriptions?

No Router One subscription plan includes Gemini 3.1 Flash Lite today; every call bills the wallet at its posted rate.

Which endpoints serve Gemini 3.1 Flash Lite?

Gemini 3.1 Flash Lite is served on POST /v1/chat/completions (OpenAI-compatible). Any Router One API key works there.

What is Gemini 3.1 Flash Lite's context window?

Gemini 3.1 Flash Lite accepts up to 1.05M tokens of context per request on Router One.

Start using Gemini 3.1 Flash Lite

Create an API key and call Gemini 3.1 Flash Lite at $0.25 in / $1.50 out per 1M tokens on Router One — pay as you go, with per-request cost and latency visibility.

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