// google

Gemini 3.1 Pro Preview

google/gemini-3.1-pro-preview

reasoningtool callingaudio inputfile inputimage inputvideo inputprompt caching
OpenRouter + LiveBenchAll modelsFull leaderboard

Gemini 3.1 Pro Preview costs $2.00 per 1M input tokens and $12.00 per 1M output tokens with a 1.0M-token context window.

A reasoning, tool-calling model from google, released Feb 19, 2026. On LiveBench it scores 77.0 overall — #19 of 55 benchmarked models — and ranks highest in instruction following (#3).

Input / 1M
$2.00
Output / 1M
$12.00
Context
1.0M
LiveBench overall
77.0 · #19

Specs and pricing

Input price

USD per 1M prompt tokens

$2.00
Output price

USD per 1M completion tokens, reasoning included

$12.00
Blended price

3:1 input:output — #41 most expensive of 343 listed models

$4.50
Cached input read

Blank means not priced separately — not free

$0.200
Cache write$0.375
Context window1,048,576 tokens
Max output65,536 tokens
Input modalitiesaudio, file, image, text, video
Tool callingYes
Extended reasoningYes
Knowledge cutoff
ListedFeb 19, 2026
All Google API pricing

Also listed as google/gemini-3.1-pro-preview:batch ($2.25 blended)— the same model at a different price or rate limit.

Benchmarks by category

LiveBench scores out of 100, with Gemini 3.1 Pro Preview's rank among the 55 benchmarked models listed here. Run: gemini-3.1-pro-preview-high.

Overall#19 of 55
77.0

$0.1567 measured per point

44.1

$0.7107 measured per point

Coding#36 of 55
76.5

$0.0592 measured per point

Reasoning#31 of 55
84.0

$0.0892 measured per point

Mathematics#23 of 55
91.0

$0.1781 measured per point

Data analysis#16 of 55
78.5

$0.1652 measured per point

Language#11 of 55
85.4

$0.0571 measured per point

79.1

$0.0881 measured per point

What Gemini 3.1 Pro Preview 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

$1,310/mo
RAG assistant

8K in / 600 out × 100K requests

$1,600/mo
Coding agent

40K in / 4K out × 20K requests

$1,552/mo
Document extraction

20K in / 1.5K out × 50K requests

$2,810/mo
Bulk classification

500 in / 20 out × 5M requests

$5,300/mo
Price your own workload

Compare Gemini 3.1 Pro Preview with

The benchmarked models closest to it on overall score.

Gemini 3.1 Pro Preview FAQ

How much does Gemini 3.1 Pro Preview cost?

Gemini 3.1 Pro Preview lists at $2.00 per 1M input tokens and $12.00 per 1M output tokens, with cached input reads at $0.200 per 1M. A RAG assistant handling 100K requests a month (8K tokens in, 600 out) comes to about $1,600 at list price.

What is the context window of Gemini 3.1 Pro Preview?

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

Does Gemini 3.1 Pro Preview support tool calling?

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

How does Gemini 3.1 Pro Preview score on benchmarks?

On LiveBench release 2026-06-25 (run: gemini-3.1-pro-preview-high), Gemini 3.1 Pro Preview scores 77.0 overall, ranking #19 of 55 benchmarked models.

What is the API model ID for Gemini 3.1 Pro Preview?

On OpenRouter the model ID is "google/gemini-3.1-pro-preview". It was listed on Feb 19, 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.