Google › Gemini 3.1 Pro Preview › Pricing

Gemini 3.1 Pro Preview pricing

API list price by Google · same on Google AI Studio · checked Oct 23, 2026
Benchmarks and alternatives →
$2 / $12per 1M tokens in / out
$0.20cache read · −90%
$1.30per task at thinking?
#83on OpenRouter by tokens · 131B / week

Price sheetper 1M tokens

Input$2list
Output$12
Cache read$0.20−90% vs input
Cache write$0.38−81% vs input
Prompts over 200K$4 / $18in / out
Context · max output1M · 66Ktokens

Where to buy2 providers · per 1M tokens

ProviderInputOutputContext
Googlelab$2$121M
Google AI Studio$2$121M

In Google's line-upper 1M in / out

Gemini 3.8 Flash Cyber$1.50 / $7.50−33%
Gemini 2.5 Pro$1.25 / $10−24%
Gemini 4 Argon$2 / $10−11%
Gemini 3.1 Pro$2 / $120%
Gemini 3.1 Pro Preview$2 / $12this model
Gemini 3.1 Pro Preview Custom Tools$2 / $120%
Gemini Deep Research Agent$2 / $120%
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All Gemini API prices →

Cheaper for the same workvs Gemini 3.1 Pro Preview

GPT-6.1 Sol max-44%score +74%$0.72
GPT-6 Sol max-20%score +60%$1.04
Claude Sonnet 5.5 high-32%score +57%$0.88
MiMo v2.6 Pro thinkingOpen-90%score +56%$0.13
GPT-6 Astra low-37%score +54%$0.82
All alternatives and what breaks when you switch →

Pricing questions

How much does Gemini 3.1 Pro Preview cost?›

$2 per 1M input tokens and $12 per 1M output tokens on Google's API and Google AI Studio. Cached input is $0.20. One Intelligence Index task costs about $1.30 at the default effort.

Is Gemini 3.1 Pro Preview free to use?›

There is no free API tier.

How much does prompt caching save?›

Cache reads cost $0.20 per 1M, 90% below the input price. Writing to the cache costs $0.38 per 1M.

Is Gemini 3.1 Pro Preview cheaper than Gemini 2.5 Pro Preview 06-05?›

No: $2 / $12 against $1.25 / $10, 31% more per token.

What is a cheaper alternative to Gemini 3.1 Pro Preview?›

GPT-6.1 Sol at max effort costs -44% per task with a score +74% on Humanity's Last Exam.