All Google models

Gemini 3.1 Pro Preview

Google · released 6 months ago

Gemini 3.1 Pro Preview is a Google model with a 1.05M token context window — about 1,500 pages of text. It reads Audio, Files, Images, Text, and Video and replies in Text. It can show its reasoning before it answers.

$2.30

input / 1M tokens

$13.80

output / 1M tokens

1.05M

context — about 1,500 pages

2.3¢

a client proposal

Pricing

Input
$2.30 per million tokens
Output
$13.80 per million tokens
Cached input
$0.230 per million tokens
Cache writes
$0.431 per million tokens
Web search
1.6¢ per search
Long-context rate (over 200K)
$4.60 in · $20.70 out, per million tokens

Billed from your Alyph wallet. Prices can change when the provider changes theirs — last checked August 9, 2026.

The numbers

Provider
Google
Released
6 months ago (2026-02-19)
Context window
1.05M tokens — about 1,500 pages
Max output
66K tokens per reply
Input
Audio, Files, Images, Text, and Video
Output
Text
Reasoning
Shows its thinking before answering

Cost vs Token Amount

Drag the slider to adjust the split between input and output workload.

80% Input20% Output
free$3.91$7.820 tokens250k500k750k1000k
Gemini 3.1 Pro Preview

Adjust the ratio slider to change how output tokens influence the final price for equivalent workloads.

What a task costs

2K tokens in · 500 tokens out.

Gemini 3.1 Pro Preview

Google

1.1¢

for this task

40% input · 60% output

Full pricing →

Your $5 welcome credit covers about 434 of these.

Compare Gemini 3.1 Pro Preview

Closest in price on a typical task:

Gemini 3.1 Pro Preview vs Gemini 3.1 Pro Preview Custom Tools →Gemini 3.1 Pro Preview vs Nano Banana Pro (Gemini 3 Pro Image Preview) →Gemini 3.1 Pro Preview vs Nano Banana Pro (Gemini 3 Pro Image) →Gemini 3.1 Pro Preview vs Aion-3.0 →Any other combination →

Questions, answered

How much does Gemini 3.1 Pro Preview cost on Alyph?

Gemini 3.1 Pro Preview costs $2.30 per million input tokens and $13.80 per million output tokens on Alyph. A typical task — 5K tokens in, 800 out — works out to about 2.3¢. Billed from your Alyph wallet, with hard spending limits. Prices can change when the provider changes theirs; this page was last checked on August 9, 2026.

What is Gemini 3.1 Pro Preview's context window?

1.05M tokens — about 1,500 pages. Replies can be up to 66K tokens long. Prompts longer than 200K tokens are billed at the long-context rate.

Can Gemini 3.1 Pro Preview read images and files?

Gemini 3.1 Pro Preview reads Audio, Files, Images, Text, and Video. Drop a file onto the canvas and it becomes part of the context — the only limit is the context window.

Does Gemini 3.1 Pro Preview show its reasoning?

Yes. Gemini 3.1 Pro Preview can expose its thinking before the final answer, so you can watch how it got there.

Test Gemini 3.1 Pro Preview against Gemini 3.1 Pro Preview Custom Tools

One prompt, both models at the same time, the better answer wins. Free to start, with $5 of credit.

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