How much does Gemini 3.1 Pro Preview cost on Zeplik?

Input tokens cost 24.0 credits per million and output tokens 144 credits per million (1 credit = $0.10; the raw provider rates are $2.00 and $12.00 per million). New accounts start with free credits.

How long can a conversation with Gemini 3.1 Pro Preview be?

Gemini 3.1 Pro Preview has a 1.0M-token context window (1,048,576 tokens), which covers the conversation plus any documents you attach.

Does Gemini 3.1 Pro Preview support images and tools?

Gemini 3.1 Pro Preview accepts image input and supports tool calling.

Gemini 3.1 Pro Preview

Fast and lightVisionTools

Google · Released February 2026

Gemini 3.1 Pro Preview is Google’s frontier reasoning model, delivering enhanced software engineering performance, improved agentic reliability, and more efficient token usage across complex workflows.

It is part of Google's Gemini and Gemma catalog: Pro tiers lead on capability, Flash tiers on speed and price, Nano Banana covers image generation, and Gemma models are open weight.

Facts and pricing

Provider: Google
Context window: 1.0M tokens
Input price: 24.0 credits / 1M tokens ($2.00 raw)
Output price: 144 credits / 1M tokens ($12.00 raw)
Vision (image input): Yes
Tool calling: Yes
Extended reasoning: No

Credits are what Zeplik bills: 1 credit = $0.10, computed from the raw provider rate with a 1.20x margin. Raw prices shown per 1M tokens.

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What Gemini 3.1 Pro Preview is best for

High-volume everyday tasks where speed and cost matter: summaries, drafts, quick questions
Very long documents and codebases: a 1.0M-token window fits entire books or repositories in one conversation
Working with images: screenshots, charts, photos and scanned documents alongside text
Tool use and agents: reliably calls functions, so it can search, run skills and drive workflows

Example prompts

Prompts that suit a fast and light model like Gemini 3.1 Pro Preview:

Summarize this article in five bullet points
Rewrite this email to be shorter and friendlier
Give me ten name ideas for a hiking newsletter
Translate this paragraph to Spanish and keep the tone

Google family

Model	Context	Input cr/M	Output cr/M	Released
Gemini 4 Argon	1.0M	24.0	120	October 2026
Nano Banana 2.1	66K	18.0	90.0	October 2026
Gemini 3.8 Flash	1.0M	9.0	45.0	September 2026
Gemini 3.8 Flash (batch)	1.0M	4.5	22.5	September 2026
Gemini 3.7 Flash (batch)	1.0M	4.5	22.5	August 2026
Gemini 3.7 Flash	1.0M	9.0	45.0	August 2026
Gemini 3.6 Flash (batch)	1.0M	4.5	22.5	July 2026
Gemini 3.6 Flash	1.0M	9.0	45.0	July 2026
Gemini 3.5 Flash Lite (batch)	1.0M	1.8	15.0	July 2026
Gemini 3.5 Flash Lite	1.0M	3.6	30.0	July 2026

All 40 Google models

Compare Gemini 3.1 Pro Preview

Frequently asked questions

What is Gemini 3.1 Pro Preview?: Gemini 3.1 Pro Preview is an AI model by Google. Gemini 3.1 Pro Preview is Google’s frontier reasoning model, delivering enhanced software engineering performance, improved agentic reliability, and more efficient token usage across complex workflows.
How much does Gemini 3.1 Pro Preview cost on Zeplik?: Input tokens cost 24.0 credits per million and output tokens 144 credits per million (1 credit = $0.10; the raw provider rates are $2.00 and $12.00 per million). New accounts start with free credits.
How long can a conversation with Gemini 3.1 Pro Preview be?: Gemini 3.1 Pro Preview has a 1.0M-token context window (1,048,576 tokens), which covers the conversation plus any documents you attach.
Does Gemini 3.1 Pro Preview support images and tools?: Gemini 3.1 Pro Preview accepts image input and supports tool calling.

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