Gemini 3.1 Pro Preview
Fast and lightVisionToolsGoogle · 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. Building on the multimodal foundation...
It is part of Google's Gemini and Gemma catalog: Pro tiers lead on capability, Flash tiers on speed and price, and Gemma models are open weight.
Facts and pricing
- Provider
- Context window
- 1.0M tokens
- Input price
- 22.0 credits / 1M tokens ($2.00 raw)
- Output price
- 132 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 1.10x margin. Raw prices shown per 1M tokens.
Try Gemini 3.1 Pro Preview now
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 |
|---|---|---|---|---|
| Nano Banana 2 Lite (Gemini 3.1 Flash Lite Image) | 66K | 2.8 | 16.5 | June 2026 |
| Nano Banana 2 (Gemini 3.1 Flash Image) | 131K | 5.5 | 33.0 | June 2026 |
| Nano Banana Pro (Gemini 3 Pro Image) | 66K | 22.0 | 132 | June 2026 |
| Gemini 3.5 Flash | 1.0M | 16.5 | 99.0 | May 2026 |
| Gemini 3.1 Flash Lite | 1.0M | 2.8 | 16.5 | May 2026 |
| Gemma 4 26B A4B (free) | 262K | 0 | 0 | April 2026 |
| Gemma 4 26B A4B | 262K | 0.66 | 3.6 | April 2026 |
| Gemma 4 31B (free) | 262K | 0 | 0 | April 2026 |
| Gemma 4 31B | 262K | 1.3 | 3.8 | April 2026 |
| Lyria 3 Pro Preview | 1.0M | 0 | 0 | March 2026 |
Compare Gemini 3.1 Pro Preview
- Gemini 3.1 Pro Preview vs GPT-5.6 Sol
- Gemini 3.1 Pro Preview vs Claude Sonnet 5
- Gemini 3.1 Pro Preview vs Claude Opus 4.8
- Gemini 3.1 Pro Preview vs Grok 4.5
- Gemini 3.1 Pro Preview vs DeepSeek V4 Pro
- Gemini 3.1 Pro Preview vs Gemini 3.5 Flash
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. Building on the multimodal foundation...
- How much does Gemini 3.1 Pro Preview cost on Zeplik?
- Input tokens cost 22.0 credits per million and output tokens 132 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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