# Google: Gemini 3.1 Pro Preview

- Model id: `google/gemini-3.1-pro-preview`
- Served by: -
- List price per 1M tokens, input / output, from: -, with 0% platform fee. A request is billed at the list price of the host that served it.
- Context: 1.05M, max output 66K
- Prices read 2026-11-15 09:33 UTC
- Page: https://plaingateway.com/models/google/gemini-3.1-pro-preview

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...

## Hosts

| Host | Endpoint | In / out /M | Cache read /M | Context | Served |
|---|---|---|---|---|---|
| Google Ai Studio | `google-ai-studio/flex` | $1.00 / $6.00 | $0.10 | 1.05M | no |
| Google Vertex | `google-vertex/global/flex` | $1.00 / $6.00 | $0.10 | 1.05M | no |
| Google Ai Studio | `google-ai-studio` | $2.00 / $12.00 | $0.20 | 1.05M | no |
| Google Vertex | `google-vertex/global` | $2.00 / $12.00 | $0.20 | 1.05M | no |
| Google Ai Studio | `google-ai-studio/priority` | $3.60 / $21.60 | $0.36 | 1.05M | no |
| Google Vertex | `google-vertex/global/priority` | $3.60 / $21.60 | $0.36 | 1.05M | no |

## First request

```sh
curl https://api.plaingateway.com/api/v1/chat/completions \
  -H "Authorization: Bearer $PLAINGATEWAY_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model": "google/gemini-3.1-pro-preview", "messages": [{"role": "user", "content": "Say hello in five words."}]}'
```

Sign up at https://plaingateway.com/signup (no card), create a key, send a test call, and add credits when you want more. New accounts may get a small starting credit. The whole bootstrap for agents: https://plaingateway.com/llms.txt