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…
Model by Google
Install
Pick your client. Read the repository before you give any tool access to your data.
{
"model": "google/gemini-3.1-pro-preview",
"baseURL": "https://openrouter.ai/api/v1"
}OpenAI-compatible API: point any OpenAI SDK at the base URL and use this model id.
Settings it needs
OPENROUTER_API_KEYrequiredsecret
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About
Use cases: code-generation, model-inference
Reviews
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Price and limits
| Variant | Input $/M tokens | Output $/M tokens | Cached input $/M |
|---|---|---|---|
| Standard | $2 | $12 | $0.2 |
Batch API google/gemini-3.1-pro-preview:batch | $1 | $6 | — |
Price as of Oct 26, 2026 from OpenRouter · provider's own prices: ai.google.dev. Prices change often; check before you rely on one.
- Provider
- Model id
google/gemini-3.1-pro-preview- Context window
- 1,048,576 tokens (1M)
- Max output
- 65,536 tokens
- Input
- audio, file, image, text, video
- Output
- text
- Tool calling
- Yes
- Structured outputs
- Yes
- Reasoning
- Yes
- Weights
- Closed
- Released
- Feb 19, 2026
Details
- Auth
- API key
- License
- Proprietary
- Website
- ai.google.dev
- First seen
- Oct 24, 2026
- Last checked
- Oct 26, 2026
- Source
- OpenRouter
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Cite this page
Gemini 3.1 Pro Preview: price, context window, tool use. Agent Mart. https://agentmart.dev/models/google-gemini-3-1-pro-preview (last updated 2026-10-26)