Gemini 3.1 Pro Preview
by Vertex · family gemini-pro · listed Feb 2026RTV
Reasoning-first Gemini preview for agentic coding and complex problem solving
Current rates USD per 1M tokens
Input$2.00
Output$12.00
Cache read$0.20
Cache write—
Against the market
On the record
- Model id
gemini-3.1-pro-preview- Context window
- 1.0M tokens
- Max output
- 66K tokens
- Input modalities
- text, image, video, audio, pdf
- Output modalities
- text
- Reasoning
- yes
- Tool calls
- yes
- Open weights
- no
- Knowledge cutoff
- Jan 2025
- Released
- 2026-02-19
- Last updated
- 2026-02-19
- Provider docs
- cloud.google.com/vertex-ai/generative-ai/docs/models
Back of the envelope
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