Gemini 3.1 Pro (Preview) (Google Vertex AI)
Reasoning-first Gemini preview for agentic coding and complex problem solving
Model facts
- Context window
- 1.05M tokens
- Maximum output
- 66K tokens
- Cheapest paid input
- $2 per 1M tokens
- Cheapest paid output
- $12 per 1M tokens
- Open weights
- no
- Providers
- 1
Capabilities and modalities
reasoning, tool calling, structured output, attachments, temperature control, text, image, audio, video, pdf.
Observed price history
- 2026-08-24: $2 input / $12 output per 1M tokens
API providers
- LLM Gateway — model id google-vertex/gemini-3.1-pro-preview; $2 input / $12 output per 1M tokens; provider documentation