Gemini 3.1 Pro Preview Custom Tools
Advanced Gemini model for complex reasoning, coding, and multimodal analysis
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
- 11
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
- AIHubMix — model id gemini-3.1-pro-preview-customtools; $2 input / $12 output per 1M tokens; provider documentation
- Databricks — model id databricks-gemini-3-1-pro; $2 input / $12 output per 1M tokens; provider documentation
- Eden AI — model id google/gemini-3.1-pro-preview-customtools; $2 input / $12 output per 1M tokens; provider documentation
- Google — model id gemini-3.1-pro-preview-customtools; $2 input / $12 output per 1M tokens; provider documentation
- Kilo Gateway — model id google/gemini-3.1-pro-preview-customtools; $2 input / $12 output per 1M tokens; provider documentation
- Merge Gateway — model id google/gemini-3.1-pro-preview-customtools; $2 input / $12 output per 1M tokens; provider documentation
- NanoGPT — model id google/gemini-3.1-pro-preview-customtools; $2 input / $12 output per 1M tokens; provider documentation
- Neon — model id gemini-3-1-pro; $2 input / $12 output per 1M tokens; provider documentation
- OpenRouter — model id google/gemini-3.1-pro-preview-customtools; $2 input / $12 output per 1M tokens; provider documentation
- OrcaRouter — model id google/gemini-3.1-pro-preview-customtools; $2 input / $12 output per 1M tokens; provider documentation
- Vertex — model id gemini-3.1-pro-preview-customtools; $2 input / $12 output per 1M tokens; provider documentation