Gemini 3.1 Pro Preview Custom Tools
Google's Gemini 3.1 Pro Preview Custom Tools is designed to improve how an AI model selects and utilizes specific software tools. It supports a wide range of input formats including text, audio, images, video, and files, while featuring advanced reasoning and tool-calling capabilities.
Gemini 3.1 Pro Preview Custom Tools specs and pricing
- Provider: Google
- Released: February 25, 2026
- Context window: 1M tokens
- Max output: 66K tokens
- Input: text, audio, images, video, files
- Output: text
- Price: $2.00 input / $12 output per 1M tokens
- Reasoning: yes
- Tool calling: yes
What Gemini 3.1 Pro Preview Custom Tools is good at
- Complex tasks requiring precise selection of third-party tools
- Analyzing multimodal data like video and audio files
- Automated workflows that rely on external software integration
To-dos to try with Gemini 3.1 Pro Preview Custom Tools
- Analyze this 60-minute video recording and extract the key action items
- Read these five technical documents and use the specific API tool to validate the data
- Review the uploaded audio transcript and generate a summary using the internal database tool
FAQ
- What is the primary purpose of this specific Gemini model? This model is designed to improve tool selection behavior by preventing the unnecessary use of general-purpose tools when more efficient third-party options are available.
- What types of media can this model process? It accepts text, audio, images, video, and various file formats as input.
- How much does Gemini 3.1 Pro Preview Custom Tools cost? Gemini 3.1 Pro Preview Custom Tools costs $2.00 per million input tokens and $12 per million output tokens through OpenRouter. In todo.is a typical agent step costs about 7.28 credits ($1 = 100 credits).
- What is the context window of Gemini 3.1 Pro Preview Custom Tools? Gemini 3.1 Pro Preview Custom Tools can read up to 1M tokens at once and write up to 66K tokens in one reply.
- Can I use Gemini 3.1 Pro Preview Custom Tools without coding? Yes. In todo.is you pick Gemini 3.1 Pro Preview Custom Tools as your agent's model and write to-dos in plain words, on the web, the Android app, WhatsApp or Telegram. No API key needed: credits are included, or you can bring your own key.
JavaScript is required to use the todo.is app.