gemini-3.1-pro-preview-customtools

For developers building agentic workflows, the biggest friction point is often 'tool hallucination' or inefficient routing—where a model defaults to a heavy-handed general bash execution instead of using a specialized API. Gemini 3.1 Pro Preview Custom Tools addresses this specific orchestration challenge. This variant is fine-tuned to optimize tool selection logic, ensuring the model intelligently prioritizes lightweight, high-precision third-party tools over generic terminal commands when appropriate. With a massive 1M token context window, it remains highly capable of complex reasoning and long-context retrieval, but with a significantly more disciplined approach to function calling. It is ideal for developers integrating autonomous agents into production environments where execution efficiency, cost-control, and precise tool routing are critical requirements. If your current agentic loops are getting bogged down by unnecessary shell executions, this specialized preview offers a more streamlined path to reliable tool-use autonomy.