Gemini 3.1 Pro Preview Custom Tools is a variant of Gemini 3.1 Pro that improves tool selection behavior by preventing overuse of a general bash tool when more efficient third-party or user-defined functions are available. This specialized …
Model details →Google: Gemini 3.1 Pro Preview Custom Tools vs OpenAI: GPT Audio Mini
Google: Gemini 3.1 Pro Preview Custom Tools wins on 4 of 6 axes — pricing and capability skew in its favour for most workloads.
A cost-efficient version of GPT Audio. The new snapshot features an upgraded decoder for more natural sounding voices and maintains better voice consistency. Input is priced at $0.60 per million tokens and output is priced at $2.40 per mill…
Model details →Side-by-side comparison
| Capability | Google: Gemini 3.1 Pro Preview Custom Tools | OpenAI: GPT Audio Mini | Winner |
|---|---|---|---|
| Context window Maximum number of input tokens the model can attend to in a single request. | 1.0M | 128K | 🏆 Google: Gemini 3.1 Pro Preview Custom Tools |
| Input price (per 1M) Cost per million input tokens billed by the provider. | $2.00 | $0.60 | 🏆 OpenAI: GPT Audio Mini |
| Output price (per 1M) Cost per million output tokens billed by the provider. | $12.00 | $2.40 | 🏆 OpenAI: GPT Audio Mini |
| Tool / function calling First-class support for emitting structured tool calls. | Yes | — | 🏆 Google: Gemini 3.1 Pro Preview Custom Tools |
| Vision input Accepts image inputs alongside text. | Yes | — | 🏆 Google: Gemini 3.1 Pro Preview Custom Tools |
| Reasoning mode Internal chain-of-thought / extended-thinking support. | Yes | — | 🏆 Google: Gemini 3.1 Pro Preview Custom Tools |
Frequently asked questions
Is Google: Gemini 3.1 Pro Preview Custom Tools better than OpenAI: GPT Audio Mini?
Google: Gemini 3.1 Pro Preview Custom Tools wins on 4 of 6 axes — pricing and capability skew in its favour for most workloads.
What's the price difference between Google: Gemini 3.1 Pro Preview Custom Tools and OpenAI: GPT Audio Mini?
Input: $2.00 vs $0.60 per 1M tokens. Output: $12.00 vs $2.40 per 1M tokens.
What context windows do Google: Gemini 3.1 Pro Preview Custom Tools and OpenAI: GPT Audio Mini support?
Google: Gemini 3.1 Pro Preview Custom Tools supports up to 1.0M tokens. OpenAI: GPT Audio Mini supports up to 128K tokens.
Do both Google: Gemini 3.1 Pro Preview Custom Tools and OpenAI: GPT Audio Mini support tool calling?
Google: Gemini 3.1 Pro Preview Custom Tools: yes. OpenAI: GPT Audio Mini: not advertised.