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: o1
Google: Gemini 3.1 Pro Preview Custom Tools wins on 3 of 6 axes — pricing and capability skew in its favour for most workloads.
The latest and strongest model family from OpenAI, o1 is designed to spend more time thinking before responding. The o1 model series is trained with large-scale reinforcement learning to reason using chain of thought. The o1 models are op…
Model details →Side-by-side comparison
| Capability | Google: Gemini 3.1 Pro Preview Custom Tools | OpenAI: o1 | Winner |
|---|---|---|---|
| Context window Maximum number of input tokens the model can attend to in a single request. | 1.0M | 200K | 🏆 Google: Gemini 3.1 Pro Preview Custom Tools |
| Input price (per 1M) Cost per million input tokens billed by the provider. | $2.00 | $15.00 | 🏆 Google: Gemini 3.1 Pro Preview Custom Tools |
| Output price (per 1M) Cost per million output tokens billed by the provider. | $12.00 | $60.00 | 🏆 Google: Gemini 3.1 Pro Preview Custom Tools |
| Tool / function calling First-class support for emitting structured tool calls. | Yes | Yes | Tie |
| Vision input Accepts image inputs alongside text. | Yes | Yes | Tie |
| Reasoning mode Internal chain-of-thought / extended-thinking support. | Yes | Yes | Tie |
Frequently asked questions
Is Google: Gemini 3.1 Pro Preview Custom Tools better than OpenAI: o1?
Google: Gemini 3.1 Pro Preview Custom Tools wins on 3 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: o1?
Input: $2.00 vs $15.00 per 1M tokens. Output: $12.00 vs $60.00 per 1M tokens.
What context windows do Google: Gemini 3.1 Pro Preview Custom Tools and OpenAI: o1 support?
Google: Gemini 3.1 Pro Preview Custom Tools supports up to 1.0M tokens. OpenAI: o1 supports up to 200K tokens.
Do both Google: Gemini 3.1 Pro Preview Custom Tools and OpenAI: o1 support tool calling?
Google: Gemini 3.1 Pro Preview Custom Tools: yes. OpenAI: o1: yes.