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 Perplexity: Sonar Reasoning Pro
Google: Gemini 3.1 Pro Preview Custom Tools wins on 2 of 6 axes — pricing and capability skew in its favour for most workloads.
Note: Sonar Pro pricing includes Perplexity search pricing. See [details here](https://docs.perplexity.ai/guides/pricing#detailed-pricing-breakdown-for-sonar-reasoning-pro-and-sonar-pro) Sonar Reasoning Pro is a premier reasoning model pow…
Model details →Side-by-side comparison
| Capability | Google: Gemini 3.1 Pro Preview Custom Tools | Perplexity: Sonar Reasoning Pro | 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 | $2.00 | Tie |
| Output price (per 1M) Cost per million output tokens billed by the provider. | $12.00 | $8.00 | 🏆 Perplexity: Sonar Reasoning Pro |
| 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 | 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 Perplexity: Sonar Reasoning Pro?
Google: Gemini 3.1 Pro Preview Custom Tools wins on 2 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 Perplexity: Sonar Reasoning Pro?
Input: $2.00 vs $2.00 per 1M tokens. Output: $12.00 vs $8.00 per 1M tokens.
What context windows do Google: Gemini 3.1 Pro Preview Custom Tools and Perplexity: Sonar Reasoning Pro support?
Google: Gemini 3.1 Pro Preview Custom Tools supports up to 1.0M tokens. Perplexity: Sonar Reasoning Pro supports up to 128K tokens.
Do both Google: Gemini 3.1 Pro Preview Custom Tools and Perplexity: Sonar Reasoning Pro support tool calling?
Google: Gemini 3.1 Pro Preview Custom Tools: yes. Perplexity: Sonar Reasoning Pro: not advertised.