Google: Gemini 3.1 Pro Preview Custom Tools vs Google: Gemini 3.1 Pro Preview: Complete Comparison 2026
Choosing between Google: Gemini 3.1 Pro Preview Custom Tools and Google: Gemini 3.1 Pro Preview? We compare both tools across features, pricing, pros and cons to help you decide which is the better fit in 2026.
Google · Video & Audio, Chatbots & LLMs
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...
Google · Video & Audio, Chatbots & LLMs
Gemini 3.1 Pro Preview is Google’s frontier reasoning model, delivering enhanced software engineering performance, improved agentic reliability, and more efficient token usage across complex workflows. Building on the multimodal foundation...
Key differences at a glance
- •Both start at $2.00/1M tokens (Google: Gemini 3.1 Pro Preview Custom Tools) and $2.00/1M tokens (Google: Gemini 3.1 Pro Preview).
- •Context windows differ: Google: Gemini 3.1 Pro Preview Custom Tools offers 1,048,756 tokens, Google: Gemini 3.1 Pro Preview offers 1,048,576 tokens.
Side-by-side comparison
| Feature | Google: Gemini 3.1 Pro Preview Custom ToolsGoogle | Google: Gemini 3.1 Pro PreviewGoogle |
|---|---|---|
| Quality score | 9.2 / 10 | 9.2 / 10 |
| Starting price | $2.00/1M tokens | $2.00/1M tokens |
| Free tier | No | No |
| API input price | $2 / 1M tokens | $2 / 1M tokens |
| API output price | $12 / 1M tokens | $12 / 1M tokens |
| Speed | — | — |
| Context window | 1,048,756 tokens | 1,048,576 tokens |
| Categories | Video & Audio, Chatbots & LLMs | Video & Audio, Chatbots & LLMs |
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| Pros | ||
| Cons |
Google: Gemini 3.1 Pro Preview Custom Tools
Choose Google: Gemini 3.1 Pro Preview Custom Tools if you want content creation, research and writing.
Google: Gemini 3.1 Pro Preview
Choose Google: Gemini 3.1 Pro Preview if you want content creation, research and writing.
Pricing comparison
The verdict
Overall, Google: Gemini 3.1 Pro Preview Custom Tools edges ahead with a quality score of 9.2 versus 9.2 for Google: Gemini 3.1 Pro Preview. Choose Google: Gemini 3.1 Pro Preview Custom Tools if you want . That said, Google: Gemini 3.1 Pro Preview is the better pick when matters most — so the right answer depends on your priorities and budget.
Frequently asked questions
Q. Which is better, Google: Gemini 3.1 Pro Preview Custom Tools or Google: Gemini 3.1 Pro Preview?
On our scoring, Google: Gemini 3.1 Pro Preview Custom Tools edges ahead (9.2/10), but the right pick depends on your priorities and budget — see the breakdown above.
Q. Is Google: Gemini 3.1 Pro Preview Custom Tools or Google: Gemini 3.1 Pro Preview cheaper?
Google: Gemini 3.1 Pro Preview Custom Tools starts at $2.00/1M tokens and Google: Gemini 3.1 Pro Preview at $2.00/1M tokens. Check current rates before committing.
Q. Can I use Google: Gemini 3.1 Pro Preview Custom Tools and Google: Gemini 3.1 Pro Preview together?
Yes — many teams use more than one AI tool, picking Google: Gemini 3.1 Pro Preview Custom Tools for some tasks and Google: Gemini 3.1 Pro Preview for others where it's stronger.