Overview
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...
Our take
Placed against the broader field of agentic models, this variant occupies a narrow but useful niche: it is a version of Gemini 3.1 Pro tuned specifically to improve tool selection, preventing overuse of a general bash tool when a more efficient third-party tool would serve better. That matters in a workflow where an agent has many tools wired up and you want it reaching for the right one, such as querying a database through a dedicated connector instead of shelling out. It carries a 1,048,756-token context window, chain-of-thought reasoning, image input, and structured JSON output, and is listed as both a video tool and an assistant. Among its stated alternatives, it differs from Gemini Flash Latest or the Flash Lite tier by being a Pro-class reasoner with sharper tool discipline, priced at $2.00 per 1M tokens, which the data marks above average. Ideal for teams building tool-heavy agents who have watched a model default to generic shell commands and want more deliberate tool routing. Pick it when disciplined tool selection is a real pain point in your agent stack; if your setup uses few tools, the plain Pro preview covers the same ground without the specialization.
How Google: Gemini 3.1 Pro Preview Custom Tools stacks up
Among the 64 video & audio tools in our directory, it ranks #1 of 46 on quality (9.2/10), 8% above the 46-tool average of 8.5, and its $2/1M input-token rate is in the premium end — 155% pricier than the 28-model average of $0.78/1M.
Weighing quality against cost, Google: Gemini 3.1 Pro Preview Custom Tools's cost-per-quality-point of $0.22 places it at #22 of 25 for value among video & audio tools.
Google: Gemini 3.1 Pro Preview Custom Tools in depth
Google: Gemini 3.1 Pro Preview Custom Tools, built by Google, sits in the video & audio and chatbots & llms space and is a paid tool starting at $2.00/1M tokens. Our editors rate it 9.2 out of 10 based on capability, ecosystem and value. It handles a context window of 1,048,576 tokens.
On the feature side, Google: Gemini 3.1 Pro Preview Custom Tools brings 1,048,576-token context window, vision (image input), reasoning / chain-of-thought and tool / function calling. These are the capabilities that most shape day-to-day use and separate it from thinner alternatives.
Its biggest strength is large 1,048,576-token context window, bigger than most models listed here, while the main trade-off to weigh is that above-average api pricing ($2 per 1m input tokens). Keep both in mind when deciding whether it fits your workflow.
Google: Gemini 3.1 Pro Preview Custom Tools is most often chosen for content creation, research and writing. If that matches your goals, it's a strong candidate to shortlist.
Key features
- ✓1,048,576-token context window
- ✓Vision (image input)
- ✓Reasoning / chain-of-thought
- ✓Tool / function calling
- ✓Structured (JSON) outputs
Pricing
Pros
- +Large 1,048,576-token context window, bigger than most models listed here
- +Built-in reasoning (chain-of-thought) mode for harder problems
- +Accepts images as input (vision-capable)
- +Supports tool / function calling for agent-style workflows
Cons
- −Above-average API pricing ($2 per 1M input tokens)
Who should use Google: Gemini 3.1 Pro Preview Custom Tools
- →Anyone looking for a video & audio and chatbots & llms tool from Google.
- →Teams and individuals focused on content creation, research and writing.
- →People who value large 1,048,576-token context window, bigger than most models listed here.
- →Workflows that need a 1,048,576 tokens context window.
Who should look elsewhere
- →Anyone who needs a free tier — this tool is paid only.
- →Those for whom above-average api pricing ($2 per 1m input tokens) is a dealbreaker.
Best for
10 Best Google: Gemini 3.1 Pro Preview Custom Tools Alternatives in 2026
Google: Gemini 3.1 Pro Preview Custom Tools is a strong video & audio tool, but it is not the only option. Whether you are after a lower price, different features or a better fit for your workflow, here are the 10 best alternatives to Google: Gemini 3.1 Pro Preview Custom Tools, ranked and compared.
Xiaomi
MiMo-V2.6-Pro-UltraSpeed is the fast speed edition of Xiaomi's flagship foundation model, MiMo-V2.6-Pro.
Xiaomi
MiMo-V2.6-Flash is an open-source foundation model developed by Xiaomi. Built on a Mixture-of-Experts architecture with…
Xiaomi
MiMo-V2.6-Pro is the flagship foundation model developed by Xiaomi. Built at a scale of over 1T parameters, it is…
Qwen
Qwen3.8 Omni Flash is an omni-modal reasoning model from Alibaba, the first Qwen model built around agentic…
Gemini 3.8 Flash is Google's most intelligent Flash model with significant gains from 3.7 Flash across software…
Anthropic
Claude is Anthropic's family of AI assistants, known for long-context reasoning, careful writing and strong coding…
OpenAI
ChatGPT is OpenAI's flagship conversational AI, powering hundreds of millions of weekly users across web, mobile and…
Google DeepMind
Gemini is Google's natively multimodal model family, deeply integrated across Search, Workspace, Android and the Pixel…
Anthropic
Claude Sonnet 5.5 is Anthropic's Sonnet-class model for well-scoped everyday work, succeeding Claude Sonnet 5 as a…
Fireworks
Ember-1 is a specialized reasoning model from Fireworks Research, built on [Kimi…
Google: Gemini 3.1 Pro Preview Custom Tools vs top alternatives
A side-by-side look at how Google: Gemini 3.1 Pro Preview Custom Tools stacks up against its closest rivals.
| Feature | Google: Gemini 3.1 Pro Preview Custom ToolsGoogle | Xiaomi: MiMo-V2.6-Pro-UltraSpeedXiaomi | Xiaomi: MiMo-V2.6-FlashXiaomi | Xiaomi: MiMo-V2.6-ProXiaomi |
|---|---|---|---|---|
| Quality score | 9.2 / 10 | 9.2 / 10 | 9.2 / 10 | 9.2 / 10 |
| Starting price | $2.00/1M tokens | $4.35/1M tokens | $0.14/1M tokens | $0.43/1M tokens |
| Free tier | No | No | No | No |
| API input price | $2 / 1M tokens | $4.35 / 1M tokens | $0.14 / 1M tokens | $0.435 / 1M tokens |
| API output price | $12 / 1M tokens | $8.7 / 1M tokens | $0.28 / 1M tokens | $0.87 / 1M tokens |
| Speed | — | — | — | — |
| Context window | 1,048,576 tokens | 1,048,576 tokens | 1,048,576 tokens | 1,050,000 tokens |
| Categories | Video & Audio, Chatbots & LLMs | Video & Audio, Chatbots & LLMs | Video & Audio, Chatbots & LLMs | Video & Audio, Chatbots & LLMs |
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Frequently asked questions
Q. Is Google: Gemini 3.1 Pro Preview Custom Tools free?
No — Google: Gemini 3.1 Pro Preview Custom Tools is a paid tool, starting at $2.00/1M tokens.
Q. How much does Google: Gemini 3.1 Pro Preview Custom Tools cost?
Google: Gemini 3.1 Pro Preview Custom Tools starts at $2.00/1M tokens. API usage is around $2 per 1M input tokens and $12 per 1M output tokens.
Q. What is Google: Gemini 3.1 Pro Preview Custom Tools best for?
Google: Gemini 3.1 Pro Preview Custom Tools is best suited to content creation, research and writing, within the video & audio and chatbots & llms category.
Q. What are the best Google: Gemini 3.1 Pro Preview Custom Tools alternatives?
Popular alternatives to Google: Gemini 3.1 Pro Preview Custom Tools include Xiaomi: MiMo-V2.6-Pro-UltraSpeed, Xiaomi: MiMo-V2.6-Flash, Xiaomi: MiMo-V2.6-Pro and Qwen: Qwen3.8 Omni Flash. Each trades off price, quality and ecosystem differently.
Q. Is there a free alternative to Google: Gemini 3.1 Pro Preview Custom Tools?
Yes. Claude, ChatGPT, Gemini offer a free tier, making them good starting points if you want to avoid an upfront subscription.
Q. Why switch from Google: Gemini 3.1 Pro Preview Custom Tools?
Common reasons include pricing, specific feature gaps (Above-average API pricing ($2 per 1M input tokens)), data-privacy requirements, or simply wanting a tool that fits your stack better.
How we rate AI tools
Our quality score weighs capability on real tasks, breadth of features and integrations, pricing and value, and how actively the tool is maintained. Scores are editorial guidance, not benchmarks — always trial a tool on your own workflow before committing. Pricing and features change frequently, so verify current details on the official site.
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