--- title: "gemini-3.1-pro-preview-customtools Cost Calculator - Vertex AI" description: "Calculate the cost of using gemini-3.1-pro-preview-customtools from Vertex AI. Input costs $2.00 and output $12.00 per 1M tokens." url: "https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/llm-cost-calculator/provider/vertex_ai/model/gemini-3.1-pro-preview-customtools" markdown: "https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/llm-cost-calculator/provider/vertex_ai/model/gemini-3.1-pro-preview-customtools.md" --- # gemini-3.1-pro-preview-customtools Cost Calculator - Vertex AI > Calculate the cost of using gemini-3.1-pro-preview-customtools from Vertex AI. Input costs $2.00 and output $12.00 per 1M tokens. ## Important Links - [View MCP Gateway](https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/resources/mcp-gateway.md) - [Features](https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/#features) - [Enterprise](https://www.getmaxim.ai/enterprise) - [Pricing](https://www.getmaxim.ai/pricing) - [Docs](https://docs.getbifrost.ai) - [GitHub](https://github.com/maximhq/bifrost) - [Book a Demo](https://www.getmaxim.ai/book-a-demo) ## About gemini-3.1-pro-preview-customtools gemini-3.1-pro-preview-customtools is a chat model from Vertex AI, one of 116 chat models they offer. It is priced at $2.00 per 1M input tokens and $12.00 per 1M output tokens, ranking 2508 out of 3254 chat models by cost and cheaper than 20% of models in this category. gemini-3.1-pro-preview-customtools supports vision, function calling, reasoning, audio input, web search, prompt caching, structured output. Its 1,049K-token context window is in the top 10% among chat models. ## Pricing Published Vertex AI pricing for gemini-3.1-pro-preview-customtools. - **$2.00 / 1M tokens Input.** - **$12.00 / 1M tokens Output.** - **$0.0001 / image Output Image.** ## Technical Specifications - **Chat Mode.** - **1,048,576 Max Input Tokens.** - **65,536 Max Output Tokens.** - **65,536 Max Tokens.** ## Model Capabilities gemini-3.1-pro-preview-customtools supports: Function Calling, Vision, Reasoning, Web Search, Audio Input, Video Input, Prompt Caching, System Messages, Response Schema, Tool Choice, PDF Input. ## How Pricing Compares At $2.00 per 1M input tokens and $12.00 per 1M output tokens, gemini-3.1-pro-preview-customtools ranks 2508 out of 3254 chat models by input cost. It is more expensive compared to the median of $0.52 for chat models, and is cheaper than 20% of models in this category. gemini-3.1-pro-preview-customtools is one of 116 Vertex AI chat models, with support for vision, function calling, reasoning, audio input, web search, prompt caching, structured output. its 1,049K-token context window places it in the top 10% of chat models. | Model | Provider | Input $/1M | Output $/1M | vs gemini-3.1-pro-preview-customtools | | --- | --- | --- | --- | --- | | gemini-robotics-er-2-preview | Google Gemini | $2.00 | $10.00 | 0% | | gemini-3-pro-preview | Google Gemini | $2.00 | $12.00 | 0% | | gemini-3.1-pro-preview | Google Gemini | $2.00 | $12.00 | 0% | | gemini-3.1-pro-preview-customtools | Google Gemini | $2.00 | $12.00 | 0% | | gemini-3-pro-preview | OpenRouter | $2.00 | $12.00 | 0% | ## More from Vertex AI - [gemini-3-pro-preview ($2.00/1M input)](https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/llm-cost-calculator/provider/vertex_ai/model/gemini-3-pro-preview.md) - [gemini-3.1-pro-preview ($2.00/1M input)](https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/llm-cost-calculator/provider/vertex_ai/model/gemini-3.1-pro-preview.md) - [jamba-1.5-large ($2.00/1M input)](https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/llm-cost-calculator/provider/vertex_ai/model/jamba-1.5-large.md) - [jamba-1.5-large@001 ($2.00/1M input)](https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/llm-cost-calculator/provider/vertex_ai/model/jamba-1.5-large-001.md) ## Related Resources - [gemini-3.1-pro-preview-customtools specifications](https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/model-library/compare/vertex_ai/gemini-3.1-pro-preview-customtools.md) - [All Vertex AI pricing](https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/llm-cost-calculator/provider/vertex_ai.md) ## FAQ ### Is gemini-3.1-pro-preview-customtools cheaper than gemini-robotics-er-2-preview? No. gemini-3.1-pro-preview-customtools costs $2.00 per 1M input tokens while gemini-robotics-er-2-preview costs $2.00 per 1M input tokens, making gemini-robotics-er-2-preview 0% more affordable for input. However, gemini-3.1-pro-preview-customtools may offer different capabilities or performance characteristics that justify the price difference. ### How does gemini-3.1-pro-preview-customtools pricing compare to the average chat model? gemini-3.1-pro-preview-customtools input pricing is $2.00 per 1M tokens, which is 288% above the median of $0.52 for chat models. It ranks 2508 out of 3254 chat models by input cost, making it cheaper than 20% of models in this category. For output, it costs $12.00 per 1M tokens compared to the median of $1.50. ### What makes gemini-3.1-pro-preview-customtools different from other Vertex AI models? Among Vertex AI's 116 chat models, gemini-3.1-pro-preview-customtools ranks 72 by input cost. ### What are the best alternatives to gemini-3.1-pro-preview-customtools? The most comparable chat models to gemini-3.1-pro-preview-customtools are: gemini-robotics-er-2-preview from Google Gemini ($2.00/1M input tokens); gemini-3-pro-preview from Google Gemini ($2.00/1M input tokens); gemini-3.1-pro-preview from Google Gemini ($2.00/1M input tokens); gemini-3.1-pro-preview-customtools from Google Gemini ($2.00/1M input tokens). These alternatives were selected based on similar capabilities, pricing, and provider diversity. You can compare any of these models in detail using the Bifrost Model Library. ### How large is gemini-3.1-pro-preview-customtools's context window? gemini-3.1-pro-preview-customtools supports up to 1,048,576 input tokens, placing it in the top 10% of chat models by context window size (rank 114 of 3025). This makes it suitable for processing long documents, extensive code repositories, or maintaining detailed conversation histories. ### How do I calculate gemini-3.1-pro-preview-customtools costs? gemini-3.1-pro-preview-customtools is priced based on input and output tokens. Use the interactive calculator at the top of this page to estimate costs for your specific workload. Enter your expected input and output tokens volume and the calculator will show the total cost breakdown. For reference, processing 1M input tokens costs $2.00 and generating 1M output tokens costs $12.00. ## Related Resources - [All Vertex AI pricing](https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/llm-cost-calculator/provider/vertex_ai.md) - [LLM cost calculator](https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/llm-cost-calculator.md) - [Model library](https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/model-library.md) - [Docs: Bifrost docs](https://docs.getbifrost.ai) - [GitHub: maximhq/bifrost](https://github.com/maximhq/bifrost) - [Pricing: Bifrost pricing](https://www.getmaxim.ai/pricing) - [Enterprise: Bifrost enterprise](https://www.getmaxim.ai/enterprise) - [Book a Demo: Bifrost demo](https://www.getmaxim.ai/book-a-demo) - [Resources: Bifrost resources](https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/resources.md) --- *This is a markdown version of [https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/llm-cost-calculator/provider/vertex_ai/model/gemini-3.1-pro-preview-customtools](https://maxim-root-proxy-preview.getmaxim.workers.dev/bifrost/llm-cost-calculator/provider/vertex_ai/model/gemini-3.1-pro-preview-customtools) for AI/LLM consumption.*