--- title: "Google: Gemini 3.1 Pro Preview Custom Tools — unrated, priced in this catalogue · Undominated.ai" canonical: https://undominated.ai/models/google__gemini-3.1-pro-preview-customtools/ description: "Google: Gemini 3.1 Pro Preview Custom Tools: $2.00/M in, $12.00/M out. No independent quality score in this catalogue — unrated, not ranked, not scored zero." --- # Google: Gemini 3.1 Pro Preview Custom Tools — unrated, priced in this catalogue · Undominated.ai > Google: Gemini 3.1 Pro Preview Custom Tools: $2.00/M in, $12.00/M out. No independent quality score in this catalogue — unrated, not ranked, not scored zero. [Check base rates for this workload](/check/google__gemini-3.1-pro-preview-customtools/) [Cheaper alternatives](/alternatives/) [Family](/families/gemini-3/) [Compare models](https://undominated.ai/compare/?models=google%2Fgemini-3.1-pro-preview-customtools) Comparison context Choose up to three standard models in Compare. Requirements and prompt length apply in Compare. This page keeps its stated price basis and workload controls. MODEL PROOF # Gemini 3.1 Pro Preview Custom Tools Google · 25 Feb 2026 Balanced Summarise Chat Code gen Agentic NOT INDEPENDENTLY RATED ## No independent LMArena score is published for this model. **$4.50** / 1M tokens Balanced · 3 tokens in per 1 out Base context tier shown; inspect the complete context ladder below. · Reasoning tokens are billed separately. Evidence as of 06 Oct 2026 [openrouter/models](https://openrouter.ai/api/v1/models) Independent LMArena score Not independently rated Context window 1.05M Maximum output 65.54K Input modalities text, audio, image, video, file Output modalities text Published input price $2.00 / 1M tokens Published output price $12.00 / 1M tokens Pricing kind fixed Context tiers Tiered by context Inspect [complete billing conditions](#billing-details) and endpoint terms below. Price from Google AI Studio: the cheapest offer that is serving, at standard delivery and at the maker’s precision or better, at its standard rate. Every price dimension · USD per million tokens | Input | $2.00 /M | | --- | --- | | Output | $12.00 /M | | Cached input | $0.200 /M | | Cache write | $0.375 /M | | Cache write 1h | Unknown /M | | Reasoning | $12.00 /M | | Web search | $0.014 /call | **The headline rate does not apply to a long-context workload.** Complete context ladder · 1 tier | More than 200,000 tokens | $4.00 /M in (2×) $18.00 /M out $0.400 /M cached input $0.375 /M cache write | | --- | --- | **Reasoning tokens are billed separately** at $12.00/M, on top of output. Its share of your bill depends on the reasoning tokens used. ### Who sells it The same weights, different shops. Cheapest is not like-for-like when serving precision differs. 1 provider offers · rates, limits and conditions Rates are USD per million tokens. Endpoint terms can differ even when the quoted price and precision match. A listed parameter is a provider declaration, not a task-success test. | Seller | Input | Output | Precision | Uptime (1d) | | --- | --- | --- | --- | --- | | Seller Google AI Studio google-ai-studio Endpoint terms Cached input /M $0.200 Context limit 1,048,576 tokens Output limit 65,536 tokens Tools Listed by endpoint Reasoning Listed by endpoint Promotional discount None reported Uptime · last 30 minutes Unknown | Input $2.00 | Output $12.00 | Precision undeclared | Uptime (1d) 99.94% | ### Independent scores No independent benchmark has measured this model. Unrated is not a score of zero. ### Capability | Context window | 1M | | --- | --- | | Max output | 65K | | Input modes | text, audio, image, video, file | | Tool use | yes | | Reasoning | always on | | Open weights | no | ### Provenance | Price source | [openrouter.ai](https://openrouter.ai/api/v1/models) | | --- | --- | | Fetched | 2026-10-06 | | Quality data | unrated | 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... ## Questions this page answers What does Gemini 3.1 Pro Preview Custom Tools cost? $2.00/M in, $12.00/M out in this catalogue, as of the fetch date on this page. That is the API row, not a subscription. Does Gemini 3.1 Pro Preview Custom Tools have an independent quality score? Gemini 3.1 Pro Preview Custom Tools has no independent quality score in this catalogue. Unrated is not a score of zero. What beats Gemini 3.1 Pro Preview Custom Tools? Gemini 3.1 Pro Preview Custom Tools has no independent quality score. Unrated is not a score of zero. Does this page use Artificial Analysis scores for Gemini 3.1 Pro Preview Custom Tools? No. Artificial Analysis figures are not published here. Quality on this page is LMArena Elo where a score exists; otherwise the row is unrated. Does a missing score mean Gemini 3.1 Pro Preview Custom Tools scored zero? Unrated is not a score of zero. MODEL MONUMENT ## Save or share this proof Download proof card · 1200 × 630 Preview and more sharing options Google: Gemini 3.1 Pro Preview Custom Tools. Balanced workload. Not independently rated. Evidence as of 06 Oct 2026. Copy model link Download square card · 1080 × 1080 Copy landscape image Share landscape card ## Related No independent quality score, so there is no dominator to name. Unrated is not a clean bill of health. - Same vendor [Gemini 3.8 Flash](/models/google__gemini-3.8-flash/) - Google models [Google](/providers/google/) - Where this model appears [cliffs](/cliffs/) - Same vendor [Gemini 3.7 Flash](/models/google__gemini-3.7-flash/) - Where this model appears [effort](/effort/) - Same vendor [Gemini 3.1 Pro Preview](/models/google__gemini-3.1-pro-preview/) - Where this model appears [traps](/traps/) - Where this model appears [subscription vs API](/plans/) ## Badge The verdict as one SVG, for a README or a docs page. It states this model's dominance status at the balanced workload on the LMArena lens, with the date it was computed, and it is rebuilt with the catalogue — so it changes when the verdict changes, including to one you would rather it did not. Markdown Copy [![Gemini 3.1 Pro Preview Custom Tools — Undominated.ai dominance verdict](https://undominated.ai/badge/google__gemini-3.1-pro-preview-customtools.svg)](https://undominated.ai/models/google__gemini-3.1-pro-preview-customtools/) HTML Copy Gemini 3.1 Pro Preview Custom Tools — Undominated.ai dominance verdict Direct file: [https://undominated.ai/badge/google__gemini-3.1-pro-preview-customtools.svg](https://undominated.ai/badge/google__gemini-3.1-pro-preview-customtools.svg) — a static SVG, written by scripts/build-badges.mjs on every build, so the copy you embed is never older than the last deploy. ## Continue your investigation - [Explore model families](/families/) - [Compare a shortlist](/compare/) - [Check a model](/check/) - [Understand the evidence](/methodology/)