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Gemini 3.1 Pro Preview Custom Tools

Google official pay-as-you-go API pricing and cost estimates

Googlegemini-3.1-pro-preview-customtools

Official Pricing Breakdown

Estimate Monthly Cost
Standard pricing · USDBilling Unit: 1M tokens

Input Price

US$ 2.00

Output Price

US$ 12.00

Cached Input

US$ 0.20

Same Paid Standard rates as gemini-3.1-pro-preview for prompts ≤200k: input $2 / output $12 / cache $0.20; >200k long-context surcharge excluded as duplicate. Custom Tools endpoint; Contributor Tier invite-only pricing not used.

Official Source(opens in a new tab)

Technical Specifications

Context Window
—
Not cataloged
Release Date
Not cataloged
Official announcement date
Spec Source & Verification
Spec not independently verified
About spec verification▼

Context window specifications are provided for reference only and are not part of pricing verification. Actual rates are governed by official vendor documentation and verified timestamps.

API Cost Estimator

Estimated from daily requests & average token volume (per 1M tokens · Standard pricing · USD)

Presets:
Projected Monthly Cost
US$ 222.72/ mo
Daily Requests
11K10K100K1M
Avg Input Tokens / Request
04K32K128K2M
Avg Output Tokens / Request
02K8K32K128K
Prompt Cache Hit Rate (20%)▼

Cached tokens are included within average input tokens, not an additional amount. Presets provide typical hit rates.

0%25%50%75%100%
Monthly Cost Breakdown
Monthly Cost DistributionInput: 34% · Cache Hit: 1% · Output: 65%
Base Input Cost (uncached): US$ 76.80
Cache Hit Input Cost (Monthly): US$ 1.92
Output Subtotal (Monthly): US$ 144.00
Cache Savings: US$ 17.28

Estimates are based on current public list rates and do not account for retries, rate limits, or enterprise discounts. Reasoning tokens are excluded if billed separately.

Related Subscription Plans
Google AI Plus
Individual · Billing Cycle: Yearly · App Store (83 regions)
83 regions
Google AI Plus
Individual · Billing Cycle: Monthly · United States
US$ 4.99 / mo
Google AI Pro
Individual · Billing Cycle: Monthly · United States
US$ 19.99 / mo
Google AI Pro
Individual · Billing Cycle: Yearly · App Store (3 regions)
3 regions
Google AI Ultra 20x
Individual · Billing Cycle: Monthly · United States
US$ 199.99 / mo
Google AI Ultra 5x
Individual · Billing Cycle: Monthly · United States
US$ 99.99 / mo

Price Change History

  • New Addition

    Gemini 3.1 Pro Preview Custom Tools (API)

    English translation pending. Check the official source for pricing conditions.

    Read original note (Chinese)

    核对官方定价后首次收录 API 基础报价

    Recorded: 2026/11/02 17:58
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