Gemini 3.1 Pro Preview Custom Tools API pricing
Google · Mid-range price tier · Proprietary · released 2026-02. Prices in USD per 1 million tokens. Data snapshot: 2026-11-12.
A support ticket workload of 100K requests a month costs $900.00 on Gemini 3.1 Pro Preview Custom Tools; the next cheaper model in the Mid-range price tier for this workload, Command A, does it for $875.00. Gemini 3.1 Pro Preview Custom Tools has held the same list price since 2026-08-15 and is the 104th cheapest of 113 models in the Mid-range price tier. Only one host, Google AI Studio, sells it, so there is no second price to shop. Its name marks it as a preview, beta or experimental release, so both the model and its price are provisional.
- Input: $2.00 per 1M tokens
- Output: $12.00 per 1M tokens
- Batch API (in/out): Not published
- Prompt-cache read: $0.20 per 1M tokens
- Context window: 1M tokens
- Arena ELO: Not published
Market position
On blended price ($9.00 per 1M tokens at 30% input, 70% output) it is cheaper than 5% of models in the Mid-range price tier: 104th cheapest of 113, tied with 3 others. Across every price tier it is cheaper than 12% of priced text models in the catalogue: 264th cheapest of 303, tied with 3 others. No Arena score has been published for Gemini 3.1 Pro Preview Custom Tools, so this page does not rank it on quality and OptimNow's quality bars do not apply to it. 66 of the 113 models we list in the Mid-range price tier carry one. An unranked model is unmeasured, not poor: the benchmark needs votes, and a recent release has not had time to collect them.
Licence, size and capabilities
Gemini 3.1 Pro Preview Custom Tools is recorded here as proprietary: access is through an API, priced by the token. Its parameter count is not published. Listed capabilities: Text, Vision, Audio, Reasoning, Agents. Filling its 1M context window once costs $2.00 in input tokens at list price.
Pricing by host
A host is a company that runs the model and sells it by the token: the model maker, a cloud platform like Amazon Bedrock, Azure or Vertex, or an independent host. One model, several hosts, and often several prices. This model is sold by 1 host. The price we quote elsewhere on this page is marked. We quote one host's rate so that models stay comparable; it is not a recommendation to buy there.
Google AI Studio is the only host with a published rate, $2.00 input / $12.00 output per 1M tokens, which is the price we quote.
| Host | Input $/1M | Output $/1M |
|---|---|---|
| Google AI Studio (model maker, price we quote) | $2.00 | $12.00 |
List prices as published on 2026-11-12, via OpenRouter. Negotiated rates, committed-use discounts and provisioned capacity are not shown.
Monthly cost at 100K requests, by business use case
From the after-discounts figure (prompt caching on the cached input share, batch API for async workloads, only where Google publishes those rates), which assumes you implement both, to the list price. One figure means no discount is published.
| Use case | Tokens (in/out) | Monthly (after discounts – list) |
|---|---|---|
| Support Ticket | 1,500 / 500 | $738 – $900 |
| Knowledge Q&A | 2,000 / 800 | $1.1K – $1.4K |
| Meeting Summary | 10,000 / 1,200 | $3.3K – $3.4K |
| Marketing Content | 2,500 / 1,800 | $2.6K – $2.7K |
| Coding Task | 3,000 / 2,000 | $2.7K – $3.0K |
| Invoice Processing | 1,500 / 600 | $939 – $1.0K |
| Call Summary | 2,000 / 700 | $1.2K |
| Agent Workflow | 6,000 / 3,000 | $4.0K – $4.8K |
Price history
Gemini 3.1 Pro Preview Custom Tools has been in our daily price archive since tracking began on 2026-08-15, when it listed at $2.00 input / $12.00 output per 1M tokens. No list price change since tracking began on 2026-08-15. Last checked against the 2026-11-12 snapshot.
Alternatives to Gemini 3.1 Pro Preview Custom Tools
Gemini 3.1 Pro Preview Custom Tools carries no Arena score, so this page cannot place it against models of comparable quality. The alternatives below are its nearest neighbours on price in the Mid-range price tier.
- Next cheaper model in the Mid-range price tier: Command A (Cohere) at $7.75 blended, 14% less.
- Next more expensive: Nova Premier 1.0 (Amazon) at $9.50 blended, 6% more.
Other models from Google
The 8 nearest to Gemini 3.1 Pro Preview Custom Tools in price, of 27 other Google models in the catalogue. Prices per 1M tokens, input then output.
- Gemini Omni 1.1 Flash: $1.50 / $9.00
- Gemini Omni 1.2 Flash: $1.50 / $9.00
- Gemini 2.5 Pro: $1.25 / $10.00
- Gemini 2.5 Pro Preview: $1.25 / $10.00
- Gemini 4 Argon: $2.00 / $10.00
- Gemini 4 Carbon: $2.00 / $10.00
- Gemini 3.1 Pro Preview: $2.00 / $12.00
- Nano Banana Pro (Gemini 3 Pro Image): $2.00 / $12.00
All 28 Google models and prices
Common questions about Gemini 3.1 Pro Preview Custom Tools pricing
- How much does Gemini 3.1 Pro Preview Custom Tools cost?
- Gemini 3.1 Pro Preview Custom Tools costs $2.00 per 1M input tokens and $12.00 per 1M output tokens. That is the model maker's own rate (Google AI Studio). Prices as listed on 2026-11-12.
- Which host is cheapest for Gemini 3.1 Pro Preview Custom Tools?
- Google AI Studio is the only host with a published rate, $2.00 input / $12.00 output per 1M tokens, which is the price we quote. Host rates as listed on 2026-11-12.
- Does Gemini 3.1 Pro Preview Custom Tools offer batch or cached pricing?
- Yes, for prompt caching only. Cache reads cost $0.20 per 1M tokens, as listed on 2026-11-12. No batch pricing is published.
- What would Gemini 3.1 Pro Preview Custom Tools cost per month?
- With the Support Ticket profile (1,500 input and 500 output tokens per request), 100,000 requests a month cost about $900 on Gemini 3.1 Pro Preview Custom Tools at the list price quoted on 2026-11-12.
- Can Gemini 3.1 Pro Preview Custom Tools be self-hosted?
- No, as far as this site records. Gemini 3.1 Pro Preview Custom Tools is recorded here as proprietary: access is through an API, priced by the token.
- Has the price of Gemini 3.1 Pro Preview Custom Tools changed?
- Gemini 3.1 Pro Preview Custom Tools has been in our daily price archive since tracking began on 2026-08-15, when it listed at $2.00 input / $12.00 output per 1M tokens. No list price change since tracking began on 2026-08-15. Last checked against the 2026-11-12 snapshot.
It publishes a prompt-cache rate, which is the discount most often left out of a budget: what prompt caching saves.
These are list prices. Your real cost also depends on caching and batching, negotiated discounts, marketplace agreements, and the contracts you already have. OptimNow audits exactly that.
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