Gemini 3.1 Pro Preview 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; 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 has held the same list price since 2026-08-15 and is the 104th cheapest of 113 models in the Mid-range price tier. None of its 2 hosts undercuts the price we quote. 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): $1.00 / $6.00 per 1M tokens
- Prompt-cache read: $0.20 per 1M tokens
- Context window: 1M tokens
- Arena ELO: 1480 as of 2026-11-08
Available on
Direct API, Google Vertex, OpenRouter
Curated by hand; check with the provider before committing.
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. Its Arena ELO of 1480 ranks 16th of the 160 models that carry one, above 91% of them. With an Arena score of 1480, Gemini 3.1 Pro Preview clears OptimNow's Strong and Standard working quality thresholds: Strong (Arena 1470+), used for support ticket, knowledge Q&A and marketing content; Standard (Arena 1420+), used for meeting summary, invoice processing and call summary. Each threshold is a distance below the best ranked model, which scores 1530 on Arena scores as of 8 Nov 2026.
Licence, size and capabilities
Gemini 3.1 Pro Preview 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 2 different hosts. 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.
The price we quote is already the cheapest of the 2 hosts: Google at $2.00 input / $12.00 output per 1M tokens. All of them charge within 10% of one another.
| Host | Input $/1M | Output $/1M |
|---|---|---|
| Google (model maker, price we quote) | $2.00 | $12.00 |
| Google AI Studio (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 | $1.6K – $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 | $474 – $1.0K |
| Call Summary | 2,000 / 700 | $604 – $1.2K |
| Agent Workflow | 6,000 / 3,000 | $4.0K – $4.8K |
Price history
Gemini 3.1 Pro Preview 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
4 of the 4 comparable models below cost less than Gemini 3.1 Pro Preview: Gemini 3.6 Flash undercuts it by 68%, for 1 Arena point less.
- 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.
The nearest models in the Mid-range price tier on Arena ELO, each with its blended price and score difference against Gemini 3.1 Pro Preview.
- Gemini 3.6 Flash (Google): $0.75 in / $3.75 out per 1M, Arena ELO 1479 (68% cheaper, 1 ELO point lower)
- Muse Spark 1.1 (meta): $1.25 in / $4.25 out per 1M, Arena ELO 1479 (63% cheaper, 1 ELO point lower)
- Gemini 3.5 Flash (Google): $1.50 in / $9.00 out per 1M, Arena ELO 1483 (25% cheaper, 3 ELO points higher)
- Muse Spark 1.2 (meta): $1.25 in / $4.25 out per 1M, Arena ELO 1484 (63% cheaper, 4 ELO points higher)
- Cheapest within 15 Arena points: GLM 5.3 Flash (Zhipu), 99% cheaper, 9 ELO points lower, out of 18 models in that band.
- Highest Arena ELO within 20% of this price: Gemini 4 Argon (Google), 16% cheaper, 50 ELO points higher, out of 15 models in that price band.
Gemini 3.1 Pro Preview head to head
- Claude Opus 5 vs Gemini 3.1 Pro Preview
- GPT-5.5 vs Gemini 3.1 Pro Preview
- Gemini 3.1 Pro Preview vs Gemini 3.5 Flash
Other models from Google
The 8 nearest to Gemini 3.1 Pro Preview 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 Custom Tools: $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 pricing
- How much does Gemini 3.1 Pro Preview cost?
- Gemini 3.1 Pro Preview costs $2.00 per 1M input tokens and $12.00 per 1M output tokens. That is the model maker's own rate (Google). Prices as listed on 2026-11-12.
- Which host is cheapest for Gemini 3.1 Pro Preview?
- The price we quote is already the cheapest of the 2 hosts: Google at $2.00 input / $12.00 output per 1M tokens. All of them charge within 10% of one another. Host rates as listed on 2026-11-12.
- Does Gemini 3.1 Pro Preview offer batch or cached pricing?
- Yes, both. Batch API pricing is $1.00 per 1M input tokens and $6.00 per 1M output tokens, and prompt-cache reads cost $0.20 per 1M tokens, as listed on 2026-11-12.
- What would Gemini 3.1 Pro Preview 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 at the list price quoted on 2026-11-12.
- Can Gemini 3.1 Pro Preview be self-hosted?
- No, as far as this site records. Gemini 3.1 Pro Preview is recorded here as proprietary: access is through an API, priced by the token.
- Has the price of Gemini 3.1 Pro Preview changed?
- Gemini 3.1 Pro Preview 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 batch rate, and that discount is conditional: when the batch discount applies.
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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