Gemini 3.1 Pro Preview API pricing & cost

Current token rates, context limits, workload examples and unit-economics shortcuts for Gemini 3.1 Pro Preview.

Calculate my workload →Official source ↗

Input / 1M tokens$2

Output / 1M tokens$12

Cached input / 1M$0.2

Context window1M tokens

Pricing page fallback verified September 3, 2026; client checks TokenCOGS live registry on load.

Quick cost examples

What the token rates mean in dollars

Example workload: 2,000 input tokens + 500 output tokens per request, standard text-token pricing.

Volume	Estimated API cost	Approx. / request
1,000 requests	$10.00	$0.01
100,000 requests	$1,000.00	$0.01
1,000,000 requests	$10,000.00	$0.01

Change the token assumptions →

Positioning

Where Gemini 3.1 Pro Preview sits on price

Gemini 3.1 Pro Preview sits toward the highest input-token rate in the current TokenCOGS registry for this provider. Price alone is not a quality ranking, but this position is useful when you are screening models for unit-economics fit before benchmarking latency and quality.

Cost comparison is not a quality, latency or reliability ranking. Benchmark the task you actually need to run.

Compare all Google models →

Cost considerations

What can move the invoice

Cached input is tracked at $0.2 per 1M tokens, which can materially change repeated-system-prompt or repeated-context workloads.
Long-context pricing rules apply above 200,000 input tokens in the current registry. Large-document and agent workloads should model that threshold explicitly.
This model is marked Preview. Preview availability, limits and pricing can change faster than a general-availability model.

Current deals & credits

Ways this provider may reduce spend

Current promotion

50% promotional credit

50% billing credit on Gemini 3.6 / 3.7 Flash

See details ↗

Credits program

Up to $350K in Cloud credits

Google for Startups AI cloud credits

See details ↗

Compare

Nearby Google options

Model	Input / 1M	Output / 1M	Context
Gemini 2.5 Flash-Lite	$0.1	$0.4	Not listed in registry	Calculate
Gemini 3.1 Flash-Lite	$0.25	$1.5	Not listed in registry	Calculate
Gemini 3.5 Flash-Lite	$0.3	$2.5	Not listed in registry	Calculate
Gemini 2.5 Flash	$0.3	$2.5	1M tokens	Calculate
Gemini 3.7 Flash	$0.75	$3.75	1M tokens	View

Use your workload

Turn pricing into unit economics

Cost per userEstimate AI COGS per active customer →Agent costModel multi-step tasks and retries →RAG costAdd retrieval context and vector spend →

FAQ

Gemini 3.1 Pro Preview pricing questions

How much does Gemini 3.1 Pro Preview cost per 1M tokens?

The current TokenCOGS snapshot lists Gemini 3.1 Pro Preview at $2 per 1M input tokens and $12 per 1M output tokens. Live registry data can update these values when the provider changes pricing.

What would 1,000 Gemini 3.1 Pro Preview requests cost?

At 2,000 input tokens and 500 output tokens per request, 1,000 requests are approximately $10.00 before provider-specific extras. Change the workload in the linked calculator for your own usage pattern.

Is Gemini 3.1 Pro Preview the cheapest Google model?