Google: Gemini 3.1 Pro

google/gemini-3.1-pro-preview

Third-generation Pro model built for multimodal understanding, agentic capability, and vibe-coding; improved thinking, token efficiency, and factual grounding over Gemini 3 Pro.

ModalitiesTextImageVideoAudioFileText

In / out price$0.800 / $4.80 per 1M

Context1.05M

ReleasedFeb 1, 2026

Providers

Where this model runs, and what each route costs. Requests are sent to a healthy provider automatically; if one errors, the gateway retries against another serving the same model.

Provider	Input /M	Output /M	Cache read /M	Latency	Throughput
Google	$0.800	$4.80	$0.200	14.56s	225 tps

Capabilities (22)

StreamingTool callingParallel tool callsStructured outputReasoningThinkingSystem promptVisionVideo InputAudio InputPDF inputPrompt cachingCode executionComputer useFile SearchSearch GroundingMaps GroundingUrl ContextBatchFlex InferencePriority InferenceStop sequences

Supported parameters (11)

max_output_tokensstop_sequencesstreamtoolstool_configresponse_mime_typeresponse_schemathinking_levelmedia_resolutionsafety_settingsresponse_format

Any other parameter you send is ignored rather than rejected.

Pricing

What this model costs to run, next to the rate it is posted at. Caching and discounts mean the price actually paid is often below the listed one.

Effective input price

$0.800

/M tokens · listed $2.00

Effective output price

$4.80

/M tokens · listed $12.00

Rate	Listed	Charged	Unit
Input	$2.00	$0.800	per 1M tokens
Output	$12.00	$4.80	per 1M tokens
Cache read	$0.200	$0.200	per 1M tokens
Cache write	$2.00	$2.00	per 1M tokens

UTC

Performance

Throughput is how fast the model writes (tokens per second — higher is better). Latency is total round-trip time (lower is better). TTFT is time-to-first-token — how long before you see anything appear (lower is better). Throughput and TTFT are measured on streaming requests, which are the only ones with a first-token moment to time.

Throughput

225tok/s

P50, streaming requests

Latency

14.56s

P50, end to end

UTC

Throughput

P9915187 tok/s

P956769 tok/s

P50249 tok/s

Latency

P5015.3s

P7523.7s

P9548.1s

P9990.7s

Time to first token

P509492ms

P9531.8s

Cache hit rate

1.07%

Share of input tokens served from the prompt cache over the window.

Availability

The share of requests to this model that completed successfully. When an upstream provider errors, the gateway retries against another provider serving the same model, so a single provider incident does not necessarily show up here.

Success rate (30d)

98.90%

over 92,226 requests

Days with traffic

of the last 30

Days are UTC days. Days with no requests are omitted rather than drawn at 100% — no traffic is not evidence of availability.

Apps

Public apps that send the most traffic to this model. Good signal for what real production workloads look like — and a hint at which use cases this model is best suited for.

1.Oxyy Tester66.9K tokens
2.Agnai.Chat 3.1K tokens

Activity

Token volume and request traffic to this model over time. Daily totals, UTC.

Prompt614.3M

Reasoning5.6M

Completion125.4M

Prompt tokens measure input size. Reasoning tokens show internal thinking before a response. Completion tokens reflect total output length.

Frequently asked questions

What is Gemini 3.1 Pro?

Third-generation Pro model built for multimodal understanding, agentic capability, and vibe-coding; improved thinking, token efficiency, and factual grounding over Gemini 3 Pro.

How much does Gemini 3.1 Pro cost?

Gemini 3.1 Pro costs $2.00 per million input tokens and $12.00 per million output tokens. Cached prompt tokens are billed at $0.200 per million. You pay per request, with no subscription.

What is the context length of Gemini 3.1 Pro?

Gemini 3.1 Pro has a context window of 1,048,576 tokens, and can return up to 65,536 tokens in one response.

Does Gemini 3.1 Pro support tool calling and structured outputs?

Yes — Gemini 3.1 Pro supports both tool calling and structured outputs.

What inputs and outputs does Gemini 3.1 Pro support?

Gemini 3.1 Pro accepts text, image, video, audio, file as input and returns text.

What other models does Google have?

Google also offers Gemini 2.5 Flash, Gemini 2.5 Flash-Lite, Gemini 2.5 Flash TTS, Gemini 2.5 Pro through Oxyy.

When was Gemini 3.1 Pro released?

Gemini 3.1 Pro was released on Feb 1, 2026.

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Provider

Input /M

Output /M

Cache read /M

Latency

Throughput

Google

$0.800

$4.80

$0.200

14.56s

225 tps

Rate

Listed

Charged

Unit

Input

$2.00

$0.800

per 1M tokens

Output

$12.00

$4.80

per 1M tokens

Cache read

$0.200

per 1M tokens

Cache write

$2.00

per 1M tokens