Google: Gemini 3.1 Pro Preview provider comparison

google/gemini-3.1-pro-preview

Gemini 3.1 Pro Preview is Google’s frontier reasoning model, delivering enhanced software engineering performance, improved agentic reliability, and more efficient token usage across complex workflows. Building on the multimodal foundation...

Endpoints:: 6
Context:: 1M
Input:: audio, file, image, text, video
Output:: text

Compare this model in a set →

At a glance

Comparison winners

Based on 1,000 input and 500 output tokens using the latest published median speed data.

Best cost/speed trade-off

Google AI Studiogoogle-ai-studio

$5.3333 / 1M tokens

7.77 s estimated response

Cheapest

Google Vertexgoogle-vertex/global/flex

$2.6667 / 1M tokens

$0.004 for the sample request

Fastest

Google AI Studiogoogle-ai-studio

7.77 s estimated response

$5.3333 / 1M tokens

Visual comparison

Price and performance charts

Compare published endpoint pricing and estimated response time visually.

Effective price by endpoint

USD per 1 million tokens for input and output. Lower is better.

Google Vertex has the lowest estimated cost for 1,000 input and 500 output tokens at $0.004.

Estimated cost vs. response time

Based on 1,000 input and 500 output tokens. Cost is shown in USD per 1 million tokens. Lower and further left is better; the single best cost/speed trade-off appears at full opacity.

2 providers have complete pricing and speed data. Google AI Studio is closest to the ideal combination of lowest cost and fastest response.

Server-rendered comparison

Provider endpoints

Prompt and completion prices are effective USD per token as published by OpenRouter. Missing speed data never removes an endpoint.

Rank providers by

Endpoint comparison for Google: Gemini 3.1 Pro Preview
Provider / route	Current pricing ↗	Speed measurements	Endpoint details
Provider / route Google Vertex`google-vertex/global`	Current pricing Input price $2 / 1M tokens Output price $12 / 1M tokens Sample cost $0.008	Speed measurements 500-token response 8.71 s Response starts 2.61 s Output speed 82.0 tok/s	Endpoint details Uptime (30 min) 90.99% Context 1M Model format unknown Max output 65.5K 12 parameters include_reasoning, max_tokens, reasoning, reasoning_effort, response_format, seed, stop, structured_outputs, temperature, tool_choice, tools, top_p
Provider / route Google Vertex`google-vertex/global/flex` Cheapest	Current pricing Input price $1 / 1M tokens Output price $6 / 1M tokens Sample cost $0.004	Speed measurements 500-token response Insufficient recent data Response starts Insufficient recent data Output speed Insufficient recent data	Endpoint details Uptime (30 min) 90.99% Context 1M Model format unknown Max output 65.5K 12 parameters include_reasoning, max_tokens, reasoning, reasoning_effort, response_format, seed, stop, structured_outputs, temperature, tool_choice, tools, top_p
Provider / route Google Vertex`google-vertex/global/priority`	Current pricing Input price $3.6 / 1M tokens Output price $21.6 / 1M tokens Sample cost $0.0144	Speed measurements 500-token response Insufficient recent data Response starts Insufficient recent data Output speed Insufficient recent data	Endpoint details Uptime (30 min) 90.99% Context 1M Model format unknown Max output 65.5K 12 parameters include_reasoning, max_tokens, reasoning, reasoning_effort, response_format, seed, stop, structured_outputs, temperature, tool_choice, tools, top_p
Provider / route Google AI Studio`google-ai-studio` FastestBest cost/speed trade-off	Current pricing Input price $2 / 1M tokens Output price $12 / 1M tokens Sample cost $0.008	Speed measurements 500-token response 7.77 s Response starts 2.71 s Output speed 99.0 tok/s	Endpoint details Uptime (30 min) 99.72% Context 1M Model format unknown Max output 65.5K 11 parameters include_reasoning, max_tokens, reasoning, reasoning_effort, response_format, seed, structured_outputs, temperature, tool_choice, tools, top_p
Provider / route Google AI Studio`google-ai-studio/flex`	Current pricing Input price $1 / 1M tokens Output price $6 / 1M tokens Sample cost $0.004	Speed measurements 500-token response Insufficient recent data Response starts Insufficient recent data Output speed Insufficient recent data	Endpoint details Uptime (30 min) 99.72% Context 1M Model format unknown Max output 65.5K 11 parameters include_reasoning, max_tokens, reasoning, reasoning_effort, response_format, seed, structured_outputs, temperature, tool_choice, tools, top_p
Provider / route Google AI Studio`google-ai-studio/priority`	Current pricing Input price $3.6 / 1M tokens Output price $21.6 / 1M tokens Sample cost $0.0144	Speed measurements 500-token response Insufficient recent data Response starts Insufficient recent data Output speed Insufficient recent data	Endpoint details Uptime (30 min) 99.72% Context 1M Model format unknown Max output 65.5K 11 parameters include_reasoning, max_tokens, reasoning, reasoning_effort, response_format, seed, structured_outputs, temperature, tool_choice, tools, top_p

Endpoint data fetched Jul 15, 2026, 11:17 PM UTC.

Gemini 3.1 Pro Preview deployment guide

How to choose a Gemini 3.1 Pro Preview inference provider

Gemini 3.1 Pro Preview is indexed here as a text model by Google, with 6 provider endpoints from Google Vertex, Google AI Studio. The comparison preserves each exact OpenRouter routing tag so pricing and performance observations can be connected to the route an application would actually request.

Match the endpoint to the workload

The model publishes a 1M-token context window. It accepts audio, file, image, text, video input and returns text output. 12 distinct supported parameters appear across the listed routes. Confirm limits on the specific endpoint rather than assuming every host exposes the same configuration.

Compare the real request economics

Google Vertex currently has the lowest estimated cost for the standard 1,000-input/500-output-token sample at $0.004. Input-heavy and output-heavy applications can produce a different result, so review both per-million-token prices in the endpoint table.

Balance response start and generation speed

Google AI Studio currently has the shortest estimated 500-token response at 7.77 seconds. Google AI Studio is the single endpoint closest to the current ideal cost/speed combination. Recent observations can change, so validate finalists with your own prompts.