Question 1

What is Gemini 3.1 Pro Preview?

Accepted Answer

Gemini 3.1 Pro Preview is a model from Google Gemini AI, released on Feb 19, 2026. Gemini 3 1 Pro is a Google Gemini model for multimodal reasoning, coding, generation, and long-context tasks.

Question 2

How much does Gemini 3.1 Pro Preview cost?

Accepted Answer

On the Respan gateway, input starts at $2.00 per 1M tokens on every provider, and output starts at $12.00 per 1M tokens on every provider, after gateway discounts.

Question 3

Which providers serve Gemini 3.1 Pro Preview on Respan?

Accepted Answer

5 providers serve Gemini 3.1 Pro Preview: DeepInfra, Google Gemini AI, OpenRouter, and Google Vertex AI. Google Vertex AI require your own provider API key (BYOK).

Question 4

What is Gemini 3.1 Pro Preview's context window?

Accepted Answer

Gemini 3.1 Pro Preview accepts up to 1.0M tokens of context on its largest provider route.

Question 5

How do I use Gemini 3.1 Pro Preview with the Respan gateway?

Accepted Answer

Point any OpenAI-compatible SDK at https://api.respan.ai/api/ with your Respan API key and set the model to "gemini/gemini-3.1-pro-preview". To set it up with a coding agent, copy the agent setup prompt at the top of this page.

Question 6

How fast is Gemini 3.1 Pro Preview?

Accepted Answer

Over the last 30 days of requests through the Respan gateway, the fastest provider was Google Gemini AI at 354 tokens per second, and the lowest response latency was 4.2 seconds on OpenRouter. Speed varies with request size and provider.

Provider	Context	Input	Output
DeepInfra`deepinfra/google/gemini-3.1-pro`	1M	$2.00/M	$12.00/M
Google Gemini AI`gemini/gemini-3.1-pro-preview`	1.0M	$2.00/M	$12.00/M
OpenRouter`openrouter/google/gemini-3.1-pro-preview`	1.0M	$2.00/M	$12.00/M
Google Vertex AIBYOK only`vertex_ai_beta/gemini-3.1-pro-preview`	1.0M	$2.00/M	$12.00/M
Google Vertex AIBYOK only`vertex_ai/gemini-3.1-pro-preview`	1.0M	$2.00/M	$12.00/M

Gemini 3.1 Pro Preview

Providers

Certified where it counts.

Pricing

Cost by volume

Throughput and latency

Output speed

Time to first token

Response latency

Apps