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 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...

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

2 providers serve Gemini 3.1 Pro Preview: Inference.net and Perplexity. Perplexity requires 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-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 Inference.net at 10 tokens per second, and the lowest response latency was 2.9 seconds on Inference.net. Speed varies with request size and provider.

Question 7

Where does Gemini 3.1 Pro Preview rank on the Respan Index?

Accepted Answer

Gemini 3.1 Pro Preview scores 41.4 out of 100 on the Respan Index v1.1, ranking #42 of 138 models. By category: Coding 15.6, Agents 52.1, Reasoning 37.8, Knowledge & language 72.9, and Human preference 51.6. The Respan Index combines independent and lab-reported benchmark results into one score, using benchmark data collected by llmmetric.com.

Question 8

How does Gemini 3.1 Pro Preview score on benchmarks?

Accepted Answer

Gemini 3.1 Pro Preview has 40 published benchmark scores, including LiveBench Coding 76.5%, Toolathlon-Verified 61.1%, and GPQA Diamond 94.4%. Each score links to where it was published; the data is collected by llmmetric.com.

Provider	Context	Input	Output	Capabilities
Inference.net`inference_net/gemini-3.1-pro-preview`	1.0M	$2.00/M	$12.00/M
PerplexityBYOK only`perplexity/google/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

Response latency

Benchmarks

Respan Indexv1.1

Coding8

Apps