Gemini 3.1 Pro Preview

Name: Gemini 3.1 Pro Preview
Brand: google
SKU: google/gemini-3.1-pro-preview
Price: 2.1 USD
Availability: InStock

google/gemini-3.1-pro-preview

text, image, document, audio in · text out · 200,000 context · 65,536 max output

toolsschemavisionaudioreasoningcacheno-trainShow prices also in

Effective cost per 1k requestsInput tokens 2,000Output tokens 500Cached share 50%

cost = p_in·(input − cached) + p_cache_read·cached + p_out·output + p_req; cached tokens are the prefix a sticky endpoint already holds (part2b §9.3), which is why the cheapest list price is not always the cheapest request.

Provider	Region · quant	Context / max out	Input / M	Output / M	Cache read / write	Markup	Per 1k req	Uptime 30 d	TTFT p50 / p95	Throughput	Last 24 h	Fidelity	Data	Capabilities	Status
OpenRouter	global · unknown	200,000 / 65,536	$2.100	$12.60	$0.210 / $0.394	+5.0%	$8.610	—	—	—	no traffic	—	no-train 30 d	model default	active

Quick start

curl https://api.ai.ml/v1/chat/completions \
  -H "Authorization: Bearer $AIML_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model":"google/gemini-3.1-pro-preview","messages":[{"role":"user","content":"Say hello"}]}'

Get a key in the console

Changelog

new_model model google/gemini-3.1-pro-preview added (active); endpoint ep_openrouter_gemini-3.1-pro-preview_global (google/gemini-3.1-pro-preview) added as active; price input 2.100 output 12.600 USD/M 10/5/2026