Compare AI models

Specifications
Context windowHow much text the model can hold in mind at once — your question, any documents you attach, the conversation so far, and its own reply. Go past it and the earliest part falls out of view.
—128k
API pricingUSD per 1M tokens · lower wins · base tier
Input priceWhat you pay for everything you send the model — your question, plus any documents or earlier conversation you include with it.
$2.00$0.15
Output priceWhat you pay for the text the model writes back. It is normally the dearer half: producing an answer costs more than reading one.
$12.00$0.60
Cached input priceA reduced rate for text you send over and over. If every request starts with the same instructions or the same document, the provider keeps a copy ready and charges less to read it again.
$0.20$0.075
Cheapest inputLowest input rate across every provider on OpenRouter, the lab included. The cheapest endpoint may run a quantised build or a shorter context — see "Available from" on the model page.
$1.00Google$0.15Azure
Cheapest outputLowest output rate across every provider on OpenRouter, the lab included. May come from a different provider than the cheapest input.
$6.00Google$0.60Azure
$1,000Google list price$60.00OpenAI list price
Benchmarks
BullshitBench v2Nonsense detection — Given a confidently-worded but nonsensical prompt, does the AI spot that it makes no sense and push back — instead of playing along and inventing an answer? The score is how often it clearly called out the nonsense. Higher is better.
37%2%
GPQA DiamondScience — Graduate-level science questions in biology, physics, and chemistry — hard enough that subject-matter PhDs score around 65%. Higher is better.
94.3%40.2%
Overview
CompanyGoogleOpenAI
Release dateFeb 19 2026Jul 18 2024
AccessClosedClosed
Model detailsView modelView model

Frequently asked questions

Gemini 3.1 Pro leads GPT-4o mini on 2 of the 2 benchmarks they both report (BullshitBench v2, GPQA Diamond). GPT-4o mini is cheaper on both input and output: $0.15 vs $2.00 per million input tokens, and $0.60 vs $12.00 per million output tokens. Figures are base-tier rates. GPT-4o mini shipped 581 days before Gemini 3.1 Pro, so benchmark comparisons should account for the intervening progress.

Published specifications for these two models are limited — see each model page for the latest details.

On BullshitBench v2, Gemini 3.1 Pro leads at 37% vs GPT-4o mini at 2%. On GPQA Diamond, Gemini 3.1 Pro leads at 94.3% vs GPT-4o mini at 40.2%.