When was Google Gemini 3.1 Pro released?

Google Gemini 3.1 Pro was released on 2026-02-19.

What is the context window of Gemini 3.1 Pro?

Gemini 3.1 Pro supports a context window of 2M tokens.

Gemini 3.1 Pro pricing is $2.50 per 1M input tokens and $10.00 per 1M output tokens.

Gemini 3.1 Pro is available via API Only on Google AI Studio, Vertex AI, Gemini API.

Major Release Google LLM Proprietary

Name: Google Gemini 3.1 Pro
Availability: API Only
Author: Google

Google's flagship reasoning model with a 2x jump on hard multi-step tasks.

Released 2026-02-19 · ~1T MoE · 2M tokens context · knowledge cutoff 2025-12

Google's latest flagship model with a major 2x jump in reasoning capabilities

DeveloperGoogle

Release date2026-02-19

Model typeLLM

Parameters~1T MoE

ArchitectureSparse Mixture-of-Experts (MoE)

Context window2M tokens

Max output64K

Knowledge cutoff2025-12

LicenseProprietary

Input modalitiestext, image, audio, video, PDF

Output modalitiestext

Benchmark	Gemini 3.1 Pro	Gemini 3 Pro	Δ
ARC-AGI-2	77.1%	—	—
MMLU	93.8%	93.2%	+0.6
MATH	89.4%	—	—
MMLU-Pro	93.8%	89.4%	+4.4
GPQA Diamond	84.2%	78.5%	+5.7
SWE-bench Verified	72.3%	68.2%	+4.1
LiveCodeBench	78.9%	—	—

$2.50

per 1M input tokens

$10.00

per 1M output tokens

$0.25

per 1M cached input tokens

API Only Google AI Studio Vertex AI Gemini API

Direct comparison available in the model comparison tool →