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Google DeepMind: Gemini 3.1 Pro

gemini-3-1-pro

Gemini 3.1 Pro is Google DeepMind’s proprietary AI model, released Feb 19, 2026. It scores 156 on the Epoch Capabilities Index. Its strongest use case is reasoning & knowledge, where it ranks in the 83rd percentile of the models Model Beat tracks.

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Input
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Output
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Released
Feb 19, 2026
Modalities
Strongest atReasoning & Knowledge top 17%Agentic & Tools top 37%Math top 40%

Benchmarks

Scores on standardized evaluations. Higher is better — and rank shows where Gemini 3.1 Pro lands among all models tracked on Model Beat.

64.0
Intelligence Index
Epoch AI
64th percentile of tracked models
49.0
Coding Index
Epoch AI
49th percentile of tracked models
63.0
Agentic Index
Epoch AI
63rd percentile of tracked models

Reasoning

7 evals
ARC-AGI98.0%

Abstract visual reasoning

ARC-AGI-277.1%

Harder abstract reasoning

GPQA Diamond94.4%

Graduate-level scientific reasoning

Humanity's Last Exam46.4%

Frontier of human expert knowledge

SimpleBench79.6%

Common-sense trick questions

SimpleQA Verified73.5%

Factual accuracy & hallucination

WeirdML72.1%

Novel ML problem-solving

Coding

3 evals
GSO (code optimization)22.6%

Code performance optimization

SWE-bench Verified75.6%

Real GitHub issue resolution

WebDev Arena1447

Human-rated web development

Math

3 evals
AIME 2024/202595.6%

Olympiad-qualifier math

FrontierMath36.9%

Research-level math problems

FrontierMath Tier 416.7%

Hardest research math

Agentic & Tools

3 evals
APEX35.1%

Multi-step agentic tasks

METR task horizon6.4 h

Autonomous task length

Terminal-Bench80.2%

Command-line agentic tasks

In the news

3

Changelog

1
  • Gemini 3.1 Pro: reported APEX score rose from 33.5% to 35.3% (+5%)benchmark · Oct 16, 2026

Compare Gemini 3.1 Pro with

Frequently asked questions

What is Gemini 3.1 Pro?

Gemini 3.1 Pro is a Gemini-family AI model, from Google DeepMind, released Feb 19, 2026.

Who created Gemini 3.1 Pro?

Gemini 3.1 Pro is an AI model developed by Google DeepMind, part of the Gemini family, released Feb 19, 2026.

How does Gemini 3.1 Pro perform on benchmarks?

On standardized evaluations tracked by Epoch AI, Gemini 3.1 Pro scores 94.4% on GPQA Diamond, 73.5% on SimpleQA Verified, 46.4% on Humanity's Last Exam.

Is Gemini 3.1 Pro open source?

Gemini 3.1 Pro is a proprietary model (API access), available through its provider's API rather than as a downloadable open-weight model.

Benchmark data from Epoch AI (CC BY) and Artificial Analysis; pricing, specs & descriptions from OpenRouter. Data updated Nov 12, 2026.