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Gemini 3.1 Pro vs GPT-4o

The readout for Gemini 3.1 Pro and GPT-4o, before the detailed comparison sheet.

Model A

Gemini 3.1 Pro

Google

Leading
vs

Model B

GPT-4o

OpenAI

Contender

Key Takeaways

Weighted outcome: Gemini 3.1 Pro. Benchmark capability categories carry 80%, while price, API performance, and availability carry 20%.

Decision read

Gemini 3.1 Pro

Gemini 3.1 Pro has the higher weighted result; Model A / B score 92 to 8.

Evidence depth

89 data points

Includes 12 benchmark rows, 0 audit samples, and 10 provider examples.

Selection signal

Start with Gemini 3.1 Pro

The charts below split 22 high-signal samples across speed, scores, and audit health.

Change comparison

Switch either side of this report to compare another model with the same LMSpeed data pipeline.

Select a different model to open a new comparison URL.

Comparison sheet

This report only uses LMSpeed data for Gemini 3.1 Pro and GPT-4o: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.

Model compare
Gemini 3.1 Pro
GPT-4o
Overall leaderLeadingContender
Weighted overall score92.0 pts8.0 pts
Benchmark category leads6 categories0 categories
Operational advantagesAverage speed, Free providers, Provider coverageCheapest input price, First-token latency
Context window1.0M tokens128K tokens
Max output65.5K tokens16.4K tokens
Modalities

Input

AudioFileImageTextvideo

Output

Text

Input

TextImageFile

Output

Text
Features
Text inputImage inputFile inputAudio inputText outputTool callingStructured outputsJSON modeReasoning
Text inputImage inputFile inputText outputTool callingStructured outputsJSON modeWeb search

The overall result weights benchmark capability categories at 80% and price, API speed/latency, and availability at 20%. Recent test volume does not affect the winner, and missing benchmark categories are excluded.

Model metadata

Model compare
Gemini 3.1 Pro
GPT-4o
DeveloperGoogleOpenAI
ReleasedFeb 2026Nov 2024
ParametersNo dataNo data
TokenizerGeminiGPT
Knowledge cutoffNo data2023-10-31
OpenRouter IDgoogle/gemini-3.1-pro-previewopenai/gpt-4o
ReferencesNo dataNo data

When to choose each model

This report only uses LMSpeed data for Gemini 3.1 Pro and GPT-4o: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.

Gemini 3.1 Pro

Gemini 3.1 Pro is stronger in benchmark categories (Agents, Coding, Reasoning, Knowledge, Math) and operational dimensions (Average speed, Free providers, Provider coverage).

GPT-4o

GPT-4o has these operational advantages: Cheapest input price, First-token latency.

Benchmark score comparison

Third-party benchmark profile synced into LMSpeed; only metrics available for both models are shown.

Category performance

Compare benchmark category scores on a 0-100 scale. Select a category to inspect the gap.

Model A coverage
8 / 8
Model B coverage
6 / 8
Shared
6 shared categories

Avg. score

Gemini 3.1 Pro

57

Avg. score

GPT-4o

42.4

Agents

Gemini 3.1 Pro leads by 11.6

Gemini 3.1 Pro50.2
GPT-4o38.6

Coding

Gemini 3.1 Pro leads by 13.8

Gemini 3.1 Pro57.2
GPT-4o43.4

Reasoning

Gemini 3.1 Pro leads by 17.5

Gemini 3.1 Pro57.4
GPT-4o39.9

Knowledge

Gemini 3.1 Pro leads by 8.2

Gemini 3.1 Pro57
GPT-4o48.8

Math

Gemini 3.1 Pro leads by 12.4

Gemini 3.1 Pro54.6
GPT-4o42.2

Multilingual

Gemini 3.1 Pro

Gemini 3.1 Pro69.3
GPT-4o-

Multimodal

Gemini 3.1 Pro

Gemini 3.1 Pro55.1
GPT-4o-

Instruction following

Gemini 3.1 Pro leads by 13.6

Gemini 3.1 Pro55.3
GPT-4o41.7

Professional benchmark details

Metric-level scores with benchmark source, rank depth, confidence, error, and evaluation date where available.

Aggregatereported

BenchLM overall score

SourceGemini 3.1 Pro

Gemini 3.1 Pro

winner

67.0

Rank #27/112 · confidence 3 · eval date 2026-02-19

+24.0

GPT-4o

43.0

Rank #104/112 · confidence 1 · eval date 2024-05-13

Codingreported

AA-SciCode

SourceGemini 3.1 Pro

Gemini 3.1 Pro

winner

58.7

Rank #6/113 · confidence 3 · eval date 2026-02-19

+25.4

GPT-4o

33.3

Rank #96/113 · confidence 1 · eval date 2024-05-13

Mathreported

FrontierMath v2 (Tiers 1-3)

SourceGemini 3.1 Pro

Gemini 3.1 Pro

winner

36.9

Rank #15/47 · confidence 3 · eval date 2026-02-19

+36.6

GPT-4o

0.3

Rank #47/47 · confidence 1 · eval date 2024-05-13

Mathreported

BenchLM Math score

SourceGemini 3.1 Pro

Gemini 3.1 Pro

winner

54.3

Rank #35/63 · confidence 3 · eval date 2026-02-19

+29.1

GPT-4o

25.2

Rank #61/63 · confidence 1 · eval date 2024-05-13

Knowledgereported

AA-GPQA Diamond

SourceGemini 3.1 Pro

Gemini 3.1 Pro

winner

94.1

Rank #5/113 · confidence 3 · eval date 2026-02-19

+39.8

GPT-4o

54.3

Rank #107/113 · confidence 1 · eval date 2024-05-13

Knowledgereported

AA-Omniscience Accuracy

SourceGemini 3.1 Pro

Gemini 3.1 Pro

winner

54.9

Rank #9/106 · confidence 3 · eval date 2026-02-19

+35.0

GPT-4o

19.9

Rank #90/106 · confidence 1 · eval date 2024-05-13

Knowledgereported

AA-HLE

SourceGemini 3.1 Pro

Gemini 3.1 Pro

winner

47.0

Rank #10/114 · confidence 3 · eval date 2026-02-19

+44.6

GPT-4o

2.4

Rank #114/114 · confidence 1 · eval date 2024-05-13

Knowledgereported

Artificial Analysis Intelligence Index

SourceGemini 3.1 Pro

Gemini 3.1 Pro

winner

30.4

Rank #48/117 · confidence 3 · eval date 2026-02-19

+19.3

GPT-4o

11.1

Rank #107/117 · confidence 1 · eval date 2024-05-13

Knowledgereported

AA-Omniscience Hallucination Rate

SourceGemini 3.1 Pro

Gemini 3.1 Pro

winner

50.9

Rank #76/106 · confidence 3 · eval date 2026-02-19

+13.0

GPT-4o

37.9

Rank #89/106 · confidence 1 · eval date 2024-05-13

Multimodalreported

Design Arena Website

SourceGemini 3.1 Pro

Gemini 3.1 Pro

winner

1265.0

Rank #32/78 · confidence 3 · eval date 2026-02-19

+423.0

GPT-4o

842.0

Rank #77/78 · confidence 1 · eval date 2024-05-13

Instruction followingreported

AA-IFBench

SourceGemini 3.1 Pro

Gemini 3.1 Pro

winner

77.1

Rank #7/84 · confidence 3 · eval date 2026-02-19

+42.8

GPT-4o

34.3

Rank #80/84 · confidence 1 · eval date 2024-05-13

Agentsreported

τ²-bench results

SourceGemini 3.1 Pro

Gemini 3.1 Pro

winner

95.6

Rank #17/82 · confidence 3 · eval date 2026-02-19

+70.5

GPT-4o

25.1

Rank #73/82 · confidence 1 · eval date 2024-05-13

API audit comparison

Latest completed audits from shared providers, with four safety and integrity score groups plus report links.

Provider
Gemini 3.1 Pro
GPT-4o
No completed audits are available from shared providers yet.

Provider examples

Speed aggregates and input/output pricing share each provider row for real API selection and migration cost checks.

Provider
Gemini 3.1 Pro
GPT-4o
速创API25 tests

Gemini 3.1 Pro

speed / latency

105 tok/s / 12723ms

input / output

No data

GPT-4o

speed / latency

88 tok/s / 1593ms

input / output

No data

CatClaw API20 tests

Gemini 3.1 Pro

speed / latency

121 tok/s / 11404ms

input / output

No data

GPT-4o

speed / latency

57 tok/s / 3381ms

input / output

No data

TradingBase API10 tests

Gemini 3.1 Pro

speed / latency

102 tok/s / 12933ms

input / output

No data

GPT-4o

speed / latency

N/A / N/A

input / output

No data

小水管 API10 tests

Gemini 3.1 Pro

speed / latency

101 tok/s / 15025ms

input / output

No data

GPT-4o

speed / latency

N/A / N/A

input / output

No data

AIHubMix5 tests

Gemini 3.1 Pro

speed / latency

70 tok/s / 25059ms

input / output

No data

GPT-4o

speed / latency

N/A / N/A

input / output

No data

DeadlySignal API

Gemini 3.1 Pro

gemini-3.1-pro

speed / latency

No data

input / output

$0/M/$0/M

GPT-4o

gpt-4o

speed / latency

No data

input / output

$0/M/$0/M

兔子API

Gemini 3.1 Pro

gemini-3.1-pro-preview-high

speed / latency

No data

input / output

$0/request

GPT-4o

gpt-4o-all

speed / latency

No data

input / output

$0/request

KFCV50

Gemini 3.1 Pro

gemini-3.1-pro-preview

speed / latency

No data

input / output

$0.0052/request

GPT-4o

gpt-4o-2024-08-06

speed / latency

No data

input / output

$0.171/M/$0.685/M

PoloAPI

Gemini 3.1 Pro

gemini-3.1-pro-preview-c

speed / latency

No data

input / output

$0.0055/request

GPT-4o

gpt-4o-2024-08-06

speed / latency

No data

input / output

$0.274/M/$1.10/M

Newagiai

Gemini 3.1 Pro

gemini-3.1-pro-preview

speed / latency

No data

input / output

$0.274/M/$1.64/M

GPT-4o

gpt-4o-all

speed / latency

No data

input / output

$0.0066/request

FAQ

Weighted outcome: Gemini 3.1 Pro. Benchmark capability categories carry 80%, while price, API performance, and availability carry 20%.

Why is this comparison indexable?
It has 6 verifiable comparison points, and both models have pricing or benchmark data.
Are missing metrics invented?
No. Metrics without LMSpeed data are omitted from this report.

Rankings are based on community-submitted tests and periodic health probes. Advisory only, not official data.