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Gemini 3.1 Pro vs O3 Mini

The readout for Gemini 3.1 Pro and O3 Mini, before the detailed comparison sheet.

Model A

Gemini 3.1 Pro

Google

Leading
vs

Model B

O3 Mini

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 65.3 to 34.7.

Evidence depth

81 data points

Includes 8 benchmark rows, 0 audit samples, and 10 provider examples.

Selection signal

Start with Gemini 3.1 Pro

The charts below split 18 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 O3 Mini: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.

Model compare
Gemini 3.1 Pro
O3 Mini
Overall leaderLeadingContender
Weighted overall score65.3 pts34.7 pts
Benchmark category leads4 categories2 categories
Operational advantagesAverage speed, Free providers, Provider coverageCheapest input price, First-token latency
Context window1.0M tokens200K tokens
Max output65.5K tokens100K tokens
Modalities

Input

AudioFileImageTextvideo

Output

Text

Input

TextFile

Output

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

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
O3 Mini
DeveloperGoogleOpenAI
ReleasedFeb 2026Feb 2025
ParametersNo dataNo data
TokenizerGeminiGPT
Knowledge cutoffNo data2023-10-31
OpenRouter IDgoogle/gemini-3.1-pro-previewopenai/o3-mini
ReferencesNo dataNo data

When to choose each model

This report only uses LMSpeed data for Gemini 3.1 Pro and O3 Mini: 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) and operational dimensions (Average speed, Free providers, Provider coverage).

O3 Mini

O3 Mini is stronger in benchmark categories (Math, Instruction following) and operational dimensions (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

O3 Mini

48.3

Agents

Gemini 3.1 Pro leads by 10.8

Gemini 3.1 Pro50.2
O3 Mini39.4

Coding

Gemini 3.1 Pro leads by 18.0

Gemini 3.1 Pro57.2
O3 Mini39.2

Reasoning

Gemini 3.1 Pro leads by 8.1

Gemini 3.1 Pro57.4
O3 Mini49.3

Knowledge

Gemini 3.1 Pro leads by 9.2

Gemini 3.1 Pro57
O3 Mini47.8

Math

O3 Mini leads by 3.9

Gemini 3.1 Pro54.6
O3 Mini58.5

Multilingual

Gemini 3.1 Pro

Gemini 3.1 Pro69.3
O3 Mini-

Multimodal

Gemini 3.1 Pro

Gemini 3.1 Pro55.1
O3 Mini-

Instruction following

O3 Mini leads by 0.3

Gemini 3.1 Pro55.3
O3 Mini55.6

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 #27/111 · confidence 3 · eval date 2026-02-19

+16.0

O3 Mini

51.0

Rank #78/111 · confidence 1 · eval date 2025-01-31

Codingreported

AA-SciCode

SourceGemini 3.1 Pro

Gemini 3.1 Pro

winner

58.7

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

+18.8

O3 Mini

39.9

Rank #76/113 · confidence 1 · eval date 2025-01-31

Codingreported

BenchLM Coding score

SourceGemini 3.1 Pro

Gemini 3.1 Pro

winner

74.3

Rank #8/87 · confidence 3 · eval date 2026-02-19

+53.0

O3 Mini

21.3

Rank #86/87 · confidence 1 · eval date 2025-01-31

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

+19.3

O3 Mini

74.8

Rank #87/113 · confidence 1 · eval date 2025-01-31

Knowledgereported

AA-HLE

SourceGemini 3.1 Pro

Gemini 3.1 Pro

winner

47.0

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

+39.1

O3 Mini

7.9

Rank #89/114 · confidence 1 · eval date 2025-01-31

Knowledgereported

BenchLM Knowledge score

SourceGemini 3.1 Pro

Gemini 3.1 Pro

winner

79.2

Rank #20/83 · confidence 3 · eval date 2026-02-19

+13.6

O3 Mini

65.6

Rank #48/83 · confidence 1 · eval date 2025-01-31

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

+11.1

O3 Mini

19.2

Rank #88/117 · confidence 1 · eval date 2025-01-31

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

+66.9

O3 Mini

28.7

Rank #72/82 · confidence 1 · eval date 2025-01-31

API audit comparison

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

Provider
Gemini 3.1 Pro
O3 Mini
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
O3 Mini
丸美小沐25 tests

Gemini 3.1 Pro

speed / latency

N/A / N/A

input / output

No data

O3 Mini

speed / latency

66 tok/s / 6491ms

input / output

No data

ZetaTechs API6 tests

Gemini 3.1 Pro

speed / latency

N/A / N/A

input / output

No data

O3 Mini

speed / latency

44 tok/s / 17418ms

input / output

No data

AIHubMix5 tests

Gemini 3.1 Pro

speed / latency

70 tok/s / 25059ms

input / output

No data

O3 Mini

speed / latency

N/A / N/A

input / output

No data

N1N5 tests

Gemini 3.1 Pro

speed / latency

N/A / N/A

input / output

No data

O3 Mini

speed / latency

117 tok/s / 4809ms

input / output

No data

艾可API5 tests

Gemini 3.1 Pro

speed / latency

70 tok/s / 18615ms

input / output

No data

O3 Mini

speed / latency

N/A / N/A

input / output

No data

兔子API

Gemini 3.1 Pro

gemini-3.1-pro-preview-low

speed / latency

No data

input / output

$0/request

O3 Mini

o3-mini-medium

speed / latency

No data

input / output

$0/request

Newagiai

Gemini 3.1 Pro

gemini-3.1-pro-preview

speed / latency

No data

input / output

$0.274/M/$1.64/M

O3 Mini

o3-mini-all

speed / latency

No data

input / output

$0.0033/request

柏拉图AI

Gemini 3.1 Pro

gemini-3.1-pro-preview

speed / latency

No data

input / output

$0.274/M/$1.64/M

O3 Mini

o3-mini-all

speed / latency

No data

input / output

$0.0033/request

KFCV50

Gemini 3.1 Pro

gemini-3.1-pro-preview

speed / latency

No data

input / output

$0.0052/request

O3 Mini

o3-mini

speed / latency

No data

input / output

$0.075/M/$0.301/M

PoloAPI

Gemini 3.1 Pro

gemini-3.1-pro-preview-c

speed / latency

No data

input / output

$0.0055/request

O3 Mini

o3-mini-all

speed / latency

No data

input / output

$0.0095/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.