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Gemini 3.1 Pro vs GPT-5

The readout for Gemini 3.1 Pro and GPT-5, before the detailed comparison sheet.

Model A

Gemini 3.1 Pro

Google

Leading
vs

Model B

GPT-5

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 80.6 to 19.4.

Evidence depth

105 data points

Includes 20 benchmark rows, 0 audit samples, and 10 provider examples.

Selection signal

Start with Gemini 3.1 Pro

The charts below split 30 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-5: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.

Model compare
Gemini 3.1 Pro
GPT-5
Overall leaderLeadingContender
Weighted overall score80.6 pts19.4 pts
Benchmark category leads6 categories1 categories
Operational advantagesAverage speed, Free providers, Provider coverageCheapest input price, First-token latency
Context window1.0M tokens400K tokens
Max output65.5K tokens128K 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 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
GPT-5
DeveloperGoogleOpenAI
ReleasedFeb 2026Aug 2025
ParametersNo dataNo data
TokenizerGeminiGPT
Knowledge cutoffNo data2024-09-30
OpenRouter IDgoogle/gemini-3.1-pro-previewopenai/gpt-5
ReferencesNo dataNo data

When to choose each model

This report only uses LMSpeed data for Gemini 3.1 Pro and GPT-5: 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, Multimodal) and operational dimensions (Average speed, Free providers, Provider coverage).

GPT-5

GPT-5 is stronger in benchmark categories (Math) 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
7 / 8
Shared
7 shared categories

Avg. score

Gemini 3.1 Pro

57

Avg. score

GPT-5

50.9

Agents

Gemini 3.1 Pro leads by 4.4

Gemini 3.1 Pro50.2
GPT-545.8

Coding

Gemini 3.1 Pro leads by 8.6

Gemini 3.1 Pro57.2
GPT-548.6

Reasoning

Gemini 3.1 Pro leads by 6.7

Gemini 3.1 Pro57.4
GPT-550.7

Knowledge

Gemini 3.1 Pro leads by 7.8

Gemini 3.1 Pro57
GPT-549.2

Math

GPT-5 leads by 6.8

Gemini 3.1 Pro54.6
GPT-561.4

Multilingual

Gemini 3.1 Pro

Gemini 3.1 Pro69.3
GPT-5-

Multimodal

Gemini 3.1 Pro leads by 7.2

Gemini 3.1 Pro55.1
GPT-547.9

Instruction following

Gemini 3.1 Pro leads by 2.5

Gemini 3.1 Pro55.3
GPT-552.8

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

67.0

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

0.0

GPT-5

67.0

Rank #27/111 · confidence 1 · eval date 2025-08-07

Reasoningreported

AA-LCR

SourceGemini 3.1 Pro

Gemini 3.1 Pro

winner

82.0

Rank #14/106 · confidence 3 · eval date 2026-02-19

+6.0

GPT-5

76.0

Rank #46/106 · confidence 1 · eval date 2025-08-07

Reasoningreported

BenchLM Reasoning score

SourceGemini 3.1 Pro

Gemini 3.1 Pro

50.6

Rank #60/67 · confidence 3 · eval date 2026-02-19

+22.6

GPT-5

winner

73.2

Rank #31/67 · confidence 1 · eval date 2025-08-07

Codingreported

AA-SciCode

SourceGemini 3.1 Pro

Gemini 3.1 Pro

winner

58.7

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

+17.6

GPT-5

41.1

Rank #66/113 · confidence 2 · eval date 2025-08-07

Codingreported

Vibe Code Bench

SourceGemini 3.1 Pro

Gemini 3.1 Pro

winner

32.0

Rank #13/33 · confidence 3 · eval date 2026-02-19

+11.9

GPT-5

20.1

Rank #22/33 · confidence 1 · eval date 2025-08-07

Codingreported

AA Coding Index

SourceGemini 3.1 Pro

Gemini 3.1 Pro

winner

68.8

Rank #25/75 · confidence 3 · eval date 2026-02-19

+31.0

GPT-5

37.8

Rank #58/75 · confidence 1 · eval date 2025-08-07

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

+9.9

GPT-5

84.2

Rank #64/113 · confidence 1 · eval date 2025-08-07

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

+15.4

GPT-5

39.5

Rank #38/106 · confidence 1 · eval date 2025-08-07

Knowledgereported

AA-HLE

SourceGemini 3.1 Pro

Gemini 3.1 Pro

winner

47.0

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

+21.6

GPT-5

25.4

Rank #60/114 · confidence 1 · eval date 2025-08-07

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

+13.8

GPT-5

65.4

Rank #51/83 · confidence 1 · eval date 2025-08-07

Knowledgereported

AA-Omniscience Hallucination Rate

SourceGemini 3.1 Pro

Gemini 3.1 Pro

50.9

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

+32.3

GPT-5

winner

83.2

Rank #32/106 · confidence 1 · eval date 2025-08-07

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

+7.5

GPT-5

22.9

Rank #76/117 · confidence 1 · eval date 2025-08-07

Multimodalreported

AA-MMMU-Pro

SourceGemini 3.1 Pro

Gemini 3.1 Pro

winner

82.4

Rank #8/68 · confidence 3 · eval date 2026-02-19

+8.1

GPT-5

74.3

Rank #38/68 · confidence 1 · eval date 2025-08-07

Multimodalreported

BenchLM Multimodal Grounded score

SourceGemini 3.1 Pro

Gemini 3.1 Pro

winner

79.2

Rank #14/56 · confidence 3 · eval date 2026-02-19

+9.8

GPT-5

69.4

Rank #27/56 · confidence 1 · eval date 2025-08-07

Multimodalreported

Design Arena Website

SourceGemini 3.1 Pro

Gemini 3.1 Pro

winner

1267.0

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

+68.0

GPT-5

1199.0

Rank #52/78 · confidence 1 · eval date 2025-08-07

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

+6.5

GPT-5

70.6

Rank #32/84 · confidence 1 · eval date 2025-08-07

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

+9.1

GPT-5

86.5

Rank #39/82 · confidence 1 · eval date 2025-08-07

Agentsreported

AA Agentic Index

SourceGemini 3.1 Pro

Gemini 3.1 Pro

10.3

Rank #55/70 · confidence 3 · eval date 2026-02-19

+16.2

GPT-5

winner

26.5

Rank #34/70 · confidence 1 · eval date 2025-08-07

Agentsreported

GDPval-AA

SourceGemini 3.1 Pro

Gemini 3.1 Pro

20.2

Rank #54/66 · confidence 3 · eval date 2026-02-19

+8.9

GPT-5

winner

29.1

Rank #43/66 · confidence 1 · eval date 2025-08-07

Agentsreported

GDPval-AA

SourceGemini 3.1 Pro

Gemini 3.1 Pro

904.0

Rank #55/72 · confidence 3 · eval date 2026-02-19

+179.0

GPT-5

winner

1083.0

Rank #45/72 · confidence 1 · eval date 2025-08-07

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-5
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-5
V-API20 tests

Gemini 3.1 Pro

speed / latency

N/A / N/A

input / output

No data

GPT-5

speed / latency

95 tok/s / 1234ms

input / output

No data

CatClaw API15 tests

Gemini 3.1 Pro

speed / latency

121 tok/s / 11404ms

input / output

No data

GPT-5

speed / latency

45 tok/s / 3704ms

input / output

No data

TradingBase API10 tests

Gemini 3.1 Pro

speed / latency

102 tok/s / 12933ms

input / output

No data

GPT-5

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-5

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-5

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-5

gpt-5

speed / latency

No data

input / output

$0/M/$0/M

Dext API

Gemini 3.1 Pro

gemini-3.1-pro-preview

speed / latency

No data

input / output

$0.096/M/$0.575/M

GPT-5

gpt-5

speed / latency

No data

input / output

$0/M/$0/M

兔子API

Gemini 3.1 Pro

gemini-3.1-pro-preview

speed / latency

No data

input / output

$0/request

GPT-5

gpt-5-high

speed / latency

No data

input / output

$0/request

Yun API

Gemini 3.1 Pro

gemini-3.1-pro-low

speed / latency

No data

input / output

$0.137/M/$0.822/M

GPT-5

gpt-5

speed / latency

No data

input / output

$0.0014/request

KFCV50

Gemini 3.1 Pro

gemini-3.1-pro-preview

speed / latency

No data

input / output

$0.0052/request

GPT-5

gpt-5

speed / latency

No data

input / output

$0.0068/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.