Noometry

Model comparison

Gemini 3.1 Pro Preview vs GPT-4o mini

Gemini 3.1 Pro Preview is the stronger model overall, scoring 56.7 to 25.5 on the Noometry Index. GPT-4o mini costs 17× less per token, which makes it the better buy when Gemini 3.1 Pro Preview's lead doesn't matter for your workload.

Last verified . 32 shared benchmarks.

Gemini 3.1 Pro Preview Google

56.7

Rank #23 Confirmed

GPT-4o mini OpenAI

25.5

Rank #343 Confirmed

Summary

  • They share 32 benchmarks with published results for both. Gemini 3.1 Pro Preview scores higher in 10 categories and GPT-4o mini in 0 categories; 10 gaps are clear of the uncertainty.
  • The widest gap is in reasoning, where Gemini 3.1 Pro Preview leads 71.7 to 8.7.
  • The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 95.6% for Gemini 3.1 Pro Preview and 6.9% for GPT-4o mini.
  • GPT-4o mini is cheaper at $0.15 / $0.60 per million input/output tokens, against $2 / $12 for Gemini 3.1 Pro Preview.
  • Gemini 3.1 Pro Preview accepts more context: 1.05M tokens versus 128K.

Side by side

Gemini 3.1 Pro PreviewGPT-4o mini
ProviderGoogleOpenAI
Noometry Index56.725.5
Released2026-02-192024-07-18
WeightsProprietaryProprietary
Context window1.05M128K
Max output66K16K
Input $ / M tokens$2$0.15
Output $ / M tokens$12$0.60
Results tracked7160

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Category by category

Coding Gemini 3.1 Pro Preview leads

Gemini 3.1 Pro Preview: 42.5 (#99), GPT-4o mini: 22.0 (#335)

BenchmarkGemini 3.1 Pro PreviewGPT-4o mini
WeirdML72.1%11.8%
LMArena Coding14841290
SWE-bench Verified75.6%—
DeepSWE11.7%—
Aider Polyglot—3.6%
LMArena WebDev1447—
SciCode58.9%—
GSO22.6%—
BigCodeBench Instruct—46.1%
LiveBench Coding—43.1%
MirrorCode8.9%—
BigCodeBench Complete—57.4%
ALE-Bench1,161—
AlgoTune2.02—
HumanEval+—83.5%
MBPP+—72.2%

Agentic & Tool Use Gemini 3.1 Pro Preview leads

Gemini 3.1 Pro Preview: 37.7 (#34), GPT-4o mini: 27.5 (#101)

BenchmarkGemini 3.1 Pro PreviewGPT-4o mini
BALROG57%17.4%
Terminal-Bench80.2%—
APEX-Agents35.3%—
τ²-bench Banking26%—
DeepResearch Bench47.8%—
PostTrainBench22%—
ExploitBench26.1%—
GBAEval0.8%—
GDP.pdf17%—
LMArena Search1211—
METR Time Horizons77%—
Vending-Bench 23,774—

Reasoning Gemini 3.1 Pro Preview leads

Gemini 3.1 Pro Preview: 71.7 (#12), GPT-4o mini: 8.7 (#347)

BenchmarkGemini 3.1 Pro PreviewGPT-4o mini
ARC-AGI-277.1%0%
SimpleBench79.6%10.7%
Chess Puzzles55%0%
LMArena Hard Prompts14851267
Mystery Game Puzzles34%12%
DTBench97.1%54.4%
LMCA53.8%10.4%
Epoch Capabilities Index154.77126.56
Kagi LLM Benchmark—28.8%
NYT Connections (extended)97.4%—
ARC-AGI-198%—
CritPt17.7%—
EnigmaEval36.8%—
Thematic Generalization79.4%—
EBR-Bench14.3%—
LiveBench Reasoning—32.8%
LiveBench Data Analysis—50%
ForecastBench59—
LiveBench—41.3%
PIQA—88.7%

Math Gemini 3.1 Pro Preview leads

Gemini 3.1 Pro Preview: 62.1 (#34), GPT-4o mini: 10.4 (#314)

BenchmarkGemini 3.1 Pro PreviewGPT-4o mini
FrontierMath (Tiers 1-3)59.6%0.7%
OTIS Mock AIME 2024-202595.6%6.9%
LMArena Math14851267
FrontierMath Tier 426.8%—
MathArena Final-Answer Competitions86.5%—
ProofBench26%—
Omni-MATH—28%
LiveBench Math—36.3%
MATH Level 5—52.6%
FrontierMath (Feb 2025 set)36.9%—
FrontierMath Tier 4 (v1)16.7%—
GSM8K—91.3%

Knowledge Gemini 3.1 Pro Preview leads

Gemini 3.1 Pro Preview: 71.8 (#3), GPT-4o mini: 17.7 (#284)

BenchmarkGemini 3.1 Pro PreviewGPT-4o mini
GPQA Diamond94.4%37.7%
SimpleQA Verified73.5%8.3%
LMArena Expert14851235
Humanity's Last Exam46.4%—
MMLU-Pro—60.3%
Confabulations—37.2%
Vectara Hallucination Rate10.4%—
GPQA (HELM)—36.8%
BoolQ—88.7%
MMLU—81.8%

Multimodal Gemini 3.1 Pro Preview leads

Gemini 3.1 Pro Preview: 37.9 (#69), GPT-4o mini: 25.9 (#122)

BenchmarkGemini 3.1 Pro PreviewGPT-4o mini
LMArena Vision12961066
Video-MME—64.8%
GeoBench—64%
VPCT—34%
Blueprint-Bench 226.5%—
Furniture Assembly26.7%—
LMArena Document1444—

Multilingual Gemini 3.1 Pro Preview leads

Gemini 3.1 Pro Preview: 57.0 (#12), GPT-4o mini: 42.0 (#199)

BenchmarkGemini 3.1 Pro PreviewGPT-4o mini
LMArena Non-English14771266
LMArena Chinese15291265
LMArena French14871297
LMArena German14911272
LMArena Japanese14931216
LMArena Korean14551195
LMArena Russian14981275
LMArena Spanish14791276

Instruction Following Gemini 3.1 Pro Preview leads

Gemini 3.1 Pro Preview: 77.0 (#32), GPT-4o mini: 61.9 (#239)

BenchmarkGemini 3.1 Pro PreviewGPT-4o mini
LMArena Instruction Following14661258
LiveBench Instruction Following—56.8%
IFEval—78.2%

Long Context Gemini 3.1 Pro Preview leads

Gemini 3.1 Pro Preview: 47.4 (#18), GPT-4o mini: 39.1 (#186)

BenchmarkGemini 3.1 Pro PreviewGPT-4o mini
LMArena Longer Query14831289
CL-bench20.8%—
CL-bench Life16.9%—

Writing & Preference Gemini 3.1 Pro Preview leads

Gemini 3.1 Pro Preview: 66.1 (#37), GPT-4o mini: 39.5 (#248)

BenchmarkGemini 3.1 Pro PreviewGPT-4o mini
LMArena Text14811286
LMArena Creative Writing14821268
EQ-Bench Creative Writing1491873
LMArena Multi-Turn14881285
Short-Story Creative Writing—67.2%
WildBench—79.1%
EQ-Bench 41142—
LiveBench Language—28.6%

Frequently asked questions

Is Gemini 3.1 Pro Preview better than GPT-4o mini?

Gemini 3.1 Pro Preview is the stronger model overall, scoring 56.7 to 25.5 on the Noometry Index. GPT-4o mini costs 17× less per token, which makes it the better buy when Gemini 3.1 Pro Preview's lead doesn't matter for your workload.

Which is cheaper, Gemini 3.1 Pro Preview or GPT-4o mini?

GPT-4o mini is cheaper. It lists at $0.15 per million input tokens and $0.60 per million output tokens; Gemini 3.1 Pro Preview lists at $2 and $12.

Is Gemini 3.1 Pro Preview or GPT-4o mini better for coding?

Gemini 3.1 Pro Preview scores higher on coding benchmarks: 42.5 versus 22.0 in the Noometry coding category.

Which has the bigger context window?

Gemini 3.1 Pro Preview does, with 1.05M tokens against 128K.

How many benchmarks do Gemini 3.1 Pro Preview and GPT-4o mini share?

32 benchmarks have published results for both models. Gemini 3.1 Pro Preview has 71 scored results on Noometry and GPT-4o mini has 60.

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