Noometry

Model comparison

Gemma 2 9B vs GPT-5.1

GPT-5.1 is the stronger model overall, scoring 48.8 to 25.7 on the Noometry Index.

Last verified . 27 shared benchmarks.

Gemma 2 9B Google

25.7

Rank #334 Confirmed

GPT-5.1 OpenAI

48.8

Rank #47 Confirmed

Summary

  • They share 27 benchmarks with published results for both. Gemma 2 9B scores higher in 0 categories and GPT-5.1 in 8 categories; 8 gaps are clear of the uncertainty.
  • The widest gap is in math, where GPT-5.1 leads 50.3 to 9.3.
  • The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 0.6% for Gemma 2 9B and 88.6% for GPT-5.1.
  • Gemma 2 9B has downloadable open weights; the other is API-only.

Side by side

Gemma 2 9BGPT-5.1
ProviderGoogleOpenAI
Noometry Index25.748.8
Released2024-06-242025-11-13
WeightsOpenProprietary
Context window—400K
Max output—128K
Input $ / M tokens—$1.25
Output $ / M tokens—$10
Results tracked3563

Sponsored placements are available on pages like this one. Advertise on Noometry

Category by category

Coding GPT-5.1 leads

Gemma 2 9B: 29.0 (#299), GPT-5.1: 46.9 (#59)

BenchmarkGemma 2 9BGPT-5.1
LiveBench Coding22.5%72.5%
LMArena Coding11741454
SWE-bench Verified—68%
SWE-bench Verified (bash only)—66%
LMArena WebDev—1395
SciCode—43.3%
GSO—13.7%
WeirdML—60.8%
BigCodeBench Instruct34.7%—
BigCodeBench Complete40.6%—
ALE-Bench—1,192

Agentic & Tool Use Not comparable

Gemma 2 9B: —, GPT-5.1: 32.5 (#55)

BenchmarkGemma 2 9BGPT-5.1
Terminal-Bench—47.6%
DeepResearch Bench—42.8%
LMArena Search—1199
Vending-Bench 2—1,473

Reasoning GPT-5.1 leads

Gemma 2 9B: 15.3 (#306), GPT-5.1: 39.9 (#50)

BenchmarkGemma 2 9BGPT-5.1
LiveBench Reasoning15.2%95.8%
LMArena Hard Prompts11721457
LiveBench Data Analysis36.4%72.1%
Epoch Capabilities Index119.78149.66
LiveBench28.7%78.8%
ARC-AGI-2—17.6%
SimpleBench—53.2%
ARC-AGI-1—72.8%
CritPt—4.9%
Chess Puzzles—32%
EnigmaEval—11.2%
Mystery Game Puzzles—19%
DTBench—90.1%
LMCA—43.9%
ForecastBench—58.1
PIQA83.7%—

Math GPT-5.1 leads

Gemma 2 9B: 9.3 (#312), GPT-5.1: 50.3 (#45)

BenchmarkGemma 2 9BGPT-5.1
OTIS Mock AIME 2024-20250.6%88.6%
LiveBench Math19.8%94.5%
LMArena Math11831446
Omni-MATH—46.4%
MATH Level 521%—
FrontierMath (Feb 2025 set)—31%
FrontierMath Tier 4 (v1)—12.5%
GSM8K84.9%—

Knowledge GPT-5.1 leads

Gemma 2 9B: 9.7 (#300), GPT-5.1: 50.5 (#65)

BenchmarkGemma 2 9BGPT-5.1
GPQA Diamond27.5%87.6%
LMArena Expert11471470
Humanity's Last Exam—23.7%
SimpleQA Verified—48%
MMLU-Pro—57.9%
Vectara Hallucination Rate—10.9%
GPQA (HELM)—44.2%
BoolQ85.7%—
MMLU72.1%—

Multimodal Not comparable

Gemma 2 9B: —, GPT-5.1: 44.0 (#17)

BenchmarkGemma 2 9BGPT-5.1
LMArena Vision—1250
VPCT—58.7%
LMArena Document—1403

Multilingual GPT-5.1 leads

Gemma 2 9B: 36.8 (#233), GPT-5.1: 54.0 (#51)

BenchmarkGemma 2 9BGPT-5.1
LMArena Non-English11881431
LMArena Chinese11851495
LMArena French11891451
LMArena German11861439
LMArena Japanese11441453
LMArena Korean11371401
LMArena Russian12001435
LMArena Spanish12001430

Instruction Following GPT-5.1 leads

Gemma 2 9B: 57.8 (#264), GPT-5.1: 84.0 (#1)

BenchmarkGemma 2 9BGPT-5.1
LiveBench Instruction Following52.6%93.3%
LMArena Instruction Following11781442
IFEval—93.5%

Long Context GPT-5.1 leads

Gemma 2 9B: 36.3 (#228), GPT-5.1: 47.6 (#14)

BenchmarkGemma 2 9BGPT-5.1
LMArena Longer Query11971448
CL-bench—23.7%
CL-bench Life—17.3%

Writing & Preference GPT-5.1 leads

Gemma 2 9B: 32.3 (#276), GPT-5.1: 64.7 (#53)

BenchmarkGemma 2 9BGPT-5.1
LMArena Text12071443
LMArena Creative Writing12061427
LMArena Multi-Turn11931449
LiveBench Language25.5%80.2%
EQ-Bench Creative Writing841—
WildBench—86.3%

Frequently asked questions

Is Gemma 2 9B better than GPT-5.1?

GPT-5.1 is the stronger model overall, scoring 48.8 to 25.7 on the Noometry Index.

Is Gemma 2 9B or GPT-5.1 better for coding?

GPT-5.1 scores higher on coding benchmarks: 46.9 versus 29.0 in the Noometry coding category.

How many benchmarks do Gemma 2 9B and GPT-5.1 share?

27 benchmarks have published results for both models. Gemma 2 9B has 35 scored results on Noometry and GPT-5.1 has 63.

Related comparisons

Go deeper