Noometry

Model comparison

Gemma 3 12B vs GPT-5.5 Instant

GPT-5.5 Instant is the stronger model overall, scoring 42.5 to 31.8 on the Noometry Index.

Last verified . 18 shared benchmarks.

Gemma 3 12B Google

31.8

Rank #255 Confirmed

GPT-5.5 Instant OpenAI

42.5

Rank #99 Confirmed

Summary

  • They share 18 benchmarks with published results for both. Gemma 3 12B scores higher in 0 categories and GPT-5.5 Instant in 8 categories; 8 gaps are clear of the uncertainty.
  • The widest gap is in knowledge, where GPT-5.5 Instant leads 48.9 to 26.5.
  • The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 16.7% for Gemma 3 12B and 68.1% for GPT-5.5 Instant.
  • Gemma 3 12B has downloadable open weights; the other is API-only.

Side by side

Gemma 3 12BGPT-5.5 Instant
ProviderGoogleOpenAI
Noometry Index31.842.5
Released2025-03-122026-05-05
WeightsOpenProprietary
Context window131K—
Max output8K—
Input $ / M tokens$0.05—
Output $ / M tokens$0.15—
Results tracked2427

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

Category by category

Coding GPT-5.5 Instant leads

Gemma 3 12B: 31.2 (#276), GPT-5.5 Instant: 43.7 (#73)

BenchmarkGemma 3 12BGPT-5.5 Instant
SciCode17.4%48.6%
LMArena Coding12811433

Agentic & Tool Use Not comparable

Gemma 3 12B: 25.3 (#101), GPT-5.5 Instant: —

BenchmarkGemma 3 12BGPT-5.5 Instant
Berkeley Function Calling Leaderboard30.4%—

Reasoning GPT-5.5 Instant leads

Gemma 3 12B: 15.2 (#307), GPT-5.5 Instant: 24.2 (#149)

BenchmarkGemma 3 12BGPT-5.5 Instant
CritPt0%0%
Chess Puzzles0%12%
LMArena Hard Prompts13091426
Epoch Capabilities Index123.49142.48
DTBench48.8%—
LMCA4.5%—

Math GPT-5.5 Instant leads

Gemma 3 12B: 21.0 (#273), GPT-5.5 Instant: 26.1 (#241)

BenchmarkGemma 3 12BGPT-5.5 Instant
OTIS Mock AIME 2024-202516.7%68.1%
LMArena Math13071420
FrontierMath (Tiers 1-3)—26.3%
FrontierMath Tier 4—2.4%

Knowledge GPT-5.5 Instant leads

Gemma 3 12B: 26.5 (#250), GPT-5.5 Instant: 48.9 (#68)

BenchmarkGemma 3 12BGPT-5.5 Instant
GPQA Diamond39.5%82.5%
LMArena Expert12481409
Vectara Hallucination Rate4.4%—

Multimodal Not comparable

Gemma 3 12B: —, GPT-5.5 Instant: 39.3 (#48)

BenchmarkGemma 3 12BGPT-5.5 Instant
LMArena Vision—1250
LMArena Document—1403
MindCube46.7%—

Multilingual GPT-5.5 Instant leads

Gemma 3 12B: 45.9 (#160), GPT-5.5 Instant: 53.0 (#76)

BenchmarkGemma 3 12BGPT-5.5 Instant
LMArena Non-English13181417
LMArena German13701410
LMArena Russian13351430
LMArena Chinese—1457
LMArena French—1428
LMArena Japanese—1408
LMArena Korean—1393
LMArena Spanish—1430

Instruction Following GPT-5.5 Instant leads

Gemma 3 12B: 68.8 (#179), GPT-5.5 Instant: 74.4 (#94)

BenchmarkGemma 3 12BGPT-5.5 Instant
LMArena Instruction Following12991407

Long Context GPT-5.5 Instant leads

Gemma 3 12B: 40.0 (#157), GPT-5.5 Instant: 43.4 (#92)

BenchmarkGemma 3 12BGPT-5.5 Instant
LMArena Longer Query13171422

Writing & Preference GPT-5.5 Instant leads

Gemma 3 12B: 47.7 (#205), GPT-5.5 Instant: 62.0 (#81)

BenchmarkGemma 3 12BGPT-5.5 Instant
LMArena Text13341419
LMArena Creative Writing13311420
LMArena Multi-Turn13341434
EQ-Bench Creative Writing1126—

Frequently asked questions

Is Gemma 3 12B better than GPT-5.5 Instant?

GPT-5.5 Instant is the stronger model overall, scoring 42.5 to 31.8 on the Noometry Index.

Is Gemma 3 12B or GPT-5.5 Instant better for coding?

GPT-5.5 Instant scores higher on coding benchmarks: 43.7 versus 31.2 in the Noometry coding category.

How many benchmarks do Gemma 3 12B and GPT-5.5 Instant share?

18 benchmarks have published results for both models. Gemma 3 12B has 24 scored results on Noometry and GPT-5.5 Instant has 27.

Related comparisons

Go deeper