Noometry

Model comparison

Gemma 3 12B vs GPT-5.3 Chat

GPT-5.3 Chat is the stronger model overall, scoring 42.8 to 32.1 on the Noometry Index. Gemma 3 12B costs 64× less per token, which makes it the better buy when GPT-5.3 Chat's lead doesn't matter for your workload.

Last verified . 13 shared benchmarks.

Gemma 3 12B Google

32.1

Rank #262 Confirmed

GPT-5.3 Chat OpenAI

42.8

Rank #109 Confirmed

Summary

  • They share 13 benchmarks with published results for both. Gemma 3 12B scores higher in 0 categories and GPT-5.3 Chat in 8 categories; 8 gaps are clear of the uncertainty.
  • The widest gap is in math, where GPT-5.3 Chat leads 38.2 to 22.3.
  • Gemma 3 12B is cheaper at $0.05 / $0.15 per million input/output tokens, against $1.75 / $14 for GPT-5.3 Chat.
  • Gemma 3 12B accepts more context: 131K tokens versus 128K.
  • Gemma 3 12B has downloadable open weights; the other is API-only.

Side by side

Gemma 3 12BGPT-5.3 Chat
ProviderGoogleOpenAI
Noometry Index32.142.8
Released2025-03-122026-03-03
WeightsOpenProprietary
Context window131K128K
Max output8K16K
Input $ / M tokens$0.05$1.75
Output $ / M tokens$0.15$14
Results tracked2418

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Category by category

Coding GPT-5.3 Chat leads

Gemma 3 12B: 31.7 (#280), GPT-5.3 Chat: 41.4 (#124)

BenchmarkGemma 3 12BGPT-5.3 Chat
LMArena Coding12811408
SciCode17.4%—

Agentic & Tool Use Not comparable

Gemma 3 12B: 25.5 (#108), GPT-5.3 Chat: —

BenchmarkGemma 3 12BGPT-5.3 Chat
Berkeley Function Calling Leaderboard30.4%—

Reasoning GPT-5.3 Chat leads

Gemma 3 12B: 15.7 (#313), GPT-5.3 Chat: 28.5 (#102)

BenchmarkGemma 3 12BGPT-5.3 Chat
LMArena Hard Prompts13091399
CritPt0%—
Chess Puzzles0%—
DTBench48.8%—
LMCA4.5%—
Epoch Capabilities Index123.5—

Math GPT-5.3 Chat leads

Gemma 3 12B: 22.3 (#279), GPT-5.3 Chat: 38.2 (#142)

BenchmarkGemma 3 12BGPT-5.3 Chat
LMArena Math13071389
OTIS Mock AIME 2024-202516.7%—

Knowledge GPT-5.3 Chat leads

Gemma 3 12B: 26.5 (#257), GPT-5.3 Chat: 38.8 (#140)

BenchmarkGemma 3 12BGPT-5.3 Chat
LMArena Expert12481397
GPQA Diamond39.5%—
Vectara Hallucination Rate4.4%—

Multimodal Not comparable

Gemma 3 12B: —, GPT-5.3 Chat: —

BenchmarkGemma 3 12BGPT-5.3 Chat
MindCube46.7%—

Multilingual GPT-5.3 Chat leads

Gemma 3 12B: 45.7 (#165), GPT-5.3 Chat: 50.3 (#124)

BenchmarkGemma 3 12BGPT-5.3 Chat
LMArena Non-English13181382
LMArena German13701384
LMArena Russian13351400
LMArena Chinese—1432
LMArena French—1397
LMArena Japanese—1352
LMArena Korean—1346
LMArena Spanish—1371

Instruction Following GPT-5.3 Chat leads

Gemma 3 12B: 68.6 (#186), GPT-5.3 Chat: 72.8 (#129)

BenchmarkGemma 3 12BGPT-5.3 Chat
LMArena Instruction Following12991378

Long Context GPT-5.3 Chat leads

Gemma 3 12B: 40.0 (#162), GPT-5.3 Chat: 42.6 (#120)

BenchmarkGemma 3 12BGPT-5.3 Chat
LMArena Longer Query13171396

Writing & Preference GPT-5.3 Chat leads

Gemma 3 12B: 47.5 (#209), GPT-5.3 Chat: 63.1 (#68)

BenchmarkGemma 3 12BGPT-5.3 Chat
LMArena Text13341389
LMArena Creative Writing13311355
EQ-Bench Creative Writing11261690
LMArena Multi-Turn13341412

Frequently asked questions

Is Gemma 3 12B better than GPT-5.3 Chat?

GPT-5.3 Chat is the stronger model overall, scoring 42.8 to 32.1 on the Noometry Index. Gemma 3 12B costs 64× less per token, which makes it the better buy when GPT-5.3 Chat's lead doesn't matter for your workload.

Which is cheaper, Gemma 3 12B or GPT-5.3 Chat?

Gemma 3 12B is cheaper. It lists at $0.05 per million input tokens and $0.15 per million output tokens; GPT-5.3 Chat lists at $1.75 and $14.

Is Gemma 3 12B or GPT-5.3 Chat better for coding?

GPT-5.3 Chat scores higher on coding benchmarks: 41.4 versus 31.7 in the Noometry coding category.

Which has the bigger context window?

Gemma 3 12B does, with 131K tokens against 128K.

How many benchmarks do Gemma 3 12B and GPT-5.3 Chat share?

13 benchmarks have published results for both models. Gemma 3 12B has 24 scored results on Noometry and GPT-5.3 Chat has 18.

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