Noometry

Model comparison

Gemma 3 27B vs GPT-5.5 Instant

GPT-5.5 Instant is the stronger model overall, scoring 42.7 to 30.8 on the Noometry Index.

Last verified . 24 shared benchmarks.

Gemma 3 27B Google

30.8

Rank #284 Confirmed

GPT-5.5 Instant OpenAI

42.7

Rank #110 Confirmed

Summary

  • They share 24 benchmarks with published results for both. Gemma 3 27B scores higher in 0 categories and GPT-5.5 Instant in 9 categories; 8 gaps are clear of the uncertainty.
  • The widest gap is in knowledge, where GPT-5.5 Instant leads 48.9 to 25.5.
  • The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 22.5% for Gemma 3 27B and 68.1% for GPT-5.5 Instant.
  • Gemma 3 27B has downloadable open weights; the other is API-only.

Side by side

Gemma 3 27BGPT-5.5 Instant
ProviderGoogleOpenAI
Noometry Index30.842.7
Released2025-03-112026-05-05
WeightsOpenProprietary
Context window131K—
Max output8K—
Input $ / M tokens$0.08—
Output $ / M tokens$0.16—
Results tracked4327

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Category by category

Coding GPT-5.5 Instant leads

Gemma 3 27B: 22.5 (#334), GPT-5.5 Instant: 44.3 (#74)

BenchmarkGemma 3 27BGPT-5.5 Instant
SciCode21.2%48.6%
LMArena Coding13221433
Aider Polyglot4.9%—
LiveBench Coding39.9%—

Agentic & Tool Use Not comparable

Gemma 3 27B: 25.1 (#110), GPT-5.5 Instant: —

BenchmarkGemma 3 27BGPT-5.5 Instant
Berkeley Function Calling Leaderboard29.5%—

Reasoning GPT-5.5 Instant leads

Gemma 3 27B: 16.7 (#301), GPT-5.5 Instant: 24.9 (#155)

BenchmarkGemma 3 27BGPT-5.5 Instant
CritPt0%0%
Chess Puzzles0%12%
LMArena Hard Prompts13401426
Epoch Capabilities Index130.04142.52
Kagi LLM Benchmark40.4%—
LiveBench Reasoning43.8%—
DTBench52.5%—
LiveBench Data Analysis51.5%—
LMCA12.3%—
LiveBench50%—

Math Too close to call

Gemma 3 27B: 25.9 (#265), GPT-5.5 Instant: 26.5 (#259)

BenchmarkGemma 3 27BGPT-5.5 Instant
OTIS Mock AIME 2024-202522.5%68.1%
LMArena Math13121420
FrontierMath (Tiers 1-3)—26.3%
FrontierMath Tier 4—2.4%
LiveBench Math55.4%—
MATH Level 574%—

Knowledge GPT-5.5 Instant leads

Gemma 3 27B: 25.5 (#261), GPT-5.5 Instant: 48.9 (#74)

BenchmarkGemma 3 27BGPT-5.5 Instant
GPQA Diamond47.7%82.5%
LMArena Expert13041409
Confabulations40.3%—
Vectara Hallucination Rate7.4%—

Multimodal GPT-5.5 Instant leads

Gemma 3 27B: 32.6 (#100), GPT-5.5 Instant: 40.0 (#52)

BenchmarkGemma 3 27BGPT-5.5 Instant
LMArena Vision11641250
GeoBench52%—
LMArena Document—1403

Multilingual GPT-5.5 Instant leads

Gemma 3 27B: 46.9 (#155), GPT-5.5 Instant: 52.8 (#80)

BenchmarkGemma 3 27BGPT-5.5 Instant
LMArena Non-English13341417
LMArena Chinese13461456
LMArena French13681428
LMArena German13621411
LMArena Japanese12871408
LMArena Korean13081392
LMArena Russian13491431
LMArena Spanish13491429

Instruction Following GPT-5.5 Instant leads

Gemma 3 27B: 70.6 (#160), GPT-5.5 Instant: 74.2 (#100)

BenchmarkGemma 3 27BGPT-5.5 Instant
LMArena Instruction Following13211406
LiveBench Instruction Following74.9%—

Long Context GPT-5.5 Instant leads

Gemma 3 27B: 27.6 (#293), GPT-5.5 Instant: 43.4 (#96)

BenchmarkGemma 3 27BGPT-5.5 Instant
LMArena Longer Query13331422
Fiction.LiveBench33.3%—

Writing & Preference GPT-5.5 Instant leads

Gemma 3 27B: 52.5 (#168), GPT-5.5 Instant: 61.8 (#85)

BenchmarkGemma 3 27BGPT-5.5 Instant
LMArena Text13581419
LMArena Creative Writing13461419
LMArena Multi-Turn13451433
Short-Story Creative Writing79.9%—
EQ-Bench Creative Writing1266—
LiveBench Language34.6%—

Frequently asked questions

Is Gemma 3 27B better than GPT-5.5 Instant?

GPT-5.5 Instant is the stronger model overall, scoring 42.7 to 30.8 on the Noometry Index.

Is Gemma 3 27B or GPT-5.5 Instant better for coding?

GPT-5.5 Instant scores higher on coding benchmarks: 44.3 versus 22.5 in the Noometry coding category.

How many benchmarks do Gemma 3 27B and GPT-5.5 Instant share?

24 benchmarks have published results for both models. Gemma 3 27B has 43 scored results on Noometry and GPT-5.5 Instant has 27.

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