Model comparison

Gemma 3n E4b IT vs o3-pro

o3-pro is the stronger model overall, scoring 42.7 to 36.7 on the Noometry Index. Gemma 3n E4b IT costs 467× less per token, which makes it the better buy when o3-pro's lead doesn't matter for your workload.

Last verified October 10, 2026. 1 shared benchmarks.

Gemma 3n E4b IT

Google

36.7

Rank #203 Confirmed

o3-pro OpenAI

42.7

Rank #94 Confirmed

Summary

They share 1 benchmark with published results for both. Gemma 3n E4b IT scores higher in 1 category and o3-pro in 4 categories; 5 gaps are clear of the uncertainty.
The widest gap is in long context, where o3-pro leads 72.1 to 38.8.
The biggest single-benchmark swing is Kagi LLM Benchmark: 31.5% for Gemma 3n E4b IT and 72.1% for o3-pro.
Gemma 3n E4b IT is cheaper at $0.06 / $0.12 per million input/output tokens, against $20 / $80 for o3-pro.
o3-pro accepts more context: 200K tokens versus 33K.
Gemma 3n E4b IT has downloadable open weights; the other is API-only.

Side by side

Gemma 3n E4b IT and o3-pro specifications
	Gemma 3n E4b IT	o3-pro
Provider	Google	OpenAI
Noometry Index	36.7	42.7
Released	2025-05-20	2025-06-10
Weights	Open	Proprietary
Context window	33K	200K
Max output	33K	100K
Input $ / M tokens	$0.06	$20
Output $ / M tokens	$0.12	$80
Results tracked	18	12

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Category by category

Coding o3-pro leads

Gemma 3n E4b IT: 36.4 (#193), o3-pro: 55.1 (#22)

Coding benchmarks
Benchmark	Gemma 3n E4b IT	o3-pro
Aider Polyglot	—	84.9%
WeirdML	—	58.2%
LMArena Coding	1269	—

Reasoning o3-pro leads

Gemma 3n E4b IT: 19.2 (#239), o3-pro: 24.1 (#152)

Reasoning benchmarks
Benchmark	Gemma 3n E4b IT	o3-pro
Kagi LLM Benchmark	31.5%	72.1%
ARC-AGI-2	—	4.9%
ARC-AGI-1	—	59.3%
LMArena Hard Prompts	1284	—
DTBench	—	86.9%
LMCA	—	38.5%
Epoch Capabilities Index	—	147.43

Math Not comparable

Gemma 3n E4b IT: 32.5 (#186), o3-pro: —

Math benchmarks
Benchmark	Gemma 3n E4b IT	o3-pro
LMArena Math	1251	—

Knowledge Gemma 3n E4b IT leads

Gemma 3n E4b IT: 33.6 (#193), o3-pro: 29.0 (#234)

Knowledge benchmarks
Benchmark	Gemma 3n E4b IT	o3-pro
Confabulations	—	14.2%
Vectara Hallucination Rate	—	23.3%
LMArena Expert	1245	—

Multilingual Not comparable

Gemma 3n E4b IT: 43.5 (#179), o3-pro: —

Multilingual benchmarks
Benchmark	Gemma 3n E4b IT	o3-pro
LMArena Non-English	1285	—
LMArena Chinese	1310	—
LMArena French	1330	—
LMArena German	1312	—
LMArena Japanese	1274	—
LMArena Korean	1259	—
LMArena Russian	1288	—
LMArena Spanish	1305	—

Instruction Following Not comparable

Gemma 3n E4b IT: 66.3 (#205), o3-pro: —

Instruction Following benchmarks
Benchmark	Gemma 3n E4b IT	o3-pro
LMArena Instruction Following	1255	—

Long Context o3-pro leads

Gemma 3n E4b IT: 38.8 (#185), o3-pro: 72.1 (#1)

Long Context benchmarks
Benchmark	Gemma 3n E4b IT	o3-pro
Fiction.LiveBench	—	97.2%
LMArena Longer Query	1277	—

Writing & Preference o3-pro leads

Gemma 3n E4b IT: 50.3 (#181), o3-pro: 57.1 (#128)

Writing & Preference benchmarks
Benchmark	Gemma 3n E4b IT	o3-pro
LMArena Text	1306	—
LMArena Creative Writing	1287	—
Short-Story Creative Writing	—	84.4%
LMArena Multi-Turn	1276	—

Frequently asked questions

Is Gemma 3n E4b IT better than o3-pro?

Which is cheaper, Gemma 3n E4b IT or o3-pro?

Gemma 3n E4b IT is cheaper. It lists at $0.06 per million input tokens and $0.12 per million output tokens; o3-pro lists at $20 and $80.

Is Gemma 3n E4b IT or o3-pro better for coding?

o3-pro scores higher on coding benchmarks: 55.1 versus 36.4 in the Noometry coding category.

Which has the bigger context window?

o3-pro does, with 200K tokens against 33K.

How many benchmarks do Gemma 3n E4b IT and o3-pro share?

1 benchmark has published results for both models. Gemma 3n E4b IT has 18 scored results on Noometry and o3-pro has 12.