Model comparison

Gemma 3 12B vs Grok 4.20 Multi-Agent

Grok 4.20 Multi-Agent is the stronger model overall, scoring 46.2 to 32.1 on the Noometry Index. Gemma 3 12B costs 21× less per token, which makes it the better buy when Grok 4.20 Multi-Agent's lead doesn't matter for your workload.

Last verified October 11, 2026. 12 shared benchmarks.

Gemma 3 12B

Google

32.1

Rank #262 Confirmed

Grok 4.20 Multi-Agent xAI

46.2

Rank #65 Confirmed

Summary

They share 12 benchmarks with published results for both. Gemma 3 12B scores higher in 0 categories and Grok 4.20 Multi-Agent in 8 categories; 8 gaps are clear of the uncertainty.
The widest gap is in reasoning, where Grok 4.20 Multi-Agent leads 43.9 to 15.7.
Gemma 3 12B is cheaper at $0.05 / $0.15 per million input/output tokens, against $1.25 / $2.50 for Grok 4.20 Multi-Agent.
Grok 4.20 Multi-Agent accepts more context: 1M tokens versus 131K.
Gemma 3 12B has downloadable open weights; the other is API-only.

Side by side

Gemma 3 12B and Grok 4.20 Multi-Agent specifications
	Gemma 3 12B	Grok 4.20 Multi-Agent
Provider	Google	xAI
Noometry Index	32.1	46.2
Released	2025-03-12	2026-03-09
Weights	Open	Proprietary
Context window	131K	1M
Max output	8K	30K
Input $ / M tokens	$0.05	$1.25
Output $ / M tokens	$0.15	$2.50
Results tracked	24	20

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Category by category

Coding Grok 4.20 Multi-Agent leads

Gemma 3 12B: 31.7 (#280), Grok 4.20 Multi-Agent: 43.0 (#92)

Coding benchmarks
Benchmark	Gemma 3 12B	Grok 4.20 Multi-Agent
LMArena Coding	1281	1457
SciCode	17.4%	—

Agentic & Tool Use Not comparable

Gemma 3 12B: 25.5 (#108), Grok 4.20 Multi-Agent: —

Agentic & Tool Use benchmarks
Benchmark	Gemma 3 12B	Grok 4.20 Multi-Agent
Berkeley Function Calling Leaderboard	30.4%	—
LMArena Search	—	1204

Reasoning Grok 4.20 Multi-Agent leads

Gemma 3 12B: 15.7 (#313), Grok 4.20 Multi-Agent: 43.9 (#48)

Reasoning benchmarks
Benchmark	Gemma 3 12B	Grok 4.20 Multi-Agent
LMArena Hard Prompts	1309	1448
NYT Connections (extended)	—	89.6%
CritPt	0%	—
Chess Puzzles	0%	—
DTBench	48.8%	—
LMCA	4.5%	—
Epoch Capabilities Index	123.5	—

Math Grok 4.20 Multi-Agent leads

Gemma 3 12B: 22.3 (#279), Grok 4.20 Multi-Agent: 39.4 (#104)

Math benchmarks
Benchmark	Gemma 3 12B	Grok 4.20 Multi-Agent
LMArena Math	1307	1442
OTIS Mock AIME 2024-2025	16.7%	—

Knowledge Grok 4.20 Multi-Agent leads

Gemma 3 12B: 26.5 (#257), Grok 4.20 Multi-Agent: 40.4 (#119)

Knowledge benchmarks
Benchmark	Gemma 3 12B	Grok 4.20 Multi-Agent
LMArena Expert	1248	1445
GPQA Diamond	39.5%	—
Vectara Hallucination Rate	4.4%	—

Multimodal Not comparable

Gemma 3 12B: —, Grok 4.20 Multi-Agent: 40.5 (#48)

Multimodal benchmarks
Benchmark	Gemma 3 12B	Grok 4.20 Multi-Agent
LMArena Vision	—	1259
MindCube	46.7%	—

Multilingual Grok 4.20 Multi-Agent leads

Gemma 3 12B: 45.7 (#165), Grok 4.20 Multi-Agent: 54.4 (#43)

Multilingual benchmarks
Benchmark	Gemma 3 12B	Grok 4.20 Multi-Agent
LMArena Non-English	1318	1440
LMArena German	1370	1456
LMArena Russian	1335	1457
LMArena Chinese	—	1475
LMArena French	—	1466
LMArena Japanese	—	1405
LMArena Korean	—	1416
LMArena Spanish	—	1447

Instruction Following Grok 4.20 Multi-Agent leads

Gemma 3 12B: 68.6 (#186), Grok 4.20 Multi-Agent: 74.8 (#84)

Instruction Following benchmarks
Benchmark	Gemma 3 12B	Grok 4.20 Multi-Agent
LMArena Instruction Following	1299	1420

Long Context Grok 4.20 Multi-Agent leads

Gemma 3 12B: 40.0 (#162), Grok 4.20 Multi-Agent: 43.7 (#88)

Long Context benchmarks
Benchmark	Gemma 3 12B	Grok 4.20 Multi-Agent
LMArena Longer Query	1317	1431

Writing & Preference Grok 4.20 Multi-Agent leads

Gemma 3 12B: 47.5 (#209), Grok 4.20 Multi-Agent: 64.0 (#59)

Writing & Preference benchmarks
Benchmark	Gemma 3 12B	Grok 4.20 Multi-Agent
LMArena Text	1334	1450
LMArena Creative Writing	1331	1436
LMArena Multi-Turn	1334	1452
EQ-Bench Creative Writing	1126	—

Frequently asked questions

Is Gemma 3 12B better than Grok 4.20 Multi-Agent?

Which is cheaper, Gemma 3 12B or Grok 4.20 Multi-Agent?

Gemma 3 12B is cheaper. It lists at $0.05 per million input tokens and $0.15 per million output tokens; Grok 4.20 Multi-Agent lists at $1.25 and $2.50.

Is Gemma 3 12B or Grok 4.20 Multi-Agent better for coding?

Grok 4.20 Multi-Agent scores higher on coding benchmarks: 43.0 versus 31.7 in the Noometry coding category.

Which has the bigger context window?

Grok 4.20 Multi-Agent does, with 1M tokens against 131K.

How many benchmarks do Gemma 3 12B and Grok 4.20 Multi-Agent share?

12 benchmarks have published results for both models. Gemma 3 12B has 24 scored results on Noometry and Grok 4.20 Multi-Agent has 20.