Model comparison

Gemma 3 4B vs Grok 4.20 Multi-Agent

Grok 4.20 Multi-Agent is the stronger model overall, scoring 46.2 to 28.1 on the Noometry Index. Gemma 3 4B costs 31× 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 10, 2026. 12 shared benchmarks.

Gemma 3 4B

Google

28.1

Rank #326 Confirmed

Grok 4.20 Multi-Agent xAI

46.2

Rank #65 Confirmed

Summary

They share 12 benchmarks with published results for both. Gemma 3 4B 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 13.2.
Gemma 3 4B is cheaper at $0.04 / $0.08 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 4B has downloadable open weights; the other is API-only.

Side by side

Gemma 3 4B and Grok 4.20 Multi-Agent specifications
	Gemma 3 4B	Grok 4.20 Multi-Agent
Provider	Google	xAI
Noometry Index	28.1	46.2
Released	2025-03-12	2026-03-09
Weights	Open	Proprietary
Context window	131K	1M
Max output	4K	30K
Input $ / M tokens	$0.04	$1.25
Output $ / M tokens	$0.08	$2.50
Results tracked	22	20

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Category by category

Coding Grok 4.20 Multi-Agent leads

Gemma 3 4B: 35.9 (#215), Grok 4.20 Multi-Agent: 43.0 (#92)

Coding benchmarks
Benchmark	Gemma 3 4B	Grok 4.20 Multi-Agent
LMArena Coding	1230	1457

Agentic & Tool Use Not comparable

Gemma 3 4B: 20.9 (#142), Grok 4.20 Multi-Agent: —

Agentic & Tool Use benchmarks
Benchmark	Gemma 3 4B	Grok 4.20 Multi-Agent
Berkeley Function Calling Leaderboard	19.6%	—
LMArena Search	—	1204

Reasoning Grok 4.20 Multi-Agent leads

Gemma 3 4B: 13.2 (#335), Grok 4.20 Multi-Agent: 43.9 (#48)

Reasoning benchmarks
Benchmark	Gemma 3 4B	Grok 4.20 Multi-Agent
LMArena Hard Prompts	1253	1448
Kagi LLM Benchmark	25.2%	—
NYT Connections (extended)	—	89.6%
Chess Puzzles	0%	—
DTBench	50.9%	—
LMCA	2.8%	—
Epoch Capabilities Index	116.02	—

Math Grok 4.20 Multi-Agent leads

Gemma 3 4B: 16.8 (#292), Grok 4.20 Multi-Agent: 39.4 (#104)

Math benchmarks
Benchmark	Gemma 3 4B	Grok 4.20 Multi-Agent
LMArena Math	1239	1442
OTIS Mock AIME 2024-2025	7.5%	—

Knowledge Grok 4.20 Multi-Agent leads

Gemma 3 4B: 11.8 (#299), Grok 4.20 Multi-Agent: 40.4 (#119)

Knowledge benchmarks
Benchmark	Gemma 3 4B	Grok 4.20 Multi-Agent
LMArena Expert	1223	1445
GPQA Diamond	23.2%	—
Vectara Hallucination Rate	6.4%	—

Multimodal Not comparable

Gemma 3 4B: —, Grok 4.20 Multi-Agent: 40.5 (#48)

Multimodal benchmarks
Benchmark	Gemma 3 4B	Grok 4.20 Multi-Agent
LMArena Vision	—	1259

Multilingual Grok 4.20 Multi-Agent leads

Gemma 3 4B: 42.5 (#194), Grok 4.20 Multi-Agent: 54.4 (#43)

Multilingual benchmarks
Benchmark	Gemma 3 4B	Grok 4.20 Multi-Agent
LMArena Non-English	1273	1440
LMArena German	1281	1456
LMArena Russian	1294	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 4B: 65.2 (#225), Grok 4.20 Multi-Agent: 74.8 (#84)

Instruction Following benchmarks
Benchmark	Gemma 3 4B	Grok 4.20 Multi-Agent
LMArena Instruction Following	1239	1420

Long Context Grok 4.20 Multi-Agent leads

Gemma 3 4B: 38.7 (#194), Grok 4.20 Multi-Agent: 43.7 (#88)

Long Context benchmarks
Benchmark	Gemma 3 4B	Grok 4.20 Multi-Agent
LMArena Longer Query	1273	1431

Writing & Preference Grok 4.20 Multi-Agent leads

Gemma 3 4B: 42.0 (#239), Grok 4.20 Multi-Agent: 64.0 (#59)

Writing & Preference benchmarks
Benchmark	Gemma 3 4B	Grok 4.20 Multi-Agent
LMArena Text	1291	1450
LMArena Creative Writing	1271	1436
LMArena Multi-Turn	1255	1452
EQ-Bench Creative Writing	1068	—

Frequently asked questions

Is Gemma 3 4B better than Grok 4.20 Multi-Agent?

Which is cheaper, Gemma 3 4B or Grok 4.20 Multi-Agent?

Gemma 3 4B is cheaper. It lists at $0.04 per million input tokens and $0.08 per million output tokens; Grok 4.20 Multi-Agent lists at $1.25 and $2.50.

Is Gemma 3 4B or Grok 4.20 Multi-Agent better for coding?

Grok 4.20 Multi-Agent scores higher on coding benchmarks: 43.0 versus 35.9 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 4B and Grok 4.20 Multi-Agent share?

12 benchmarks have published results for both models. Gemma 3 4B has 22 scored results on Noometry and Grok 4.20 Multi-Agent has 20.