# Gemma 3 12B vs Grok 4.20 Multi-Agent

> Grok 4.20 Multi-Agent is the stronger model overall, scoring 45.5 to 31.8 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.

- Canonical page: https://noometry.com/compare/gemma-3-12b-vs-grok-4-20-multi-agent
- Last updated: 2026-10-10
- Shared benchmarks: 12

## 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 42.4 to 15.2.
- 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.

## Snapshot

| | Gemma 3 12B | Grok 4.20 Multi-Agent |
|---|---|---|
| Provider | Google | xAI |
| Noometry Index | 31.8 | 45.5 |
| Rank | 255 | 62 |
| Context | 131K | 1M |
| Input $/M | $0.05 | $1.25 |
| Output $/M | $0.15 | $2.50 |
| Weights | Open | Proprietary |

## Coding

- Gemma 3 12B: 31.2 (#276)
- Grok 4.20 Multi-Agent: 42.4 (#91)

| Benchmark | Gemma 3 12B | Grok 4.20 Multi-Agent |
|---|---|---|
| LMArena Coding | 1281 | 1458 |
| SciCode | 17.4% | — |

## Agentic & Tool Use

- Gemma 3 12B: 25.3 (#101)
- Grok 4.20 Multi-Agent: —

| Benchmark | Gemma 3 12B | Grok 4.20 Multi-Agent |
|---|---|---|
| Berkeley Function Calling Leaderboard | 30.4% | — |
| LMArena Search | — | 1204 |

## Reasoning

- Gemma 3 12B: 15.2 (#307)
- Grok 4.20 Multi-Agent: 42.4 (#44)

| 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 | 123.49 | — |

## Math

- Gemma 3 12B: 21.0 (#273)
- Grok 4.20 Multi-Agent: 36.6 (#106)

| Benchmark | Gemma 3 12B | Grok 4.20 Multi-Agent |
|---|---|---|
| LMArena Math | 1307 | 1441 |
| OTIS Mock AIME 2024-2025 | 16.7% | — |

## Knowledge

- Gemma 3 12B: 26.5 (#250)
- Grok 4.20 Multi-Agent: 39.7 (#116)

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

## Multimodal

- Gemma 3 12B: —
- Grok 4.20 Multi-Agent: 39.8 (#44)

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

## Multilingual

- Gemma 3 12B: 45.9 (#160)
- Grok 4.20 Multi-Agent: 54.6 (#40)

| 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 | — | 1467 |
| LMArena Japanese | — | 1405 |
| LMArena Korean | — | 1416 |
| LMArena Spanish | — | 1447 |

## Instruction Following

- Gemma 3 12B: 68.8 (#179)
- Grok 4.20 Multi-Agent: 75.0 (#80)

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

## Long Context

- Gemma 3 12B: 40.0 (#157)
- Grok 4.20 Multi-Agent: 43.7 (#84)

| Benchmark | Gemma 3 12B | Grok 4.20 Multi-Agent |
|---|---|---|
| LMArena Longer Query | 1317 | 1430 |

## Writing & Preference

- Gemma 3 12B: 47.7 (#205)
- Grok 4.20 Multi-Agent: 64.1 (#57)

| Benchmark | Gemma 3 12B | Grok 4.20 Multi-Agent |
|---|---|---|
| LMArena Text | 1334 | 1450 |
| LMArena Creative Writing | 1331 | 1435 |
| LMArena Multi-Turn | 1334 | 1451 |
| EQ-Bench Creative Writing | 1126 | — |

## FAQ

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

Grok 4.20 Multi-Agent is the stronger model overall, scoring 45.5 to 31.8 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.

### 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: 42.4 versus 31.2 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.