# Gemma 4 12B vs Grok 4.20

> Side-by-side benchmark comparison for Gemma 4 12B and Grok 4.20 across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/gemma-4-12b-vs-grok-4-20-beta
- Last updated: September 4, 2026

- Shared sourced benchmarks: 4
- HTML indexing: indexable
- Ranking lane: BenchAlign v5

## Quick Verdict

Pick Grok 4.20 if you want the stronger benchmark profile. Gemma 4 12B only makes more sense when its price, context window, or workload-specific category wins matter more than the overall score.

## Summary

- Grok 4.20 leads overall 67.01 to 46.64.
- The clearest category separation is in agentic, where the averages are 47.9 for Gemma 4 12B and 26.5 for Grok 4.20.
- The biggest single benchmark swing is HLE w/o tools in Knowledge, with scores of 5.2% and 31.6%.
- Grok 4.20 also has the larger context window at 2M.

## Model Snapshot

| Property | Gemma 4 12B | Grok 4.20 |
|----------|----------|----------|
| Creator | Google | xAI |
| Type | Open Weight | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 256K | 2M |
| Overall Score | 46.64 | 67.01 |
| Benchmarks Covered | 12 | 23 |
| Pricing (input/output) | N/A | $2.00 / $6.00 |

## Category Breakdown

### Agentic

- Winner: Coming soon
- Gemma 4 12B public-lane score: 47.9 (Estimated · #81/151)
- Grok 4.20 public-lane score: 26.5 (Supported · #144/151)

| Benchmark | Gemma 4 12B | Grok 4.20 | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.0 | Coming soon | 47.1% | Coming soon |
| DeepSearchQA | Coming soon | 62.8% | Coming soon |
| Gert Labs | Coming soon | 38.36% | Coming soon |
| Terminal-Bench 2.1 (Vals) | Coming soon | 44.2% | Coming soon |

### Coding

- Winner: Coming soon
- Gemma 4 12B public-lane score: 46.6 (Estimated · #97/183)
- Grok 4.20 public-lane score: 28.2 (Supported · #171/183)

| Benchmark | Gemma 4 12B | Grok 4.20 | Winner |
|-----------|-----------|-----------|--------|
| LiveCodeBench v6 | 72.0% | Coming soon | Coming soon |
| LiveCodeBench Pro | Coming soon | 74.2% | Coming soon |
| SWE-bench Verified | Coming soon | 76.7% | Coming soon |
| SWE-bench Pro | Coming soon | 51.8% | Coming soon |
| Vibe Code Bench | Coming soon | 4.06% | Coming soon |
| LiveCodeBench (Vals) | Coming soon | 84.3% | Coming soon |
| SWE-bench (Vals) | Coming soon | 72.2% | Coming soon |

### Multimodal & Grounded

- Winner: Coming soon
- Gemma 4 12B public-lane score: 26.1 (#44/48)
- Grok 4.20 public-lane score: 34.6 (#43/48)

| Benchmark | Gemma 4 12B | Grok 4.20 | Winner |
|-----------|-----------|-----------|--------|
| MMMU-Pro | 69.1% | 75.2% | Grok 4.20 |
| MathVision | 79.7% | Coming soon | Coming soon |
| MedXpertQA (MM) | 48.7% | 65.8% | Grok 4.20 |
| CharXiv | Coming soon | 60.9% | Coming soon |
| ERQA | Coming soon | 54.1% | Coming soon |
| SimpleVQA | Coming soon | 57.4% | Coming soon |

### Reasoning

- Winner: Coming soon
- Gemma 4 12B public-lane score: 34 (Unranked · 4 rankable rows)
- Grok 4.20 public-lane score: 34.2 (Unranked · 2 rankable rows)

| Benchmark | Gemma 4 12B | Grok 4.20 | Winner |
|-----------|-----------|-----------|--------|
| BBH | 53% | Coming soon | Coming soon |
| MRCRv2 | 43.4% | Coming soon | Coming soon |
| ARC-AGI-2 | Coming soon | 53.3% | Coming soon |
| ARC-AGI-3 | Coming soon | 0.1% | Coming soon |

### Knowledge

- Winner: Grok 4.20
- Gemma 4 12B public-lane score: 40.4 (Supported · #138/181)
- Grok 4.20 public-lane score: 48.7 (Supported · #97/181)

| Benchmark | Gemma 4 12B | Grok 4.20 | Winner |
|-----------|-----------|-----------|--------|
| GPQA | 78.8% | Coming soon | Coming soon |
| GPQA-D | 78.8% | 88.5% | Grok 4.20 |
| MMLU-Pro | 77.2% | Coming soon | Coming soon |
| HLE w/o tools | 5.2% | 31.6% | Grok 4.20 |
| MMMLU | 83.4% | Coming soon | Coming soon |
| HealthBench Hard | Coming soon | 20.3% | Coming soon |
| MedXpertQA (Text) | Coming soon | 50.2% | Coming soon |
| GPQA Diamond (Vals) | Coming soon | 88.6% | Coming soon |
| MMLU-Pro (Vals) | Coming soon | 86.3% | Coming soon |

### Instruction Following

- Winner: Coming soon
- Gemma 4 12B public-lane score: 89.8 (#21/120)
- Grok 4.20 public-lane score: Coming soon

### Mathematics

- Winner: Coming soon
- Gemma 4 12B public-lane score: 57.6 (Unranked · 1 rankable row)
- Grok 4.20 public-lane score: Coming soon

| Benchmark | Gemma 4 12B | Grok 4.20 | Winner |
|-----------|-----------|-----------|--------|
| AIME26 | 77.5% | Coming soon | Coming soon |

## FAQ

### Which is better overall, Gemma 4 12B or Grok 4.20?

Grok 4.20 is ahead overall on BenchLM right now.

### Where is the biggest gap between Gemma 4 12B and Grok 4.20?

The widest category gap is in agentic, where the averages are 47.9 for Gemma 4 12B and 26.5 for Grok 4.20.

### How many benchmarks does Gemma 4 12B cover on BenchLM?

Gemma 4 12B currently has 12 sourced benchmark scores on BenchLM.

### How many benchmarks does Grok 4.20 cover on BenchLM?

Grok 4.20 currently has 23 sourced benchmark scores on BenchLM.

## Related Comparisons

- [Gemma 4 12B vs Gemma 4 31B](/compare/gemma-4-12b-vs-gemma-4-31b)
- [Grok 4.20 vs Gemma 4 31B](/compare/gemma-4-31b-vs-grok-4-20-beta)
- [Gemma 4 12B vs Gemma 4 26B A4B](/compare/gemma-4-12b-vs-gemma-4-26b-a4b)
- [Grok 4.20 vs Gemma 4 26B A4B](/compare/gemma-4-26b-a4b-vs-grok-4-20-beta)

## Explore More

- [Gemma 4 12B profile](/models/gemma-4-12b)
- [Grok 4.20 profile](/models/grok-4-20-beta)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)