# Granite 4.2 3B vs Grok 4.20

> Side-by-side benchmark comparison for Granite 4.2 3B and Grok 4.20 across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/granite-4-2-3b-vs-grok-4-20-beta
- Last updated: September 10, 2026

- Shared sourced benchmarks: 0
- HTML indexing: indexable
- Ranking lane: BenchAlign v5

## Quick Verdict

No benchmark verdict yet: there is no shared sourced benchmark row for Granite 4.2 3B and Grok 4.20.

## Summary

- Granite 4.2 3B and Grok 4.20 do not currently share a sourced benchmark row. The mirror therefore compares metadata, pricing, context windows, and each model's separately reported coverage without naming a benchmark winner.

## Model Snapshot

| Property | Granite 4.2 3B | Grok 4.20 |
|----------|----------|----------|
| Creator | IBM | xAI |
| Type | Open Weight | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 128K | 2M |
| Independent public score (not head-to-head) | null | 67.13 |
| Benchmarks Covered | 9 | 23 |
| Pricing (input/output) | $0.00 / $0.00 | $2.00 / $6.00 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- Granite 4.2 3B public-lane score: Coming soon
- Grok 4.20 public-lane score: 26.7 (Supported · #145/152)

| Benchmark | Granite 4.2 3B | Grok 4.20 | Winner |
|-----------|-----------|-----------|--------|
| τ³-bench results | 45.8% | Coming soon | Coming soon |
| BFCL v4 | 52.4% | Coming soon | Coming soon |
| 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: Insufficient shared evidence
- Granite 4.2 3B public-lane score: Coming soon
- Grok 4.20 public-lane score: 28.2 (Supported · #141/151)

| Benchmark | Granite 4.2 3B | Grok 4.20 | Winner |
|-----------|-----------|-----------|--------|
| LiveCodeBench v6 | 69.7% | Coming soon | Coming soon |
| SciCode | 24.1% | 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: Insufficient shared evidence
- Granite 4.2 3B public-lane score: Coming soon
- Grok 4.20 public-lane score: 34.6 (#43/48)

| Benchmark | Granite 4.2 3B | Grok 4.20 | Winner |
|-----------|-----------|-----------|--------|
| MMMU-Pro | Coming soon | 75.2% | Coming soon |
| CharXiv | Coming soon | 60.9% | Coming soon |
| ERQA | Coming soon | 54.1% | Coming soon |
| SimpleVQA | Coming soon | 57.4% | Coming soon |
| MedXpertQA (MM) | Coming soon | 65.8% | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- Granite 4.2 3B public-lane score: 37.7 (Unranked · 2 rankable rows)
- Grok 4.20 public-lane score: 34.2 (Unranked · 2 rankable rows)

| Benchmark | Granite 4.2 3B | Grok 4.20 | Winner |
|-----------|-----------|-----------|--------|
| ARC-AGI-2 | Coming soon | 53.3% | Coming soon |
| ARC-AGI-3 | Coming soon | 0.1% | Coming soon |

### Knowledge

- Winner: Insufficient shared evidence
- Granite 4.2 3B public-lane score: Coming soon
- Grok 4.20 public-lane score: 49.4 (Supported · #85/183)

| Benchmark | Granite 4.2 3B | Grok 4.20 | Winner |
|-----------|-----------|-----------|--------|
| GPQA | 54.8% | Coming soon | Coming soon |
| MMLU-Pro | 67.8% | Coming soon | Coming soon |
| GPQA-D | Coming soon | 88.5% | Coming soon |
| HLE w/o tools | Coming soon | 31.6% | 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: Insufficient shared evidence
- Granite 4.2 3B public-lane score: Coming soon
- Grok 4.20 public-lane score: Coming soon

| Benchmark | Granite 4.2 3B | Grok 4.20 | Winner |
|-----------|-----------|-----------|--------|
| IFBench | 74.3% | Coming soon | Coming soon |

### Mathematics

- Winner: Insufficient shared evidence
- Granite 4.2 3B public-lane score: Coming soon
- Grok 4.20 public-lane score: Coming soon

| Benchmark | Granite 4.2 3B | Grok 4.20 | Winner |
|-----------|-----------|-----------|--------|
| AIME 2025 | 78.3% | Coming soon | Coming soon |
| HMMT Feb 2025 | 66.7% | Coming soon | Coming soon |

## FAQ

### Can I compare Granite 4.2 3B and Grok 4.20 on BenchLM yet?

Not fully yet. BenchLM is tracking both models, but sourced benchmark coverage is still incomplete for a fair score-level comparison.

### Why does this page show "coming soon" values?

BenchLM only calls winners when public benchmark coverage is available on both sides of the comparison.

## Related Comparisons

- [Granite 4.2 3B vs Granite 4.2 8B](/compare/granite-4-2-3b-vs-granite-4-2-8b)
- [Grok 4.20 vs Granite 4.2 8B](/compare/granite-4-2-8b-vs-grok-4-20-beta)
- [Granite 4.2 3B vs Granite 4.2 30B](/compare/granite-4-2-30b-vs-granite-4-2-3b)
- [Grok 4.20 vs Granite 4.2 30B](/compare/granite-4-2-30b-vs-grok-4-20-beta)

## Explore More

- [Granite 4.2 3B profile](/models/granite-4-2-3b)
- [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)