Model comparison
Granite 4.2 8B vs Grok 4.20 (Non-Reasoning)
Grok 4.20 (Non-Reasoning) is the stronger model overall, scoring 48.6 to 40.5 on the Noometry Index. Granite 4.2 8B costs 15× less per token, which makes it the better buy when Grok 4.20 (Non-Reasoning)'s lead doesn't matter for your workload.
Last verified . 11 shared benchmarks.
Summary
- They share 11 benchmarks with published results for both. Granite 4.2 8B scores higher in 0 categories and Grok 4.20 (Non-Reasoning) in 7 categories; 7 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Grok 4.20 (Non-Reasoning) leads 52.3 to 26.6.
- Granite 4.2 8B is cheaper at $0.06 / $0.25 per million input/output tokens, against $1.25 / $2.50 for Grok 4.20 (Non-Reasoning).
- Grok 4.20 (Non-Reasoning) accepts more context: 1M tokens versus 131K.
- Granite 4.2 8B has downloadable open weights; the other is API-only.
Side by side
| Granite 4.2 8B | Grok 4.20 (Non-Reasoning) | |
|---|---|---|
| Provider | IBM | xAI |
| Noometry Index | 40.5 | 48.6 |
| Released | — | 2026-02-17 |
| Weights | Open | Proprietary |
| Context window | 131K | 1M |
| Max output | 118K | 30K |
| Input $ / M tokens | $0.06 | $1.25 |
| Output $ / M tokens | $0.25 | $2.50 |
| Results tracked | 11 | 46 |
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Category by category
Coding Grok 4.20 (Non-Reasoning) leads
Granite 4.2 8B: 40.5 (#137), Grok 4.20 (Non-Reasoning): 42.1 (#112)
| Benchmark | Granite 4.2 8B | Grok 4.20 (Non-Reasoning) |
|---|---|---|
| LMArena Coding | 1380 | 1459 |
| LMArena WebDev | — | 1375 |
| WeirdML | — | 52.3% |
| ALE-Bench | — | 1,150 |
Agentic & Tool Use Not comparable
Granite 4.2 8B: —, Grok 4.20 (Non-Reasoning): 34.4 (#46)
| Benchmark | Granite 4.2 8B | Grok 4.20 (Non-Reasoning) |
|---|---|---|
| Terminal-Bench | — | 57.3% |
| τ²-bench Banking | — | 18% |
| LMArena Search | — | 1189 |
| Vending-Bench 2 | — | 4,663 |
Reasoning Grok 4.20 (Non-Reasoning) leads
Granite 4.2 8B: 26.6 (#131), Grok 4.20 (Non-Reasoning): 52.3 (#32)
| Benchmark | Granite 4.2 8B | Grok 4.20 (Non-Reasoning) |
|---|---|---|
| LMArena Hard Prompts | 1329 | 1451 |
| ARC-AGI-2 | — | 65.1% |
| Kagi LLM Benchmark | — | 75% |
| NYT Connections (extended) | — | 85.4% |
| ARC-AGI-1 | — | 89.5% |
| Chess Puzzles | — | 24% |
| Thematic Generalization | — | 63.8% |
| DTBench | — | 90.1% |
| LMCA | — | 38.7% |
| Epoch Capabilities Index | — | 151.98 |
| ForecastBench | — | 61.4 |
Math Not comparable
Granite 4.2 8B: —, Grok 4.20 (Non-Reasoning): 48.2 (#65)
| Benchmark | Granite 4.2 8B | Grok 4.20 (Non-Reasoning) |
|---|---|---|
| FrontierMath (Tiers 1-3) | — | 44.9% |
| FrontierMath Tier 4 | — | 17.1% |
| OTIS Mock AIME 2024-2025 | — | 92.2% |
| ProofBench | — | 14% |
| LMArena Math | — | 1455 |
Knowledge Grok 4.20 (Non-Reasoning) leads
Granite 4.2 8B: 38.4 (#145), Grok 4.20 (Non-Reasoning): 52.8 (#60)
| Benchmark | Granite 4.2 8B | Grok 4.20 (Non-Reasoning) |
|---|---|---|
| LMArena Expert | 1384 | 1439 |
| GPQA Diamond | — | 89.3% |
| SimpleQA Verified | — | 30.2% |
Multimodal Not comparable
Granite 4.2 8B: —, Grok 4.20 (Non-Reasoning): 33.3 (#98)
| Benchmark | Granite 4.2 8B | Grok 4.20 (Non-Reasoning) |
|---|---|---|
| LMArena Vision | — | 1263 |
| Blueprint-Bench 2 | — | 0% |
| LMArena Document | — | 1416 |
Multilingual Grok 4.20 (Non-Reasoning) leads
Granite 4.2 8B: 44.5 (#178), Grok 4.20 (Non-Reasoning): 54.5 (#40)
| Benchmark | Granite 4.2 8B | Grok 4.20 (Non-Reasoning) |
|---|---|---|
| LMArena Non-English | 1302 | 1441 |
| LMArena Chinese | 1366 | 1481 |
| LMArena Russian | 1285 | 1458 |
| LMArena French | — | 1476 |
| LMArena German | — | 1465 |
| LMArena Japanese | — | 1449 |
| LMArena Korean | — | 1417 |
| LMArena Spanish | — | 1443 |
Instruction Following Grok 4.20 (Non-Reasoning) leads
Granite 4.2 8B: 68.7 (#184), Grok 4.20 (Non-Reasoning): 74.8 (#83)
| Benchmark | Granite 4.2 8B | Grok 4.20 (Non-Reasoning) |
|---|---|---|
| LMArena Instruction Following | 1301 | 1420 |
Long Context Grok 4.20 (Non-Reasoning) leads
Granite 4.2 8B: 40.3 (#159), Grok 4.20 (Non-Reasoning): 45.5 (#34)
| Benchmark | Granite 4.2 8B | Grok 4.20 (Non-Reasoning) |
|---|---|---|
| LMArena Longer Query | 1324 | 1437 |
| CL-bench | — | 22.2% |
| CL-bench Life | — | 11.9% |
Writing & Preference Grok 4.20 (Non-Reasoning) leads
Granite 4.2 8B: 49.6 (#189), Grok 4.20 (Non-Reasoning): 65.7 (#44)
| Benchmark | Granite 4.2 8B | Grok 4.20 (Non-Reasoning) |
|---|---|---|
| LMArena Text | 1320 | 1451 |
| LMArena Creative Writing | 1236 | 1438 |
| LMArena Multi-Turn | 1301 | 1456 |
| EQ-Bench Creative Writing | — | 1574 |
Frequently asked questions
Is Granite 4.2 8B better than Grok 4.20 (Non-Reasoning)?
Grok 4.20 (Non-Reasoning) is the stronger model overall, scoring 48.6 to 40.5 on the Noometry Index. Granite 4.2 8B costs 15× less per token, which makes it the better buy when Grok 4.20 (Non-Reasoning)'s lead doesn't matter for your workload.
Which is cheaper, Granite 4.2 8B or Grok 4.20 (Non-Reasoning)?
Granite 4.2 8B is cheaper. It lists at $0.06 per million input tokens and $0.25 per million output tokens; Grok 4.20 (Non-Reasoning) lists at $1.25 and $2.50.
Is Granite 4.2 8B or Grok 4.20 (Non-Reasoning) better for coding?
Grok 4.20 (Non-Reasoning) scores higher on coding benchmarks: 42.1 versus 40.5 in the Noometry coding category.
Which has the bigger context window?
Grok 4.20 (Non-Reasoning) does, with 1M tokens against 131K.
How many benchmarks do Granite 4.2 8B and Grok 4.20 (Non-Reasoning) share?
11 benchmarks have published results for both models. Granite 4.2 8B has 11 scored results on Noometry and Grok 4.20 (Non-Reasoning) has 46.