Model comparison
Granite 3.1 2b Instruct vs Grok 4.3
Grok 4.3 is the stronger model overall, scoring 43.8 to 33.2 on the Noometry Index.
Last verified . 12 shared benchmarks.
Summary
- They share 12 benchmarks with published results for both. Granite 3.1 2b Instruct scores higher in 0 categories and Grok 4.3 in 8 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in writing & preference, where Grok 4.3 leads 58.5 to 34.1.
- Granite 3.1 2b Instruct has downloadable open weights; the other is API-only.
Side by side
| Granite 3.1 2b Instruct | Grok 4.3 | |
|---|---|---|
| Provider | IBM | xAI |
| Noometry Index | 33.2 | 43.8 |
| Released | — | 2026-04-17 |
| Weights | Open | Proprietary |
| Context window | — | 1M |
| Max output | — | 30K |
| Input $ / M tokens | — | $1.25 |
| Output $ / M tokens | — | $2.50 |
| Results tracked | 12 | 40 |
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Category by category
Coding Grok 4.3 leads
Granite 3.1 2b Instruct: 33.4 (#257), Grok 4.3: 41.6 (#121)
| Benchmark | Granite 3.1 2b Instruct | Grok 4.3 |
|---|---|---|
| LMArena Coding | 1149 | 1415 |
| LMArena WebDev | — | 1357 |
| SciCode | — | 47.3% |
| WeirdML | — | 49.9% |
| ALE-Bench | — | 944.17 |
Agentic & Tool Use Not comparable
Granite 3.1 2b Instruct: —, Grok 4.3: 27.7 (#99)
| Benchmark | Granite 3.1 2b Instruct | Grok 4.3 |
|---|---|---|
| GDP.pdf | — | 8% |
| LMArena Search | — | 1165 |
| Vending-Bench 2 | — | 35.26 |
Reasoning Grok 4.3 leads
Granite 3.1 2b Instruct: 22.0 (#209), Grok 4.3: 35.9 (#68)
| Benchmark | Granite 3.1 2b Instruct | Grok 4.3 |
|---|---|---|
| LMArena Hard Prompts | 1138 | 1396 |
| NYT Connections (extended) | — | 55.2% |
| CritPt | — | 8% |
| Chess Puzzles | — | 25% |
| DTBench | — | 90.7% |
| LMCA | — | 38.3% |
| Epoch Capabilities Index | — | 149.16 |
| ForecastBench | — | 60.3 |
Math Grok 4.3 leads
Granite 3.1 2b Instruct: 33.1 (#206), Grok 4.3: 46.0 (#74)
| Benchmark | Granite 3.1 2b Instruct | Grok 4.3 |
|---|---|---|
| LMArena Math | 1159 | 1388 |
| FrontierMath (Tiers 1-3) | — | 42.8% |
| FrontierMath Tier 4 | — | 14.6% |
| OTIS Mock AIME 2024-2025 | — | 93.3% |
| ProofBench | — | 11% |
Knowledge Grok 4.3 leads
Granite 3.1 2b Instruct: 30.8 (#224), Grok 4.3: 52.5 (#62)
| Benchmark | Granite 3.1 2b Instruct | Grok 4.3 |
|---|---|---|
| LMArena Expert | 1131 | 1385 |
| GPQA Diamond | — | 88.8% |
| SimpleQA Verified | — | 33.2% |
Multimodal Not comparable
Granite 3.1 2b Instruct: —, Grok 4.3: 31.6 (#104)
| Benchmark | Granite 3.1 2b Instruct | Grok 4.3 |
|---|---|---|
| LMArena Vision | — | 1229 |
| Blueprint-Bench 2 | — | 0% |
Multilingual Grok 4.3 leads
Granite 3.1 2b Instruct: 29.1 (#269), Grok 4.3: 50.5 (#120)
| Benchmark | Granite 3.1 2b Instruct | Grok 4.3 |
|---|---|---|
| LMArena Non-English | 1068 | 1385 |
| LMArena Chinese | 1139 | 1422 |
| LMArena Russian | 1063 | 1399 |
| LMArena French | — | 1412 |
| LMArena German | — | 1395 |
| LMArena Japanese | — | 1379 |
| LMArena Korean | — | 1356 |
| LMArena Spanish | — | 1398 |
Instruction Following Grok 4.3 leads
Granite 3.1 2b Instruct: 57.7 (#264), Grok 4.3: 72.1 (#140)
| Benchmark | Granite 3.1 2b Instruct | Grok 4.3 |
|---|---|---|
| LMArena Instruction Following | 1116 | 1366 |
Long Context Grok 4.3 leads
Granite 3.1 2b Instruct: 35.0 (#244), Grok 4.3: 42.5 (#123)
| Benchmark | Granite 3.1 2b Instruct | Grok 4.3 |
|---|---|---|
| LMArena Longer Query | 1155 | 1393 |
Writing & Preference Grok 4.3 leads
Granite 3.1 2b Instruct: 34.1 (#274), Grok 4.3: 58.5 (#118)
| Benchmark | Granite 3.1 2b Instruct | Grok 4.3 |
|---|---|---|
| LMArena Text | 1127 | 1397 |
| LMArena Creative Writing | 1116 | 1380 |
| LMArena Multi-Turn | 1099 | 1406 |
| EQ-Bench 4 | — | 1075 |
Frequently asked questions
Is Granite 3.1 2b Instruct better than Grok 4.3?
Grok 4.3 is the stronger model overall, scoring 43.8 to 33.2 on the Noometry Index.
Is Granite 3.1 2b Instruct or Grok 4.3 better for coding?
Grok 4.3 scores higher on coding benchmarks: 41.6 versus 33.4 in the Noometry coding category.
How many benchmarks do Granite 3.1 2b Instruct and Grok 4.3 share?
12 benchmarks have published results for both models. Granite 3.1 2b Instruct has 12 scored results on Noometry and Grok 4.3 has 40.