Model comparison
Grok 4.1 vs Mercury 2
Grok 4.1 is the stronger model overall, scoring 41.5 to 39.1 on the Noometry Index.
Last verified . 12 shared benchmarks.
Summary
- They share 12 benchmarks with published results for both. Grok 4.1 scores higher in 7 categories and Mercury 2 in 0 categories; 6 gaps are clear of the uncertainty.
- The widest gap is in writing & preference, where Grok 4.1 leads 62.4 to 53.8.
Side by side
| Grok 4.1 | Mercury 2 | |
|---|---|---|
| Provider | xAI | Inception |
| Noometry Index | 41.5 | 39.1 |
| Released | 2025-11-17 | 2026-02-20 |
| Weights | Proprietary | Proprietary |
| Context window | — | 128K |
| Max output | — | 50K |
| Input $ / M tokens | — | $0.25 |
| Output $ / M tokens | — | $0.75 |
| Results tracked | 19 | 17 |
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Category by category
Coding Too close to call
Grok 4.1: 33.7 (#253), Mercury 2: 33.5 (#255)
| Benchmark | Grok 4.1 | Mercury 2 |
|---|---|---|
| LMArena WebDev | 1214 | 1171 |
| LMArena Coding | 1445 | 1391 |
| SciCode | — | 38.7% |
| WeirdML | — | 43.2% |
| ALE-Bench | — | 785.58 |
Agentic & Tool Use Not comparable
Grok 4.1: 34.1 (#49), Mercury 2: —
| Benchmark | Grok 4.1 | Mercury 2 |
|---|---|---|
| Cybench | 39% | — |
Reasoning Grok 4.1 leads
Grok 4.1: 29.5 (#91), Mercury 2: 23.8 (#170)
| Benchmark | Grok 4.1 | Mercury 2 |
|---|---|---|
| LMArena Hard Prompts | 1435 | 1362 |
| CritPt | — | 0.8% |
Math Not comparable
Grok 4.1: 38.9 (#120), Mercury 2: —
| Benchmark | Grok 4.1 | Mercury 2 |
|---|---|---|
| LMArena Math | 1422 | — |
Knowledge Grok 4.1 leads
Grok 4.1: 39.5 (#133), Mercury 2: 36.2 (#172)
| Benchmark | Grok 4.1 | Mercury 2 |
|---|---|---|
| LMArena Expert | 1417 | 1358 |
| Vectara Hallucination Rate | — | 12.3% |
Multilingual Grok 4.1 leads
Grok 4.1: 53.4 (#68), Mercury 2: 46.6 (#157)
| Benchmark | Grok 4.1 | Mercury 2 |
|---|---|---|
| LMArena Non-English | 1425 | 1331 |
| LMArena Chinese | 1465 | 1417 |
| LMArena Russian | 1434 | 1304 |
| LMArena French | 1448 | — |
| LMArena German | 1446 | — |
| LMArena Japanese | 1397 | — |
| LMArena Korean | 1407 | — |
| LMArena Spanish | 1438 | — |
Instruction Following Grok 4.1 leads
Grok 4.1: 73.8 (#111), Mercury 2: 70.2 (#165)
| Benchmark | Grok 4.1 | Mercury 2 |
|---|---|---|
| LMArena Instruction Following | 1400 | 1329 |
Long Context Grok 4.1 leads
Grok 4.1: 43.2 (#100), Mercury 2: 40.5 (#154)
| Benchmark | Grok 4.1 | Mercury 2 |
|---|---|---|
| LMArena Longer Query | 1416 | 1330 |
Writing & Preference Grok 4.1 leads
Grok 4.1: 62.4 (#75), Mercury 2: 53.8 (#155)
| Benchmark | Grok 4.1 | Mercury 2 |
|---|---|---|
| LMArena Text | 1437 | 1355 |
| LMArena Creative Writing | 1411 | 1289 |
| LMArena Multi-Turn | 1437 | 1358 |
Frequently asked questions
Is Grok 4.1 better than Mercury 2?
Grok 4.1 is the stronger model overall, scoring 41.5 to 39.1 on the Noometry Index.
Is Grok 4.1 or Mercury 2 better for coding?
They score almost the same on coding (33.7 vs 33.5); test both on your own repository before choosing.
How many benchmarks do Grok 4.1 and Mercury 2 share?
12 benchmarks have published results for both models. Grok 4.1 has 19 scored results on Noometry and Mercury 2 has 17.