Model comparison
GPT-6 Luna vs Grok 4.1
GPT-6 Luna is the stronger model overall, scoring 53.3 to 41.5 on the Noometry Index.
Last verified . 18 shared benchmarks.
Summary
- They share 18 benchmarks with published results for both. GPT-6 Luna scores higher in 5 categories and Grok 4.1 in 4 categories; 6 gaps are clear of the uncertainty.
- The widest gap is in math, where GPT-6 Luna leads 76.1 to 38.9.
Side by side
| GPT-6 Luna | Grok 4.1 | |
|---|---|---|
| Provider | OpenAI | xAI |
| Noometry Index | 53.3 | 41.5 |
| Released | 2026-09-22 | 2025-11-17 |
| Weights | Proprietary | Proprietary |
| Context window | 1.05M | — |
| Max output | 128K | — |
| Input $ / M tokens | $0.10 | — |
| Output $ / M tokens | $0.50 | — |
| Results tracked | 42 | 19 |
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Category by category
Coding GPT-6 Luna leads
GPT-6 Luna: 55.5 (#25), Grok 4.1: 33.7 (#253)
| Benchmark | GPT-6 Luna | Grok 4.1 |
|---|---|---|
| LMArena WebDev | 1581 | 1214 |
| LMArena Coding | 1439 | 1445 |
| DeepSWE | 66.6% | — |
| FrontierCode | 42.4% | — |
| SciCode | 54.6% | — |
| ALE-Bench | 1,577 | — |
Agentic & Tool Use Too close to call
GPT-6 Luna: 33.3 (#54), Grok 4.1: 34.1 (#49)
| Benchmark | GPT-6 Luna | Grok 4.1 |
|---|---|---|
| APEX-Agents | 44.3% | — |
| Cybench | — | 39% |
| GDP.pdf | 23% | — |
Reasoning GPT-6 Luna leads
GPT-6 Luna: 48.2 (#41), Grok 4.1: 29.5 (#91)
| Benchmark | GPT-6 Luna | Grok 4.1 |
|---|---|---|
| LMArena Hard Prompts | 1411 | 1435 |
| ARC-AGI-2 | 59.3% | — |
| NYT Connections (extended) | 68.7% | — |
| ARC-AGI-1 | 86.7% | — |
| CritPt | 19.4% | — |
| Chess Puzzles | 31% | — |
| Mystery Game Puzzles | 7% | — |
| DTBench | 90.1% | — |
| LMCA | 44.5% | — |
| Epoch Capabilities Index | 156.28 | — |
Math GPT-6 Luna leads
GPT-6 Luna: 76.1 (#15), Grok 4.1: 38.9 (#120)
| Benchmark | GPT-6 Luna | Grok 4.1 |
|---|---|---|
| LMArena Math | 1416 | 1422 |
| FrontierMath (Tiers 1-3) | 78.9% | — |
| FrontierMath Tier 4 | 56.1% | — |
| OTIS Mock AIME 2024-2025 | 98.9% | — |
| ProofBench | 64% | — |
Knowledge GPT-6 Luna leads
GPT-6 Luna: 57.0 (#41), Grok 4.1: 39.5 (#133)
| Benchmark | GPT-6 Luna | Grok 4.1 |
|---|---|---|
| LMArena Expert | 1444 | 1417 |
| GPQA Diamond | 90.5% | — |
| SimpleQA Verified | 41.4% | — |
Multimodal Not comparable
GPT-6 Luna: 42.4 (#30), Grok 4.1: —
| Benchmark | GPT-6 Luna | Grok 4.1 |
|---|---|---|
| LMArena Vision | 1217 | — |
| Blueprint-Bench 2 | 31.2% | — |
| Furniture Assembly | 44.2% | — |
Multilingual Grok 4.1 leads
GPT-6 Luna: 50.5 (#117), Grok 4.1: 53.4 (#68)
| Benchmark | GPT-6 Luna | Grok 4.1 |
|---|---|---|
| LMArena Non-English | 1386 | 1425 |
| LMArena Chinese | 1433 | 1465 |
| LMArena French | 1420 | 1448 |
| LMArena German | 1369 | 1446 |
| LMArena Japanese | 1369 | 1397 |
| LMArena Korean | 1360 | 1407 |
| LMArena Russian | 1394 | 1434 |
| LMArena Spanish | 1393 | 1438 |
Instruction Following Too close to call
GPT-6 Luna: 74.3 (#99), Grok 4.1: 73.8 (#111)
| Benchmark | GPT-6 Luna | Grok 4.1 |
|---|---|---|
| LMArena Instruction Following | 1409 | 1400 |
Long Context Too close to call
GPT-6 Luna: 43.0 (#111), Grok 4.1: 43.2 (#100)
| Benchmark | GPT-6 Luna | Grok 4.1 |
|---|---|---|
| LMArena Longer Query | 1409 | 1416 |
Writing & Preference Grok 4.1 leads
GPT-6 Luna: 58.3 (#119), Grok 4.1: 62.4 (#75)
| Benchmark | GPT-6 Luna | Grok 4.1 |
|---|---|---|
| LMArena Text | 1391 | 1437 |
| LMArena Creative Writing | 1363 | 1411 |
| LMArena Multi-Turn | 1396 | 1437 |
Frequently asked questions
Is GPT-6 Luna better than Grok 4.1?
GPT-6 Luna is the stronger model overall, scoring 53.3 to 41.5 on the Noometry Index.
Is GPT-6 Luna or Grok 4.1 better for coding?
GPT-6 Luna scores higher on coding benchmarks: 55.5 versus 33.7 in the Noometry coding category.
How many benchmarks do GPT-6 Luna and Grok 4.1 share?
18 benchmarks have published results for both models. GPT-6 Luna has 42 scored results on Noometry and Grok 4.1 has 19.