Model comparison
Claude Opus 4 vs Grok 4.6
Grok 4.6 is the stronger model overall, scoring 56.9 to 43.1 on the Noometry Index.
Last verified . 28 shared benchmarks.
Summary
- They share 28 benchmarks with published results for both. Claude Opus 4 scores higher in 1 category and Grok 4.6 in 9 categories; 10 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Grok 4.6 leads 61.4 to 27.3.
- The biggest single-benchmark swing is ARC-AGI-2: 8.6% for Claude Opus 4 and 67.1% for Grok 4.6.
- Grok 4.6 is cheaper at $2 / $6 per million input/output tokens, against $15 / $75 for Claude Opus 4.
- Grok 4.6 accepts more context: 500K tokens versus 200K.
Side by side
| Claude Opus 4 | Grok 4.6 | |
|---|---|---|
| Provider | Anthropic | xAI |
| Noometry Index | 43.1 | 56.9 |
| Released | 2025-05-22 | 2026-08-12 |
| Weights | Proprietary | Proprietary |
| Context window | 200K | 500K |
| Max output | 32K | 500K |
| Input $ / M tokens | $15 | $2 |
| Output $ / M tokens | $75 | $6 |
| Results tracked | 56 | 49 |
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Category by category
Coding Grok 4.6 leads
Claude Opus 4: 47.2 (#62), Grok 4.6: 58.5 (#16)
| Benchmark | Claude Opus 4 | Grok 4.6 |
|---|---|---|
| WeirdML | 43.7% | 67.3% |
| LMArena Coding | 1442 | 1465 |
| SWE-bench Verified | 70.7% | — |
| DeepSWE | — | 67.5% |
| FrontierCode | — | 48% |
| SWE-bench Verified (bash only) | 67.6% | — |
| Aider Polyglot | 72% | — |
| CursorBench | — | 41.4% |
| LMArena WebDev | — | 1617 |
| FrontierSWE | — | 25.3% |
| SciCode | — | 56.5% |
| GSO | 6.9% | — |
| ALE-Bench | — | 1,508 |
| AlgoTune | 1.33 | — |
Agentic & Tool Use Grok 4.6 leads
Claude Opus 4: 34.8 (#42), Grok 4.6: 39.4 (#27)
| Benchmark | Claude Opus 4 | Grok 4.6 |
|---|---|---|
| APEX-Agents | — | 65.3% |
| Cybench | 38% | — |
| DeepResearch Bench | 46.8% | — |
| GDP.pdf | — | 17.2% |
| LMArena Search | 1127 | — |
| METR Time Horizons | 63.9% | — |
| Vending-Bench 2 | — | 9,047 |
Reasoning Grok 4.6 leads
Claude Opus 4: 27.3 (#121), Grok 4.6: 61.4 (#20)
| Benchmark | Claude Opus 4 | Grok 4.6 |
|---|---|---|
| ARC-AGI-2 | 8.6% | 67.1% |
| SimpleBench | 58.8% | 75.9% |
| ARC-AGI-1 | 35.7% | 87.5% |
| CritPt | 0.3% | 19.7% |
| LMArena Hard Prompts | 1399 | 1447 |
| DTBench | 81.6% | 97.3% |
| LMCA | 37.4% | 48.5% |
| Epoch Capabilities Index | 142.67 | 156.44 |
| Kagi LLM Benchmark | 74.3% | — |
| NYT Connections (extended) | — | 80% |
| Chess Puzzles | — | 40% |
| EnigmaEval | 5.6% | — |
| EBR-Bench | — | 30.5% |
| Mystery Game Puzzles | — | 34% |
| ForecastBench | 61.1 | — |
Math Grok 4.6 leads
Claude Opus 4: 42.0 (#86), Grok 4.6: 67.0 (#24)
| Benchmark | Claude Opus 4 | Grok 4.6 |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 64.4% | 99.2% |
| LMArena Math | 1390 | 1423 |
| FrontierMath (Tiers 1-3) | — | 66% |
| FrontierMath Tier 4 | — | 31.7% |
| ProofBench | — | 51% |
| Omni-MATH | 61.6% | — |
| MATH Level 5 | 85% | — |
| FrontierMath (Feb 2025 set) | 4.5% | — |
| FrontierMath Tier 4 (v1) | 4.2% | — |
Knowledge Grok 4.6 leads
Claude Opus 4: 44.0 (#88), Grok 4.6: 63.3 (#20)
| Benchmark | Claude Opus 4 | Grok 4.6 |
|---|---|---|
| GPQA Diamond | 76.3% | 94% |
| LMArena Expert | 1386 | 1467 |
| Humanity's Last Exam | 10.7% | — |
| SimpleQA Verified | — | 49.3% |
| MMLU-Pro | 87.5% | — |
| Confabulations | 15.9% | — |
| Vectara Hallucination Rate | 12% | — |
| GPQA (HELM) | 70.8% | — |
Multimodal Grok 4.6 leads
Claude Opus 4: 31.5 (#106), Grok 4.6: 43.6 (#23)
| Benchmark | Claude Opus 4 | Grok 4.6 |
|---|---|---|
| LMArena Vision | 1192 | 1263 |
| GeoBench | 49% | — |
| VPCT | 38% | — |
| Blueprint-Bench 2 | — | 33.2% |
| Furniture Assembly | — | 40% |
| LMArena Document | — | 1452 |
Multilingual Grok 4.6 leads
Claude Opus 4: 48.8 (#138), Grok 4.6: 53.0 (#74)
| Benchmark | Claude Opus 4 | Grok 4.6 |
|---|---|---|
| LMArena Non-English | 1362 | 1420 |
| LMArena Chinese | 1386 | 1480 |
| LMArena French | 1372 | 1461 |
| LMArena German | 1391 | 1431 |
| LMArena Japanese | 1331 | 1376 |
| LMArena Korean | 1321 | 1397 |
| LMArena Russian | 1392 | 1422 |
| LMArena Spanish | 1389 | 1404 |
Instruction Following Claude Opus 4 leads
Claude Opus 4: 77.1 (#28), Grok 4.6: 75.4 (#63)
| Benchmark | Claude Opus 4 | Grok 4.6 |
|---|---|---|
| LMArena Instruction Following | 1406 | 1431 |
| IFEval | 91.8% | — |
Long Context Grok 4.6 leads
Claude Opus 4: 39.6 (#172), Grok 4.6: 44.5 (#66)
| Benchmark | Claude Opus 4 | Grok 4.6 |
|---|---|---|
| LMArena Longer Query | 1422 | 1454 |
| Fiction.LiveBench | 61.1% | — |
Writing & Preference Grok 4.6 leads
Claude Opus 4: 61.2 (#89), Grok 4.6: 62.3 (#80)
| Benchmark | Claude Opus 4 | Grok 4.6 |
|---|---|---|
| LMArena Text | 1377 | 1428 |
| LMArena Creative Writing | 1387 | 1428 |
| LMArena Multi-Turn | 1396 | 1425 |
| Short-Story Creative Writing | 83.6% | — |
| EQ-Bench Creative Writing | 1580 | — |
| WildBench | 85.2% | — |
Frequently asked questions
Is Claude Opus 4 better than Grok 4.6?
Grok 4.6 is the stronger model overall, scoring 56.9 to 43.1 on the Noometry Index.
Which is cheaper, Claude Opus 4 or Grok 4.6?
Grok 4.6 is cheaper. It lists at $2 per million input tokens and $6 per million output tokens; Claude Opus 4 lists at $15 and $75.
Is Claude Opus 4 or Grok 4.6 better for coding?
Grok 4.6 scores higher on coding benchmarks: 58.5 versus 47.2 in the Noometry coding category.
Which has the bigger context window?
Grok 4.6 does, with 500K tokens against 200K.
How many benchmarks do Claude Opus 4 and Grok 4.6 share?
28 benchmarks have published results for both models. Claude Opus 4 has 56 scored results on Noometry and Grok 4.6 has 49.