Model comparison
Claude Opus 5 vs Grok-3 mini
Claude Opus 5 is the stronger model overall, scoring 67.8 to 41.2 on the Noometry Index.
Last verified . 23 shared benchmarks.
Summary
- They share 23 benchmarks with published results for both. Claude Opus 5 scores higher in 8 categories and Grok-3 mini in 0 categories; 7 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Claude Opus 5 leads 77.2 to 13.6.
- The biggest single-benchmark swing is ARC-AGI-2: 90.4% for Claude Opus 5 and 0.4% for Grok-3 mini.
Side by side
| Claude Opus 5 | Grok-3 mini | |
|---|---|---|
| Provider | Anthropic | xAI |
| Noometry Index | 67.8 | 41.2 |
| Released | 2026-07-24 | 2025-04-09 |
| Weights | Proprietary | Proprietary |
| Context window | 1M | — |
| Max output | 128K | — |
| Input $ / M tokens | $5 | — |
| Output $ / M tokens | $25 | — |
| Results tracked | 57 | 35 |
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Category by category
Coding Claude Opus 5 leads
Claude Opus 5: 67.5 (#5), Grok-3 mini: 40.8 (#131)
| Benchmark | Claude Opus 5 | Grok-3 mini |
|---|---|---|
| WeirdML | 91.8% | 42.6% |
| LMArena Coding | 1534 | 1379 |
| DeepSWE | 73.6% | — |
| FrontierCode | 53.4% | — |
| Aider Polyglot | — | 49.3% |
| CursorBench | 46.6% | — |
| LMArena WebDev | 1691 | — |
| FrontierSWE | 52% | — |
| SciCode | 56.4% | — |
| ALE-Bench | 2,165 | — |
Agentic & Tool Use Not comparable
Claude Opus 5: 55.6 (#1), Grok-3 mini: —
| Benchmark | Claude Opus 5 | Grok-3 mini |
|---|---|---|
| APEX-Agents | 65.8% | — |
| OSWorld 2.0 | 31.4% | — |
| τ²-bench Banking | 48.7% | — |
| PostTrainBench | 35% | — |
| BALROG | 63.4% | — |
| GBAEval | 79.6% | — |
| GDP.pdf | 24% | — |
| Vending-Bench 2 | 11,182 | — |
Reasoning Claude Opus 5 leads
Claude Opus 5: 77.2 (#4), Grok-3 mini: 13.6 (#334)
| Benchmark | Claude Opus 5 | Grok-3 mini |
|---|---|---|
| ARC-AGI-2 | 90.4% | 0.4% |
| ARC-AGI-1 | 97.5% | 16.5% |
| LMArena Hard Prompts | 1526 | 1375 |
| Epoch Capabilities Index | 162.78 | 140.35 |
| SimpleBench | 80.6% | — |
| Kagi LLM Benchmark | — | 61.3% |
| NYT Connections (extended) | 94.3% | — |
| CritPt | 29.1% | — |
| Chess Puzzles | 42% | — |
| EBR-Bench | 45.7% | — |
| Mystery Game Puzzles | 59% | — |
| DTBench | 97.9% | — |
| LMCA | 64.5% | — |
| Bench to the Future 3 | 0.12 | — |
Math Claude Opus 5 leads
Claude Opus 5: 86.2 (#8), Grok-3 mini: 42.1 (#85)
| Benchmark | Claude Opus 5 | Grok-3 mini |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 98.9% | 77.8% |
| LMArena Math | 1531 | 1386 |
| FrontierMath (Tiers 1-3) | 85.6% | — |
| FrontierMath Tier 4 | 73.2% | — |
| ProofBench | 99% | — |
| Omni-MATH | — | 31.8% |
| MATH Level 5 | — | 90.9% |
| FrontierMath (Feb 2025 set) | — | 5.9% |
Knowledge Claude Opus 5 leads
Claude Opus 5: 66.8 (#9), Grok-3 mini: 46.4 (#81)
| Benchmark | Claude Opus 5 | Grok-3 mini |
|---|---|---|
| GPQA Diamond | 93.9% | 76.3% |
| LMArena Expert | 1557 | 1395 |
| SimpleQA Verified | 59.9% | — |
| MMLU-Pro | — | 79.9% |
| Confabulations | — | 10.8% |
| GPQA (HELM) | — | 67.5% |
Multimodal Not comparable
Claude Opus 5: 50.8 (#8), Grok-3 mini: —
| Benchmark | Claude Opus 5 | Grok-3 mini |
|---|---|---|
| LMArena Vision | 1319 | — |
| Blueprint-Bench 2 | 30.4% | — |
| Furniture Assembly | 60.8% | — |
| LMArena Document | 1516 | — |
Multilingual Claude Opus 5 leads
Claude Opus 5: 58.8 (#4), Grok-3 mini: 48.1 (#145)
| Benchmark | Claude Opus 5 | Grok-3 mini |
|---|---|---|
| LMArena Non-English | 1501 | 1352 |
| LMArena Chinese | 1574 | 1387 |
| LMArena French | 1519 | 1357 |
| LMArena German | 1524 | 1349 |
| LMArena Japanese | 1516 | 1342 |
| LMArena Korean | 1521 | 1335 |
| LMArena Russian | 1507 | 1353 |
| LMArena Spanish | 1519 | 1381 |
Instruction Following Too close to call
Claude Opus 5: 79.2 (#7), Grok-3 mini: 78.5 (#9)
| Benchmark | Claude Opus 5 | Grok-3 mini |
|---|---|---|
| LMArena Instruction Following | 1517 | 1357 |
| IFEval | — | 95.1% |
Long Context Claude Opus 5 leads
Claude Opus 5: 46.5 (#21), Grok-3 mini: 41.0 (#147)
| Benchmark | Claude Opus 5 | Grok-3 mini |
|---|---|---|
| LMArena Longer Query | 1515 | 1372 |
| Fiction.LiveBench | — | 66.7% |
Writing & Preference Claude Opus 5 leads
Claude Opus 5: 79.2 (#1), Grok-3 mini: 52.5 (#169)
| Benchmark | Claude Opus 5 | Grok-3 mini |
|---|---|---|
| LMArena Text | 1507 | 1370 |
| LMArena Creative Writing | 1491 | 1342 |
| LMArena Multi-Turn | 1499 | 1355 |
| Short-Story Creative Writing | — | 73.5% |
| EQ-Bench Creative Writing | 2133 | — |
| WildBench | — | 65.1% |
| EQ-Bench 4 | 1385 | — |
Frequently asked questions
Is Claude Opus 5 better than Grok-3 mini?
Claude Opus 5 is the stronger model overall, scoring 67.8 to 41.2 on the Noometry Index.
Is Claude Opus 5 or Grok-3 mini better for coding?
Claude Opus 5 scores higher on coding benchmarks: 67.5 versus 40.8 in the Noometry coding category.
How many benchmarks do Claude Opus 5 and Grok-3 mini share?
23 benchmarks have published results for both models. Claude Opus 5 has 57 scored results on Noometry and Grok-3 mini has 35.