Model comparison
Claude Opus 4.5 vs Grok-3 mini
Claude Opus 4.5 is the stronger model overall, scoring 50.5 to 41.0 on the Noometry Index.
Last verified . 25 shared benchmarks.
Summary
- They share 25 benchmarks with published results for both. Claude Opus 4.5 scores higher in 6 categories and Grok-3 mini in 2 categories; 7 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Claude Opus 4.5 leads 42.5 to 13.8.
- The biggest single-benchmark swing is ARC-AGI-1: 80% for Claude Opus 4.5 and 16.5% for Grok-3 mini.
Side by side
| Claude Opus 4.5 | Grok-3 mini | |
|---|---|---|
| Provider | Anthropic | xAI |
| Noometry Index | 50.5 | 41.0 |
| Released | 2025-11-01 | 2025-04-09 |
| Weights | Proprietary | Proprietary |
| Context window | 200K | — |
| Max output | 64K | — |
| Input $ / M tokens | $5 | — |
| Output $ / M tokens | $25 | — |
| Results tracked | 69 | 35 |
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Category by category
Coding Claude Opus 4.5 leads
Claude Opus 4.5: 55.4 (#21), Grok-3 mini: 40.4 (#126)
| Benchmark | Claude Opus 4.5 | Grok-3 mini |
|---|---|---|
| WeirdML | 63.7% | 42.6% |
| LMArena Coding | 1504 | 1380 |
| SWE-bench Verified | 76.7% | — |
| SWE-bench Verified (bash only) | 76.8% | — |
| Aider Polyglot | — | 49.3% |
| LMArena WebDev | 1493 | — |
| SWE-bench Multilingual | 70.7% | — |
| GSO | 26.5% | — |
| ALE-Bench | 1,025 | — |
| AlgoTune | 1.77 | — |
Agentic & Tool Use Not comparable
Claude Opus 4.5: 47.2 (#11), Grok-3 mini: —
| Benchmark | Claude Opus 4.5 | Grok-3 mini |
|---|---|---|
| Terminal-Bench | 63.1% | — |
| Berkeley Function Calling Leaderboard | 77.5% | — |
| GDPval | 45.5% | — |
| Remote Labor Index | 3.8% | — |
| τ²-bench Airline | 84% | — |
| τ²-bench Banking | 24.7% | — |
| τ²-bench Retail | 79.6% | — |
| τ²-bench Telecom | 92.3% | — |
| Cybench | 82% | — |
| DeepResearch Bench | 54.8% | — |
| OSWorld | 66.3% | — |
| BALROG | 43.5% | — |
| LMArena Search | 1180 | — |
| METR Time Horizons | 75% | — |
| Vending-Bench 2 | 4,967 | — |
Reasoning Claude Opus 4.5 leads
Claude Opus 4.5: 42.5 (#43), Grok-3 mini: 13.8 (#323)
| Benchmark | Claude Opus 4.5 | Grok-3 mini |
|---|---|---|
| ARC-AGI-2 | 37.6% | 0.4% |
| Kagi LLM Benchmark | 80.2% | 61.3% |
| ARC-AGI-1 | 80% | 16.5% |
| LMArena Hard Prompts | 1476 | 1374 |
| Epoch Capabilities Index | 150.1 | 140.35 |
| SimpleBench | 62% | — |
| NYT Connections (extended) | 52.5% | — |
| Chess Puzzles | 12% | — |
| EnigmaEval | 11.9% | — |
| EBR-Bench | 14.3% | — |
| Mystery Game Puzzles | 22% | — |
| DTBench | 89.9% | — |
| LMCA | 44.5% | — |
| ForecastBench | 60.7 | — |
Math Grok-3 mini leads
Claude Opus 4.5: 38.5 (#85), Grok-3 mini: 40.3 (#78)
| Benchmark | Claude Opus 4.5 | Grok-3 mini |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 86.1% | 77.8% |
| LMArena Math | 1463 | 1386 |
| FrontierMath (Feb 2025 set) | 20.7% | 5.9% |
| FrontierMath (Tiers 1-3) | 34.4% | — |
| FrontierMath Tier 4 | 4.9% | — |
| ProofBench | 36% | — |
| Omni-MATH | — | 31.8% |
| MATH Level 5 | — | 90.9% |
| FrontierMath Tier 4 (v1) | 4.2% | — |
Knowledge Claude Opus 4.5 leads
Claude Opus 4.5: 56.4 (#38), Grok-3 mini: 46.3 (#75)
| Benchmark | Claude Opus 4.5 | Grok-3 mini |
|---|---|---|
| GPQA Diamond | 86% | 76.3% |
| LMArena Expert | 1488 | 1395 |
| Humanity's Last Exam | 25.2% | — |
| SimpleQA Verified | 45.7% | — |
| MMLU-Pro | — | 79.9% |
| Confabulations | — | 10.8% |
| Vectara Hallucination Rate | 10.9% | — |
| GPQA (HELM) | — | 67.5% |
Multimodal Not comparable
Claude Opus 4.5: 31.1 (#99), Grok-3 mini: —
| Benchmark | Claude Opus 4.5 | Grok-3 mini |
|---|---|---|
| GeoBench | 75% | — |
| VPCT | 40% | — |
| Furniture Assembly | 28.3% | — |
| LMArena Document | 1462 | — |
Multilingual Claude Opus 4.5 leads
Claude Opus 4.5: 54.5 (#45), Grok-3 mini: 48.3 (#141)
| Benchmark | Claude Opus 4.5 | Grok-3 mini |
|---|---|---|
| LMArena Non-English | 1438 | 1352 |
| LMArena Chinese | 1470 | 1387 |
| LMArena French | 1471 | 1357 |
| LMArena German | 1449 | 1350 |
| LMArena Japanese | 1415 | 1343 |
| LMArena Korean | 1424 | 1336 |
| LMArena Russian | 1448 | 1352 |
| LMArena Spanish | 1455 | 1379 |
Instruction Following Too close to call
Claude Opus 4.5: 77.7 (#20), Grok-3 mini: 78.7 (#8)
| Benchmark | Claude Opus 4.5 | Grok-3 mini |
|---|---|---|
| LMArena Instruction Following | 1478 | 1356 |
| IFEval | — | 95.1% |
Long Context Claude Opus 4.5 leads
Claude Opus 4.5: 46.4 (#21), Grok-3 mini: 41.0 (#142)
| Benchmark | Claude Opus 4.5 | Grok-3 mini |
|---|---|---|
| LMArena Longer Query | 1480 | 1372 |
| Fiction.LiveBench | — | 66.7% |
| CL-bench | 21.1% | — |
Writing & Preference Claude Opus 4.5 leads
Claude Opus 4.5: 68.2 (#28), Grok-3 mini: 52.7 (#163)
| Benchmark | Claude Opus 4.5 | Grok-3 mini |
|---|---|---|
| LMArena Text | 1451 | 1370 |
| LMArena Creative Writing | 1445 | 1342 |
| LMArena Multi-Turn | 1466 | 1355 |
| Short-Story Creative Writing | — | 73.5% |
| EQ-Bench Creative Writing | 1687 | — |
| WildBench | — | 65.1% |
Frequently asked questions
Is Claude Opus 4.5 better than Grok-3 mini?
Claude Opus 4.5 is the stronger model overall, scoring 50.5 to 41.0 on the Noometry Index.
Is Claude Opus 4.5 or Grok-3 mini better for coding?
Claude Opus 4.5 scores higher on coding benchmarks: 55.4 versus 40.4 in the Noometry coding category.
How many benchmarks do Claude Opus 4.5 and Grok-3 mini share?
25 benchmarks have published results for both models. Claude Opus 4.5 has 69 scored results on Noometry and Grok-3 mini has 35.