Claude Opus 5 vs Grok 4.1
Claude Opus 5 
Grok 4.1 Verdict
- Claude Opus 5 leads on quality: 68.4 vs 57.4.
- Claude Opus 5 is stronger in coding, composite, human preference, knowledge, long context, maths, multimodal, reasoning.
- Grok 4.1 (thinking) is stronger in agents & tools.
- Grok 4.1 (thinking) is 6.4× cheaper ($1.56 vs $10.00 per 1M blended).
| Metric | Claude Opus 5 | Grok 4.1 (thinking) |
|---|---|---|
| BenchLeader Index | 68.4 | 57.4 |
| Agents & tools score | 71.5 | 78.3 |
| Coding score | 68.6 | 47.5 |
| Composite score | 85.3 | – |
| Human preference score | 78.2 | 66.4 |
| Knowledge score | 69.7 | 57.2 |
| Long context score | 63.7 | – |
| Maths score | 67.1 | 48.3 |
| Multimodal score | 68.9 | 53.2 |
| Reasoning score | 71.5 | 58.9 |
| Blended price $/M | $10.00 | $1.56 |
| Output speed | 53 tok/s | – |
| Time to first answer | 53.0 s | – |
| Context window | 1M | 2M |
| GPQA Diamond | 92.9% | – |
| OTIS Mock AIME | 97.8% | – |
| SimpleBench | 80.6% | 56.0% |
| WeirdML | 86.3% | – |
| ProofBench | – | 4.0% |
| Epoch Capabilities Index | 162.6 | – |
| LMArena Text | – | 1465 |
| LMArena Hard Prompts | – | 1477 |
| LMArena Coding | – | 1499 |
| LMArena WebDev | – | 1240 |
| LMArena Vision | – | 1199 |
| AA Intelligence Index | 50.7 | – |
| AA-LCR | 79.3% | – |
| MMMU-Pro | 84.7% | – |
| AA-Omniscience | 37.1 | – |
| GPQA Diamond (AA) | 93.2% | – |
| Humanity's Last Exam (AA) | 54.9% | – |
| SciCode (AA) | 56.4% | – |
| AIME (Vals) | – | 91.9% |
| LiveCodeBench | 89.0% | 80.6% |
| MMLU-Pro | 91.6% | 84.2% |
| IOI | 84.3% | – |
| LegalBench | 87.0% | 82.5% |
| CorpFin | 73.2% | 66.0% |
| TaxEval | 75.1% | 73.1% |
| MedQA | – | 92.1% |
| MGSM | – | 89.5% |
| Terminal-Bench 2.1 (Vals) | 84.6% | – |
| SWE-bench (Vals) | 97.0% | 41.4% |
| GPQA Diamond (Vals) | 93.4% | 84.3% |
| Vals Index | 67.2 | – |
| AIME 2026 | – | 94.2% |
| HMMT February 2026 | – | 86.4% |
| MathArena Apex | – | 5.2% |
| HiL-Bench | 57.0% | – |
| EQ-Bench 4 | 1385 | – |
| BFCL Overall | – | 69.6% |
Data as of 2026-09-13. Best configuration of each model; every score links to its source on the model pages.
Claude Opus 5 vs Grok 4.1: questions
- Is Claude Opus 5 better than Grok 4.1?
- Claude Opus 5 leads on quality: 68.4 vs 57.4. The BenchLeader Index combines every independent quality benchmark; Claude Opus 5 is ahead overall as of 2026-09-13, but check the category scores for your use.
- Is Claude Opus 5 better than Grok 4.1 for coding?
- Claude Opus 5 scores higher in coding (69 vs 48 on the category index, where 50 is average).
- Is Claude Opus 5 better than Grok 4.1 for agentic tasks?
- Grok 4.1 scores higher in agentic tasks (78 vs 72 on the category index, where 50 is average).
- Which is cheaper, Claude Opus 5 or Grok 4.1?
- Grok 4.1 is cheaper: $1.56 against $10.00 per million tokens, blended at three input tokens per output token.
- Which has the larger context window?
- Grok 4.1 accepts more context: 2M against 1M tokens.