Claude Opus 5.5 vs Grok 4.7
Claude Opus 5.5 
Grok 4.7 Verdict
- Claude Opus 5.5 (thinking) leads on quality: 70.7 vs 61.9.
- Claude Opus 5.5 (thinking) is stronger in composite, knowledge, long context, multimodal, reasoning.
- Grok 4.7 (xhigh) is stronger in agents & tools, coding.
- Grok 4.7 (xhigh) is 2.7× cheaper ($3.00 vs $8.00 per 1M blended).
| Metric | Claude Opus 5.5 (thinking) | Grok 4.7 (xhigh) |
|---|---|---|
| BenchLeader Index | 70.7 | 61.9 |
| Composite score | 95.0 | 72.1 |
| Knowledge score | 85.0 | 71.9 |
| Long context score | 68.5 | 64.4 |
| Multimodal score | 71.9 | – |
| Reasoning score | 95.0 | 74.2 |
| Agents & tools score | – | 50.8 |
| Coding score | – | 59.6 |
| Blended price $/M | $8.00 | $3.00 |
| Output speed | 48 tok/s | 39 tok/s |
| Time to first answer | 4.2 s | 0.8 s |
| Context window | 1M | 500k |
| Terminal-Bench | – | 37.6% |
| SciCode | – | 57.4% |
| LiveBench | – | 77.4% |
| LiveBench Reasoning | – | 82.7% |
| LiveBench Coding | – | 77.2% |
| LiveBench Agentic Coding | – | 54.0% |
| LiveBench Mathematics | – | 95.7% |
| LiveBench Data Analysis | – | 76.9% |
| LiveBench Language | – | 80.1% |
| LiveBench Instruction Following | – | 75.3% |
| AA Intelligence Index | 57.6 | 46.5 |
| AA-LCR | 84.7% | 76.7% |
| MMMU-Pro | 87.7% | – |
| AA-Omniscience | 46.4 | 32.0 |
| Humanity's Last Exam (AA) | 61.4% | 43.1% |
| SciCode (AA) | 66.9% | 57.4% |
| IOI | – | 57.7% |
| LegalBench | – | 84.4% |
| Terminal-Bench 2.1 (Vals) | – | 73.4% |
| Vals Index | – | 60.2 |
| CritPt | 31.7% | 17.7% |
| GDPval (AA) | 67.3% | 59.8% |
| Code Migration | – | 44.8% |
| Excel Modeling Benchmark | – | 67.0% |
| Finance Agent v2 | – | 52.3% |
| Harvey's Legal Agent Benchmark | – | 12.1% |
| Legal Research Bench | – | 47.1% |
| MedCode | – | 49.5% |
| MedScribe | – | 89.4% |
| MysteryMechanism | – | 25.2% |
| Public Benefits Bench | – | 65.6% |
| SAGE | – | 40.8% |
| Tax Agent Bench | – | 65.6% |
| Vibe Code Bench v1.1 | – | 86.2% |
| CursorBench | – | 46.3% |
| Terminal-Bench 4.0 (AA) | 59.6% | 25.8% |
| AutomationBench | 69.5% | 65.6% |
| GDP.pdf | 26.2% | 20.0% |
| MLCR | – | 15.0% |
| Harvey LAB | 91.2% | – |
| AA-Omniscience: accuracy | 66.2% | 47.5% |
| AA-Omniscience: non-hallucination | 41.4% | 70.7% |
| AA-Briefcase | 1822 | 1657 |
Data as of 2026-09-22. Best configuration of each model; every score links to its source on the model pages.
Claude Opus 5.5 vs Grok 4.7: questions
- Is Claude Opus 5.5 better than Grok 4.7?
- Claude Opus 5.5 (thinking) leads on quality: 70.7 vs 61.9. The BenchLeader Index combines every independent quality benchmark; Claude Opus 5.5 (thinking) is ahead overall as of 2026-09-22, but check the category scores for your use.
- Which is cheaper, Claude Opus 5.5 or Grok 4.7?
- Grok 4.7 is cheaper: $3.00 against $8.00 per million tokens, blended at three input tokens per output token.
- Which is faster, Claude Opus 5.5 or Grok 4.7?
- Claude Opus 5.5 streams faster: 48 against 39 output tokens per second.
- Which has the larger context window?
- Claude Opus 5.5 accepts more context: 1M against 500k tokens.