GPT-5.5 Pro vs Grok 4.7
GPT-5.5 Pro 
Grok 4.7 Verdict
- GPT-5.5 Pro (xhigh) leads on quality: 67.0 vs 65.8.
- GPT-5.5 Pro (xhigh) is stronger in maths, reasoning.
- Grok 4.7 (high) is stronger in composite, knowledge, long context.
- Grok 4.7 (high) is 23× cheaper ($3.00 vs $67.50 per 1M blended).
- Grok 4.7 (high) streams 13.8× faster (55 vs 4 tokens per second).
| Metric | GPT-5.5 Pro (xhigh) | Grok 4.7 (high) |
|---|---|---|
| BenchLeader Index | 67.0 | 65.8 |
| Maths score | 74.4 | – |
| Reasoning score | 80.1 | 76.4 |
| Composite score | – | 87.5 |
| Knowledge score | – | 72.6 |
| Long context score | – | 64.8 |
| Blended price $/M | $67.50 | $3.00 |
| Output speed | 4 tok/s | 55 tok/s |
| Time to first answer | 3.5 s | 1.4 s |
| Context window | 1.1M | 500k |
| FrontierMath Tiers 1–3 | 87.7% | – |
| FrontierMath Tier 4 | 78.0% | – |
| AA Intelligence Index | – | 46.3 |
| AA-LCR | – | 77.0% |
| AA-Omniscience | – | 30.9 |
| Humanity's Last Exam (AA) | – | 42.3% |
| SciCode (AA) | – | 57.8% |
| LegalBench | – | 85.1% |
| ARC-AGI-1 | 95.0% | – |
| ARC-AGI-2 | 84.2% | – |
| CritPt | 30.6% | 18.0% |
| GDPval (AA) | – | 59.7% |
| Code Migration | – | 34.7% |
| Excel Modeling Benchmark | – | 54.9% |
| Harvey's Legal Agent Benchmark | – | 19.6% |
| Legal Research Bench | – | 39.9% |
| MedCode | – | 48.7% |
| MedScribe | – | 87.2% |
| ProgramBench | – | 0.0% |
| Public Benefits Bench | – | 68.5% |
| SAGE | – | 31.0% |
| LMCA | 53.9% | – |
| DTBench | 96.0% | – |
Data as of 2026-09-21. Best configuration of each model; every score links to its source on the model pages.
GPT-5.5 Pro vs Grok 4.7: questions
- Is GPT-5.5 Pro better than Grok 4.7?
- GPT-5.5 Pro (xhigh) leads on quality: 67.0 vs 65.8. The BenchLeader Index combines every independent quality benchmark; GPT-5.5 Pro (xhigh) is ahead overall as of 2026-09-21, but check the category scores for your use.
- Which is cheaper, GPT-5.5 Pro or Grok 4.7?
- Grok 4.7 is cheaper: $3.00 against $67.50 per million tokens, blended at three input tokens per output token.
- Which is faster, GPT-5.5 Pro or Grok 4.7?
- Grok 4.7 streams faster: 55 against 4 output tokens per second.
- Which has the larger context window?
- GPT-5.5 Pro accepts more context: 1.1M against 500k tokens.