Model comparison
GPT-5.5 Pro vs Grok 4.1
GPT-5.5 Pro is the stronger model overall, scoring 64.3 to 41.5 on the Noometry Index.
Last verified . 0 shared benchmarks.
Summary
- The widest gap is in math, where GPT-5.5 Pro leads 84.0 to 38.9.
Side by side
| GPT-5.5 Pro | Grok 4.1 | |
|---|---|---|
| Provider | OpenAI | xAI |
| Noometry Index | 64.3 | 41.5 |
| Released | 2026-04-23 | 2025-11-17 |
| Weights | Proprietary | Proprietary |
| Context window | 1.05M | — |
| Max output | 128K | — |
| Input $ / M tokens | $30 | — |
| Output $ / M tokens | $180 | — |
| Results tracked | 14 | 19 |
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Category by category
Coding Not comparable
GPT-5.5 Pro: —, Grok 4.1: 33.7 (#253)
| Benchmark | GPT-5.5 Pro | Grok 4.1 |
|---|---|---|
| LMArena WebDev | — | 1214 |
| LMArena Coding | — | 1445 |
Agentic & Tool Use Not comparable
GPT-5.5 Pro: —, Grok 4.1: 34.1 (#49)
| Benchmark | GPT-5.5 Pro | Grok 4.1 |
|---|---|---|
| Cybench | — | 39% |
Reasoning GPT-5.5 Pro leads
GPT-5.5 Pro: 73.3 (#10), Grok 4.1: 29.5 (#91)
| Benchmark | GPT-5.5 Pro | Grok 4.1 |
|---|---|---|
| ARC-AGI-2 | 84.6% | — |
| SimpleBench | 76.9% | — |
| ARC-AGI-1 | 96.5% | — |
| CritPt | 30.6% | — |
| Chess Puzzles | 64% | — |
| LMArena Hard Prompts | — | 1435 |
| DTBench | 96% | — |
| LMCA | 53.9% | — |
| Epoch Capabilities Index | 162.07 | — |
Math GPT-5.5 Pro leads
GPT-5.5 Pro: 84.0 (#10), Grok 4.1: 38.9 (#120)
| Benchmark | GPT-5.5 Pro | Grok 4.1 |
|---|---|---|
| FrontierMath (Tiers 1-3) | 87.7% | — |
| FrontierMath Tier 4 | 78% | — |
| OTIS Mock AIME 2024-2025 | 100% | — |
| LMArena Math | — | 1422 |
| FrontierMath (Feb 2025 set) | 52.4% | — |
| FrontierMath Tier 4 (v1) | 39.6% | — |
Knowledge GPT-5.5 Pro leads
GPT-5.5 Pro: 64.1 (#19), Grok 4.1: 39.5 (#133)
| Benchmark | GPT-5.5 Pro | Grok 4.1 |
|---|---|---|
| GPQA Diamond | 93.9% | — |
| LMArena Expert | — | 1417 |
Multilingual Not comparable
GPT-5.5 Pro: —, Grok 4.1: 53.4 (#68)
| Benchmark | GPT-5.5 Pro | Grok 4.1 |
|---|---|---|
| LMArena Non-English | — | 1425 |
| LMArena Chinese | — | 1465 |
| LMArena French | — | 1448 |
| LMArena German | — | 1446 |
| LMArena Japanese | — | 1397 |
| LMArena Korean | — | 1407 |
| LMArena Russian | — | 1434 |
| LMArena Spanish | — | 1438 |
Instruction Following Not comparable
GPT-5.5 Pro: —, Grok 4.1: 73.8 (#111)
| Benchmark | GPT-5.5 Pro | Grok 4.1 |
|---|---|---|
| LMArena Instruction Following | — | 1400 |
Long Context Not comparable
GPT-5.5 Pro: —, Grok 4.1: 43.2 (#100)
| Benchmark | GPT-5.5 Pro | Grok 4.1 |
|---|---|---|
| LMArena Longer Query | — | 1416 |
Writing & Preference Not comparable
GPT-5.5 Pro: —, Grok 4.1: 62.4 (#75)
| Benchmark | GPT-5.5 Pro | Grok 4.1 |
|---|---|---|
| LMArena Text | — | 1437 |
| LMArena Creative Writing | — | 1411 |
| LMArena Multi-Turn | — | 1437 |
Frequently asked questions
Is GPT-5.5 Pro better than Grok 4.1?
GPT-5.5 Pro is the stronger model overall, scoring 64.3 to 41.5 on the Noometry Index.
How many benchmarks do GPT-5.5 Pro and Grok 4.1 share?
0 benchmarks have published results for both models. GPT-5.5 Pro has 14 scored results on Noometry and Grok 4.1 has 19.