Model comparison
GPT-5.5 Instant vs Grok 4.1
GPT-5.5 Instant is the stronger model overall, scoring 42.5 to 40.8 on the Noometry Index.
Last verified . 17 shared benchmarks.
Summary
- They share 17 benchmarks with published results for both. GPT-5.5 Instant scores higher in 4 categories and Grok 4.1 in 4 categories; 4 gaps are clear of the uncertainty.
- The widest gap is in coding, where GPT-5.5 Instant leads 43.7 to 33.4.
Side by side
| GPT-5.5 Instant | Grok 4.1 | |
|---|---|---|
| Provider | OpenAI | xAI |
| Noometry Index | 42.5 | 40.8 |
| Released | 2026-05-05 | 2025-11-17 |
| Weights | Proprietary | Proprietary |
| Context window | — | — |
| Max output | — | — |
| Input $ / M tokens | — | — |
| Output $ / M tokens | — | — |
| Results tracked | 27 | 19 |
Sponsored placements are available on pages like this one. Advertise on Noometry
Category by category
Coding GPT-5.5 Instant leads
GPT-5.5 Instant: 43.7 (#73), Grok 4.1: 33.4 (#246)
| Benchmark | GPT-5.5 Instant | Grok 4.1 |
|---|---|---|
| LMArena Coding | 1433 | 1445 |
| LMArena WebDev | — | 1214 |
| SciCode | 48.6% | — |
Agentic & Tool Use Not comparable
GPT-5.5 Instant: —, Grok 4.1: 33.8 (#47)
| Benchmark | GPT-5.5 Instant | Grok 4.1 |
|---|---|---|
| Cybench | — | 39% |
Reasoning Grok 4.1 leads
GPT-5.5 Instant: 24.2 (#149), Grok 4.1: 28.3 (#91)
| Benchmark | GPT-5.5 Instant | Grok 4.1 |
|---|---|---|
| LMArena Hard Prompts | 1426 | 1436 |
| CritPt | 0% | — |
| Chess Puzzles | 12% | — |
| Epoch Capabilities Index | 142.48 | — |
Math Grok 4.1 leads
GPT-5.5 Instant: 26.1 (#241), Grok 4.1: 36.2 (#124)
| Benchmark | GPT-5.5 Instant | Grok 4.1 |
|---|---|---|
| LMArena Math | 1420 | 1422 |
| FrontierMath (Tiers 1-3) | 26.3% | — |
| FrontierMath Tier 4 | 2.4% | — |
| OTIS Mock AIME 2024-2025 | 68.1% | — |
Knowledge GPT-5.5 Instant leads
GPT-5.5 Instant: 48.9 (#68), Grok 4.1: 38.9 (#129)
| Benchmark | GPT-5.5 Instant | Grok 4.1 |
|---|---|---|
| LMArena Expert | 1409 | 1417 |
| GPQA Diamond | 82.5% | — |
Multimodal Not comparable
GPT-5.5 Instant: 39.3 (#48), Grok 4.1: —
| Benchmark | GPT-5.5 Instant | Grok 4.1 |
|---|---|---|
| LMArena Vision | 1250 | — |
| LMArena Document | 1403 | — |
Multilingual Too close to call
GPT-5.5 Instant: 53.0 (#76), Grok 4.1: 53.6 (#64)
| Benchmark | GPT-5.5 Instant | Grok 4.1 |
|---|---|---|
| LMArena Non-English | 1417 | 1425 |
| LMArena Chinese | 1457 | 1464 |
| LMArena French | 1428 | 1448 |
| LMArena German | 1410 | 1447 |
| LMArena Japanese | 1408 | 1396 |
| LMArena Korean | 1393 | 1407 |
| LMArena Russian | 1430 | 1434 |
| LMArena Spanish | 1430 | 1438 |
Instruction Following Too close to call
GPT-5.5 Instant: 74.4 (#94), Grok 4.1: 74.0 (#106)
| Benchmark | GPT-5.5 Instant | Grok 4.1 |
|---|---|---|
| LMArena Instruction Following | 1407 | 1400 |
Long Context Too close to call
GPT-5.5 Instant: 43.4 (#92), Grok 4.1: 43.2 (#96)
| Benchmark | GPT-5.5 Instant | Grok 4.1 |
|---|---|---|
| LMArena Longer Query | 1422 | 1416 |
Writing & Preference Too close to call
GPT-5.5 Instant: 62.0 (#81), Grok 4.1: 62.6 (#71)
| Benchmark | GPT-5.5 Instant | Grok 4.1 |
|---|---|---|
| LMArena Text | 1419 | 1437 |
| LMArena Creative Writing | 1420 | 1411 |
| LMArena Multi-Turn | 1434 | 1438 |
Frequently asked questions
Is GPT-5.5 Instant better than Grok 4.1?
GPT-5.5 Instant is the stronger model overall, scoring 42.5 to 40.8 on the Noometry Index.
Is GPT-5.5 Instant or Grok 4.1 better for coding?
GPT-5.5 Instant scores higher on coding benchmarks: 43.7 versus 33.4 in the Noometry coding category.
How many benchmarks do GPT-5.5 Instant and Grok 4.1 share?
17 benchmarks have published results for both models. GPT-5.5 Instant has 27 scored results on Noometry and Grok 4.1 has 19.