Model comparison
GPT-5.5 Instant vs Grok 4.7
Grok 4.7 is the stronger model overall, scoring 46.6 to 42.5 on the Noometry Index.
Last verified . 14 shared benchmarks.
Summary
- They share 14 benchmarks with published results for both. GPT-5.5 Instant scores higher in 5 categories and Grok 4.7 in 4 categories; 7 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Grok 4.7 leads 40.1 to 24.2.
- The biggest single-benchmark swing is CritPt: 0% for GPT-5.5 Instant and 17.7% for Grok 4.7.
Side by side
| GPT-5.5 Instant | Grok 4.7 | |
|---|---|---|
| Provider | OpenAI | xAI |
| Noometry Index | 42.5 | 46.6 |
| Released | 2026-05-05 | 2026-09-21 |
| Weights | Proprietary | Proprietary |
| Context window | — | 500K |
| Max output | — | 500K |
| Input $ / M tokens | — | $2 |
| Output $ / M tokens | — | $6 |
| Results tracked | 27 | 21 |
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Category by category
Coding Grok 4.7 leads
GPT-5.5 Instant: 43.7 (#73), Grok 4.7: 55.0 (#23)
| Benchmark | GPT-5.5 Instant | Grok 4.7 |
|---|---|---|
| SciCode | 48.6% | 57.4% |
| LMArena Coding | 1433 | 1423 |
| CursorBench | — | 46.3% |
| LMArena WebDev | — | 1636 |
| FrontierSWE | — | 29.5% |
Reasoning Grok 4.7 leads
GPT-5.5 Instant: 24.2 (#149), Grok 4.7: 40.1 (#49)
| Benchmark | GPT-5.5 Instant | Grok 4.7 |
|---|---|---|
| CritPt | 0% | 17.7% |
| LMArena Hard Prompts | 1426 | 1409 |
| NYT Connections (extended) | — | 76.8% |
| Chess Puzzles | 12% | — |
| Epoch Capabilities Index | 142.48 | — |
Math Grok 4.7 leads
GPT-5.5 Instant: 26.1 (#241), Grok 4.7: 41.1 (#73)
| Benchmark | GPT-5.5 Instant | Grok 4.7 |
|---|---|---|
| LMArena Math | 1420 | 1393 |
| FrontierMath (Tiers 1-3) | 26.3% | — |
| FrontierMath Tier 4 | 2.4% | — |
| OTIS Mock AIME 2024-2025 | 68.1% | — |
| ProofBench | — | 34% |
Knowledge GPT-5.5 Instant leads
GPT-5.5 Instant: 48.9 (#68), Grok 4.7: 38.7 (#130)
| Benchmark | GPT-5.5 Instant | Grok 4.7 |
|---|---|---|
| LMArena Expert | 1409 | 1413 |
| GPQA Diamond | 82.5% | — |
Multimodal GPT-5.5 Instant leads
GPT-5.5 Instant: 39.3 (#48), Grok 4.7: 28.8 (#107)
| Benchmark | GPT-5.5 Instant | Grok 4.7 |
|---|---|---|
| LMArena Vision | 1250 | — |
| Furniture Assembly | — | 20.8% |
| LMArena Document | 1403 | — |
Multilingual GPT-5.5 Instant leads
GPT-5.5 Instant: 53.0 (#76), Grok 4.7: 51.2 (#108)
| Benchmark | GPT-5.5 Instant | Grok 4.7 |
|---|---|---|
| LMArena Non-English | 1417 | 1392 |
| LMArena Chinese | 1457 | 1476 |
| LMArena Russian | 1430 | 1396 |
| LMArena French | 1428 | — |
| LMArena German | 1410 | — |
| LMArena Japanese | 1408 | — |
| LMArena Korean | 1393 | — |
| LMArena Spanish | 1430 | — |
Instruction Following Too close to call
GPT-5.5 Instant: 74.4 (#94), Grok 4.7: 74.3 (#98)
| Benchmark | GPT-5.5 Instant | Grok 4.7 |
|---|---|---|
| LMArena Instruction Following | 1407 | 1406 |
Long Context Too close to call
GPT-5.5 Instant: 43.4 (#92), Grok 4.7: 43.2 (#97)
| Benchmark | GPT-5.5 Instant | Grok 4.7 |
|---|---|---|
| LMArena Longer Query | 1422 | 1416 |
Writing & Preference Grok 4.7 leads
GPT-5.5 Instant: 62.0 (#81), Grok 4.7: 70.1 (#23)
| Benchmark | GPT-5.5 Instant | Grok 4.7 |
|---|---|---|
| LMArena Text | 1419 | 1397 |
| LMArena Creative Writing | 1420 | 1391 |
| LMArena Multi-Turn | 1434 | 1389 |
| EQ-Bench Creative Writing | — | 2007 |
Frequently asked questions
Is GPT-5.5 Instant better than Grok 4.7?
Grok 4.7 is the stronger model overall, scoring 46.6 to 42.5 on the Noometry Index.
Is GPT-5.5 Instant or Grok 4.7 better for coding?
Grok 4.7 scores higher on coding benchmarks: 55.0 versus 43.7 in the Noometry coding category.
How many benchmarks do GPT-5.5 Instant and Grok 4.7 share?
14 benchmarks have published results for both models. GPT-5.5 Instant has 27 scored results on Noometry and Grok 4.7 has 21.