Model comparison
GPT-5.3 Chat vs Grok 4.1
GPT-5.3 Chat is the stronger model overall, scoring 42.1 to 40.8 on the Noometry Index.
Last verified . 17 shared benchmarks.
Summary
- They share 17 benchmarks with published results for both. GPT-5.3 Chat scores higher in 2 categories and Grok 4.1 in 6 categories; 3 gaps are clear of the uncertainty.
- The widest gap is in coding, where GPT-5.3 Chat leads 40.8 to 33.4.
Side by side
| GPT-5.3 Chat | Grok 4.1 | |
|---|---|---|
| Provider | OpenAI | xAI |
| Noometry Index | 42.1 | 40.8 |
| Released | 2026-03-03 | 2025-11-17 |
| Weights | Proprietary | Proprietary |
| Context window | 128K | — |
| Max output | 16K | — |
| Input $ / M tokens | $1.75 | — |
| Output $ / M tokens | $14 | — |
| Results tracked | 18 | 19 |
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Category by category
Coding GPT-5.3 Chat leads
GPT-5.3 Chat: 40.8 (#124), Grok 4.1: 33.4 (#246)
| Benchmark | GPT-5.3 Chat | Grok 4.1 |
|---|---|---|
| LMArena Coding | 1408 | 1445 |
| LMArena WebDev | — | 1214 |
Agentic & Tool Use Not comparable
GPT-5.3 Chat: —, Grok 4.1: 33.8 (#47)
| Benchmark | GPT-5.3 Chat | Grok 4.1 |
|---|---|---|
| Cybench | — | 39% |
Reasoning Too close to call
GPT-5.3 Chat: 27.3 (#105), Grok 4.1: 28.3 (#91)
| Benchmark | GPT-5.3 Chat | Grok 4.1 |
|---|---|---|
| LMArena Hard Prompts | 1399 | 1436 |
Math Too close to call
GPT-5.3 Chat: 35.4 (#146), Grok 4.1: 36.2 (#124)
| Benchmark | GPT-5.3 Chat | Grok 4.1 |
|---|---|---|
| LMArena Math | 1389 | 1422 |
Knowledge Too close to call
GPT-5.3 Chat: 38.2 (#137), Grok 4.1: 38.9 (#129)
| Benchmark | GPT-5.3 Chat | Grok 4.1 |
|---|---|---|
| LMArena Expert | 1397 | 1417 |
Multilingual Grok 4.1 leads
GPT-5.3 Chat: 50.5 (#119), Grok 4.1: 53.6 (#64)
| Benchmark | GPT-5.3 Chat | Grok 4.1 |
|---|---|---|
| LMArena Non-English | 1383 | 1425 |
| LMArena Chinese | 1433 | 1464 |
| LMArena French | 1398 | 1448 |
| LMArena German | 1384 | 1447 |
| LMArena Japanese | 1351 | 1396 |
| LMArena Korean | 1347 | 1407 |
| LMArena Russian | 1400 | 1434 |
| LMArena Spanish | 1371 | 1438 |
Instruction Following Grok 4.1 leads
GPT-5.3 Chat: 73.0 (#124), Grok 4.1: 74.0 (#106)
| Benchmark | GPT-5.3 Chat | Grok 4.1 |
|---|---|---|
| LMArena Instruction Following | 1378 | 1400 |
Long Context Too close to call
GPT-5.3 Chat: 42.6 (#115), Grok 4.1: 43.2 (#96)
| Benchmark | GPT-5.3 Chat | Grok 4.1 |
|---|---|---|
| LMArena Longer Query | 1396 | 1416 |
Writing & Preference Too close to call
GPT-5.3 Chat: 63.3 (#65), Grok 4.1: 62.6 (#71)
| Benchmark | GPT-5.3 Chat | Grok 4.1 |
|---|---|---|
| LMArena Text | 1389 | 1437 |
| LMArena Creative Writing | 1356 | 1411 |
| LMArena Multi-Turn | 1413 | 1438 |
| EQ-Bench Creative Writing | 1690 | — |
Frequently asked questions
Is GPT-5.3 Chat better than Grok 4.1?
GPT-5.3 Chat is the stronger model overall, scoring 42.1 to 40.8 on the Noometry Index.
Is GPT-5.3 Chat or Grok 4.1 better for coding?
GPT-5.3 Chat scores higher on coding benchmarks: 40.8 versus 33.4 in the Noometry coding category.
How many benchmarks do GPT-5.3 Chat and Grok 4.1 share?
17 benchmarks have published results for both models. GPT-5.3 Chat has 18 scored results on Noometry and Grok 4.1 has 19.