Model comparison
Grok 3 vs Longcat Flash Chat
Longcat Flash Chat is the stronger model overall, scoring 42.1 to 39.9 on the Noometry Index.
Last verified . 18 shared benchmarks.
Summary
- They share 18 benchmarks with published results for both. Grok 3 scores higher in 3 categories and Longcat Flash Chat in 5 categories; 6 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where Grok 3 leads 46.2 to 40.6.
- The biggest single-benchmark swing is Kagi LLM Benchmark: 61.3% for Grok 3 and 43.9% for Longcat Flash Chat.
- Longcat Flash Chat has downloadable open weights; the other is API-only.
Side by side
| Grok 3 | Longcat Flash Chat | |
|---|---|---|
| Provider | xAI | Meituan |
| Noometry Index | 39.9 | 42.1 |
| Released | 2025-04-09 | — |
| Weights | Proprietary | Open |
| Context window | — | — |
| Max output | — | — |
| Input $ / M tokens | — | — |
| Output $ / M tokens | — | — |
| Results tracked | 40 | 19 |
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Category by category
Coding Longcat Flash Chat leads
Grok 3: 41.9 (#115), Longcat Flash Chat: 43.5 (#87)
| Benchmark | Grok 3 | Longcat Flash Chat |
|---|---|---|
| LMArena Coding | 1432 | 1471 |
| Aider Polyglot | 53.3% | — |
| WeirdML | 37.2% | — |
Agentic & Tool Use Not comparable
Grok 3: 30.5 (#76), Longcat Flash Chat: —
| Benchmark | Grok 3 | Longcat Flash Chat |
|---|---|---|
| BALROG | 29.5% | — |
Reasoning Longcat Flash Chat leads
Grok 3: 13.7 (#333), Longcat Flash Chat: 19.0 (#272)
| Benchmark | Grok 3 | Longcat Flash Chat |
|---|---|---|
| Kagi LLM Benchmark | 61.3% | 43.9% |
| LMArena Hard Prompts | 1434 | 1440 |
| ARC-AGI-2 | 0% | — |
| SimpleBench | 36.1% | — |
| NYT Connections (extended) | — | 17.7% |
| ARC-AGI-1 | 5.5% | — |
| Epoch Capabilities Index | 138.33 | — |
Math Longcat Flash Chat leads
Grok 3: 38.0 (#145), Longcat Flash Chat: 39.4 (#107)
| Benchmark | Grok 3 | Longcat Flash Chat |
|---|---|---|
| LMArena Math | 1391 | 1442 |
| OTIS Mock AIME 2024-2025 | 55.6% | — |
| Omni-MATH | 46.4% | — |
| MATH Level 5 | 88.7% | — |
| FrontierMath (Feb 2025 set) | 3.8% | — |
| FrontierMath Tier 4 (v1) | 0% | — |
Knowledge Grok 3 leads
Grok 3: 46.2 (#82), Longcat Flash Chat: 40.6 (#116)
| Benchmark | Grok 3 | Longcat Flash Chat |
|---|---|---|
| LMArena Expert | 1421 | 1454 |
| GPQA Diamond | 75.8% | — |
| MMLU-Pro | 78.8% | — |
| Confabulations | 14.2% | — |
| Vectara Hallucination Rate | 5.8% | — |
| GPQA (HELM) | 65% | — |
Multilingual Too close to call
Grok 3: 52.3 (#87), Longcat Flash Chat: 51.9 (#101)
| Benchmark | Grok 3 | Longcat Flash Chat |
|---|---|---|
| LMArena Non-English | 1410 | 1404 |
| LMArena Chinese | 1448 | 1465 |
| LMArena French | 1460 | 1456 |
| LMArena German | 1431 | 1408 |
| LMArena Japanese | 1387 | 1373 |
| LMArena Korean | 1373 | 1371 |
| LMArena Russian | 1416 | 1395 |
| LMArena Spanish | 1417 | 1445 |
Instruction Following Too close to call
Grok 3: 75.0 (#73), Longcat Flash Chat: 74.4 (#96)
| Benchmark | Grok 3 | Longcat Flash Chat |
|---|---|---|
| LMArena Instruction Following | 1409 | 1411 |
| IFEval | 88.4% | — |
Long Context Longcat Flash Chat leads
Grok 3: 38.7 (#192), Longcat Flash Chat: 43.5 (#93)
| Benchmark | Grok 3 | Longcat Flash Chat |
|---|---|---|
| LMArena Longer Query | 1439 | 1425 |
| Fiction.LiveBench | 58.3% | — |
Writing & Preference Longcat Flash Chat leads
Grok 3: 55.8 (#141), Longcat Flash Chat: 61.0 (#91)
| Benchmark | Grok 3 | Longcat Flash Chat |
|---|---|---|
| LMArena Text | 1426 | 1427 |
| LMArena Creative Writing | 1414 | 1388 |
| LMArena Multi-Turn | 1425 | 1418 |
| Short-Story Creative Writing | 76.4% | — |
| EQ-Bench Creative Writing | 1186 | — |
| WildBench | 84.9% | — |
Frequently asked questions
Is Grok 3 better than Longcat Flash Chat?
Longcat Flash Chat is the stronger model overall, scoring 42.1 to 39.9 on the Noometry Index.
Is Grok 3 or Longcat Flash Chat better for coding?
Longcat Flash Chat scores higher on coding benchmarks: 43.5 versus 41.9 in the Noometry coding category.
How many benchmarks do Grok 3 and Longcat Flash Chat share?
18 benchmarks have published results for both models. Grok 3 has 40 scored results on Noometry and Longcat Flash Chat has 19.