Model comparison
Grok 4.20 (Non-Reasoning) vs Longcat Flash Chat
Grok 4.20 (Non-Reasoning) is the stronger model overall, scoring 48.5 to 41.5 on the Noometry Index.
Last verified . 19 shared benchmarks.
Summary
- They share 19 benchmarks with published results for both. Grok 4.20 (Non-Reasoning) scores higher in 7 categories and Longcat Flash Chat in 1 category; 7 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Grok 4.20 (Non-Reasoning) leads 52.2 to 18.3.
- The biggest single-benchmark swing is NYT Connections (extended): 85.4% for Grok 4.20 (Non-Reasoning) and 17.7% for Longcat Flash Chat.
- Longcat Flash Chat has downloadable open weights; the other is API-only.
Side by side
| Grok 4.20 (Non-Reasoning) | Longcat Flash Chat | |
|---|---|---|
| Provider | xAI | Meituan |
| Noometry Index | 48.5 | 41.5 |
| Released | 2026-02-17 | — |
| Weights | Proprietary | Open |
| Context window | 1M | — |
| Max output | 30K | — |
| Input $ / M tokens | $1.25 | — |
| Output $ / M tokens | $2.50 | — |
| Results tracked | 46 | 19 |
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Category by category
Coding Longcat Flash Chat leads
Grok 4.20 (Non-Reasoning): 41.8 (#104), Longcat Flash Chat: 42.9 (#85)
| Benchmark | Grok 4.20 (Non-Reasoning) | Longcat Flash Chat |
|---|---|---|
| LMArena Coding | 1458 | 1471 |
| LMArena WebDev | 1374 | — |
| WeirdML | 52.3% | — |
| ALE-Bench | 1,150 | — |
Agentic & Tool Use Not comparable
Grok 4.20 (Non-Reasoning): 34.3 (#43), Longcat Flash Chat: —
| Benchmark | Grok 4.20 (Non-Reasoning) | Longcat Flash Chat |
|---|---|---|
| Terminal-Bench | 57.3% | — |
| τ²-bench Banking | 18% | — |
| LMArena Search | 1189 | — |
| Vending-Bench 2 | 4,663 | — |
Reasoning Grok 4.20 (Non-Reasoning) leads
Grok 4.20 (Non-Reasoning): 52.2 (#30), Longcat Flash Chat: 18.3 (#267)
| Benchmark | Grok 4.20 (Non-Reasoning) | Longcat Flash Chat |
|---|---|---|
| Kagi LLM Benchmark | 75% | 43.9% |
| NYT Connections (extended) | 85.4% | 17.7% |
| LMArena Hard Prompts | 1451 | 1440 |
| ARC-AGI-2 | 65.1% | — |
| ARC-AGI-1 | 89.5% | — |
| Chess Puzzles | 24% | — |
| Thematic Generalization | 63.8% | — |
| DTBench | 90.1% | — |
| LMCA | 38.7% | — |
| Epoch Capabilities Index | 152.01 | — |
| ForecastBench | 61.4 | — |
Math Grok 4.20 (Non-Reasoning) leads
Grok 4.20 (Non-Reasoning): 48.0 (#54), Longcat Flash Chat: 36.6 (#107)
| Benchmark | Grok 4.20 (Non-Reasoning) | Longcat Flash Chat |
|---|---|---|
| LMArena Math | 1455 | 1441 |
| FrontierMath (Tiers 1-3) | 44.9% | — |
| FrontierMath Tier 4 | 17.1% | — |
| OTIS Mock AIME 2024-2025 | 92.2% | — |
| ProofBench | 14% | — |
Knowledge Grok 4.20 (Non-Reasoning) leads
Grok 4.20 (Non-Reasoning): 52.8 (#54), Longcat Flash Chat: 40.0 (#111)
| Benchmark | Grok 4.20 (Non-Reasoning) | Longcat Flash Chat |
|---|---|---|
| LMArena Expert | 1440 | 1454 |
| GPQA Diamond | 89.3% | — |
| SimpleQA Verified | 30.2% | — |
Multimodal Not comparable
Grok 4.20 (Non-Reasoning): 33.2 (#88), Longcat Flash Chat: —
| Benchmark | Grok 4.20 (Non-Reasoning) | Longcat Flash Chat |
|---|---|---|
| LMArena Vision | 1263 | — |
| Blueprint-Bench 2 | 0% | — |
| LMArena Document | 1416 | — |
Multilingual Grok 4.20 (Non-Reasoning) leads
Grok 4.20 (Non-Reasoning): 54.7 (#38), Longcat Flash Chat: 52.1 (#95)
| Benchmark | Grok 4.20 (Non-Reasoning) | Longcat Flash Chat |
|---|---|---|
| LMArena Non-English | 1440 | 1404 |
| LMArena Chinese | 1481 | 1465 |
| LMArena French | 1477 | 1457 |
| LMArena German | 1463 | 1409 |
| LMArena Japanese | 1450 | 1373 |
| LMArena Korean | 1417 | 1372 |
| LMArena Russian | 1457 | 1396 |
| LMArena Spanish | 1442 | 1445 |
Instruction Following Too close to call
Grok 4.20 (Non-Reasoning): 75.0 (#79), Longcat Flash Chat: 74.6 (#92)
| Benchmark | Grok 4.20 (Non-Reasoning) | Longcat Flash Chat |
|---|---|---|
| LMArena Instruction Following | 1420 | 1411 |
Long Context Grok 4.20 (Non-Reasoning) leads
Grok 4.20 (Non-Reasoning): 45.4 (#33), Longcat Flash Chat: 43.5 (#89)
| Benchmark | Grok 4.20 (Non-Reasoning) | Longcat Flash Chat |
|---|---|---|
| LMArena Longer Query | 1436 | 1425 |
| CL-bench | 22.2% | — |
| CL-bench Life | 11.9% | — |
Writing & Preference Grok 4.20 (Non-Reasoning) leads
Grok 4.20 (Non-Reasoning): 65.9 (#42), Longcat Flash Chat: 61.2 (#88)
| Benchmark | Grok 4.20 (Non-Reasoning) | Longcat Flash Chat |
|---|---|---|
| LMArena Text | 1451 | 1427 |
| LMArena Creative Writing | 1439 | 1388 |
| LMArena Multi-Turn | 1456 | 1418 |
| EQ-Bench Creative Writing | 1574 | — |
Frequently asked questions
Is Grok 4.20 (Non-Reasoning) better than Longcat Flash Chat?
Grok 4.20 (Non-Reasoning) is the stronger model overall, scoring 48.5 to 41.5 on the Noometry Index.
Is Grok 4.20 (Non-Reasoning) or Longcat Flash Chat better for coding?
Longcat Flash Chat scores higher on coding benchmarks: 42.9 versus 41.8 in the Noometry coding category.
How many benchmarks do Grok 4.20 (Non-Reasoning) and Longcat Flash Chat share?
19 benchmarks have published results for both models. Grok 4.20 (Non-Reasoning) has 46 scored results on Noometry and Longcat Flash Chat has 19.