Model comparison
DeepSeek V4.1 Flash vs Grok 4 Heavy
DeepSeek V4.1 Flash has enough public results to be ranked (#40); Grok 4 Heavy does not yet, so treat this comparison as directional.
Last verified . 0 shared benchmarks.
DeepSeekSummary
- DeepSeek V4.1 Flash has downloadable open weights; the other is API-only.
Side by side
| DeepSeek V4.1 Flash | Grok 4 Heavy | |
|---|---|---|
| Provider | DeepSeek | xAI |
| Noometry Index | 50.3 | — |
| Released | 2026-09-09 | 2025-07-10 |
| Weights | Open | Proprietary |
| Context window | 1M | — |
| Max output | 393K | — |
| Input $ / M tokens | $0.15 | — |
| Output $ / M tokens | $0.60 | — |
| Results tracked | 25 | 1 |
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Category by category
Coding Not comparable
DeepSeek V4.1 Flash: 52.8 (#29), Grok 4 Heavy: —
| Benchmark | DeepSeek V4.1 Flash | Grok 4 Heavy |
|---|---|---|
| LMArena WebDev | 1620 | — |
| SciCode | 51.9% | — |
| LMArena Coding | 1511 | — |
| ALE-Bench | 1,092 | — |
Reasoning Not comparable
DeepSeek V4.1 Flash: 46.2 (#39), Grok 4 Heavy: —
| Benchmark | DeepSeek V4.1 Flash | Grok 4 Heavy |
|---|---|---|
| NYT Connections (extended) | 89.6% | — |
| CritPt | 14.3% | — |
| LMArena Hard Prompts | 1485 | — |
| DTBench | 89.9% | — |
| LMCA | 47% | — |
| Surface Evolver Bench | 46.3% | — |
| Epoch Capabilities Index | 155.01 | — |
Math Not comparable
DeepSeek V4.1 Flash: 48.4 (#52), Grok 4 Heavy: —
| Benchmark | DeepSeek V4.1 Flash | Grok 4 Heavy |
|---|---|---|
| ProofBench | 54% | — |
| LMArena Math | 1493 | — |
| FrontierMath Tier 4 (v1) | — | 2.1% |
Knowledge Not comparable
DeepSeek V4.1 Flash: 41.6 (#97), Grok 4 Heavy: —
| Benchmark | DeepSeek V4.1 Flash | Grok 4 Heavy |
|---|---|---|
| LMArena Expert | 1505 | — |
Multilingual Not comparable
DeepSeek V4.1 Flash: 55.5 (#29), Grok 4 Heavy: —
| Benchmark | DeepSeek V4.1 Flash | Grok 4 Heavy |
|---|---|---|
| LMArena Non-English | 1452 | — |
| LMArena Chinese | 1506 | — |
| LMArena French | 1448 | — |
| LMArena Russian | 1473 | — |
| LMArena Spanish | 1499 | — |
Instruction Following Not comparable
DeepSeek V4.1 Flash: 77.6 (#24), Grok 4 Heavy: —
| Benchmark | DeepSeek V4.1 Flash | Grok 4 Heavy |
|---|---|---|
| LMArena Instruction Following | 1475 | — |
Long Context Not comparable
DeepSeek V4.1 Flash: 45.2 (#46), Grok 4 Heavy: —
| Benchmark | DeepSeek V4.1 Flash | Grok 4 Heavy |
|---|---|---|
| LMArena Longer Query | 1476 | — |
Writing & Preference Not comparable
DeepSeek V4.1 Flash: 65.8 (#43), Grok 4 Heavy: —
| Benchmark | DeepSeek V4.1 Flash | Grok 4 Heavy |
|---|---|---|
| LMArena Text | 1465 | — |
| LMArena Creative Writing | 1436 | — |
| EQ-Bench Creative Writing | 1540 | — |
| LMArena Multi-Turn | 1460 | — |
Frequently asked questions
Is DeepSeek V4.1 Flash better than Grok 4 Heavy?
DeepSeek V4.1 Flash has enough public results to be ranked (#40); Grok 4 Heavy does not yet, so treat this comparison as directional.
How many benchmarks do DeepSeek V4.1 Flash and Grok 4 Heavy share?
0 benchmarks have published results for both models. DeepSeek V4.1 Flash has 25 scored results on Noometry and Grok 4 Heavy has 1.