# Claude Opus 4 vs DeepSeek V4 Flash

> DeepSeek V4 Flash is the stronger model overall, scoring 53.6 to 43.1 on the Noometry Index.

- Canonical page: https://noometry.com/compare/claude-opus-4-vs-deepseek-v4-flash
- Last updated: 2026-10-11
- Shared benchmarks: 29

## Summary

- They share 29 benchmarks with published results for both. Claude Opus 4 scores higher in 1 category and DeepSeek V4 Flash in 7 categories; 7 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where DeepSeek V4 Flash leads 53.7 to 27.3.
- The biggest single-benchmark swing is ARC-AGI-1: 35.7% for Claude Opus 4 and 89% for DeepSeek V4 Flash.
- DeepSeek V4 Flash is cheaper at $0.15 / $0.60 per million input/output tokens, against $15 / $75 for Claude Opus 4.
- DeepSeek V4 Flash accepts more context: 1M tokens versus 200K.
- DeepSeek V4 Flash has downloadable open weights; the other is API-only.

## Snapshot

| | Claude Opus 4 | DeepSeek V4 Flash |
|---|---|---|
| Provider | Anthropic | DeepSeek |
| Noometry Index | 43.1 | 53.6 |
| Rank | 100 | 35 |
| Context | 200K | 1M |
| Input $/M | $15 | $0.15 |
| Output $/M | $75 | $0.60 |
| Weights | Proprietary | Open |

## Coding

- Claude Opus 4: 47.2 (#62)
- DeepSeek V4 Flash: 47.9 (#59)

| Benchmark | Claude Opus 4 | DeepSeek V4 Flash |
|---|---|---|
| WeirdML | 43.7% | 63% |
| LMArena Coding | 1442 | 1457 |
| SWE-bench Verified | 70.7% | — |
| FrontierCode | — | 18.8% |
| SWE-bench Verified (bash only) | 67.6% | — |
| Aider Polyglot | 72% | — |
| LMArena WebDev | — | 1582 |
| SciCode | — | 49.9% |
| GSO | 6.9% | — |
| ALE-Bench | — | 1,306 |
| AlgoTune | 1.33 | — |

## Agentic & Tool Use

- Claude Opus 4: 34.8 (#42)
- DeepSeek V4 Flash: —

| Benchmark | Claude Opus 4 | DeepSeek V4 Flash |
|---|---|---|
| Cybench | 38% | — |
| DeepResearch Bench | 46.8% | — |
| LMArena Search | 1127 | — |
| METR Time Horizons | 63.9% | — |

## Reasoning

- Claude Opus 4: 27.3 (#121)
- DeepSeek V4 Flash: 53.7 (#30)

| Benchmark | Claude Opus 4 | DeepSeek V4 Flash |
|---|---|---|
| ARC-AGI-2 | 8.6% | 61.4% |
| SimpleBench | 58.8% | 61.1% |
| Kagi LLM Benchmark | 74.3% | 52.2% |
| ARC-AGI-1 | 35.7% | 89% |
| CritPt | 0.3% | 16.6% |
| LMArena Hard Prompts | 1399 | 1444 |
| DTBench | 81.6% | 90.9% |
| LMCA | 37.4% | 41.7% |
| Epoch Capabilities Index | 142.67 | 154.49 |
| NYT Connections (extended) | — | 89.6% |
| Chess Puzzles | — | 33% |
| EnigmaEval | 5.6% | — |
| Mystery Game Puzzles | — | 34% |
| ForecastBench | 61.1 | — |

## Math

- Claude Opus 4: 42.0 (#86)
- DeepSeek V4 Flash: 60.3 (#37)

| Benchmark | Claude Opus 4 | DeepSeek V4 Flash |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 64.4% | 94.4% |
| LMArena Math | 1390 | 1427 |
| FrontierMath (Tiers 1-3) | — | 57.5% |
| FrontierMath Tier 4 | — | 24.4% |
| MathArena Final-Answer Competitions | — | 76.5% |
| ProofBench | — | 56% |
| Omni-MATH | 61.6% | — |
| MATH Level 5 | 85% | — |
| FrontierMath (Feb 2025 set) | 4.5% | — |
| FrontierMath Tier 4 (v1) | 4.2% | — |

## Knowledge

- Claude Opus 4: 44.0 (#88)
- DeepSeek V4 Flash: 55.4 (#48)

| Benchmark | Claude Opus 4 | DeepSeek V4 Flash |
|---|---|---|
| GPQA Diamond | 76.3% | 91% |
| LMArena Expert | 1386 | 1441 |
| Humanity's Last Exam | 10.7% | — |
| SimpleQA Verified | — | 33.6% |
| MMLU-Pro | 87.5% | — |
| Confabulations | 15.9% | — |
| Vectara Hallucination Rate | 12% | — |
| GPQA (HELM) | 70.8% | — |

## Multimodal

- Claude Opus 4: 31.5 (#106)
- DeepSeek V4 Flash: —

| Benchmark | Claude Opus 4 | DeepSeek V4 Flash |
|---|---|---|
| LMArena Vision | 1192 | — |
| GeoBench | 49% | — |
| VPCT | 38% | — |

## Multilingual

- Claude Opus 4: 48.8 (#138)
- DeepSeek V4 Flash: 53.0 (#72)

| Benchmark | Claude Opus 4 | DeepSeek V4 Flash |
|---|---|---|
| LMArena Non-English | 1362 | 1420 |
| LMArena Chinese | 1386 | 1468 |
| LMArena French | 1372 | 1439 |
| LMArena German | 1391 | 1418 |
| LMArena Japanese | 1331 | 1406 |
| LMArena Korean | 1321 | 1384 |
| LMArena Russian | 1392 | 1428 |
| LMArena Spanish | 1389 | 1436 |

## Instruction Following

- Claude Opus 4: 77.1 (#28)
- DeepSeek V4 Flash: 74.9 (#81)

| Benchmark | Claude Opus 4 | DeepSeek V4 Flash |
|---|---|---|
| LMArena Instruction Following | 1406 | 1421 |
| IFEval | 91.8% | — |

## Long Context

- Claude Opus 4: 39.6 (#172)
- DeepSeek V4 Flash: 43.8 (#85)

| Benchmark | Claude Opus 4 | DeepSeek V4 Flash |
|---|---|---|
| LMArena Longer Query | 1422 | 1434 |
| Fiction.LiveBench | 61.1% | — |

## Writing & Preference

- Claude Opus 4: 61.2 (#89)
- DeepSeek V4 Flash: 63.8 (#61)

| Benchmark | Claude Opus 4 | DeepSeek V4 Flash |
|---|---|---|
| LMArena Text | 1377 | 1432 |
| LMArena Creative Writing | 1387 | 1403 |
| EQ-Bench Creative Writing | 1580 | 1559 |
| LMArena Multi-Turn | 1396 | 1449 |
| Short-Story Creative Writing | 83.6% | — |
| WildBench | 85.2% | — |

## FAQ

### Is Claude Opus 4 better than DeepSeek V4 Flash?

DeepSeek V4 Flash is the stronger model overall, scoring 53.6 to 43.1 on the Noometry Index.

### Which is cheaper, Claude Opus 4 or DeepSeek V4 Flash?

DeepSeek V4 Flash is cheaper. It lists at $0.15 per million input tokens and $0.60 per million output tokens; Claude Opus 4 lists at $15 and $75.

### Is Claude Opus 4 or DeepSeek V4 Flash better for coding?

They score almost the same on coding (47.2 vs 47.9); test both on your own repository before choosing.

### Which has the bigger context window?

DeepSeek V4 Flash does, with 1M tokens against 200K.

### How many benchmarks do Claude Opus 4 and DeepSeek V4 Flash share?

29 benchmarks have published results for both models. Claude Opus 4 has 56 scored results on Noometry and DeepSeek V4 Flash has 41.