# Chatgpt 4o Latest 20250326 vs DeepSeek V4 Flash

> DeepSeek V4 Flash is the stronger model overall, scoring 53.6 to 43.8 on the Noometry Index.

- Canonical page: https://noometry.com/compare/chatgpt-4o-vs-deepseek-v4-flash
- Last updated: 2026-10-11
- Shared benchmarks: 19

## Summary

- They share 19 benchmarks with published results for both. Chatgpt 4o Latest 20250326 scores higher in 0 categories and DeepSeek V4 Flash in 8 categories; 5 gaps are clear of the uncertainty.
- The widest gap is in math, where DeepSeek V4 Flash leads 60.3 to 38.6.
- The biggest single-benchmark swing is Kagi LLM Benchmark: 75% for Chatgpt 4o Latest 20250326 and 52.2% for DeepSeek V4 Flash.
- DeepSeek V4 Flash has downloadable open weights; the other is API-only.

## Snapshot

| | Chatgpt 4o Latest 20250326 | DeepSeek V4 Flash |
|---|---|---|
| Provider | OpenAI | DeepSeek |
| Noometry Index | 43.8 | 53.6 |
| Rank | 82 | 35 |
| Context | — | 1M |
| Input $/M | — | $0.15 |
| Output $/M | — | $0.60 |
| Weights | Proprietary | Open |

## Coding

- Chatgpt 4o Latest 20250326: 41.6 (#122)
- DeepSeek V4 Flash: 47.9 (#59)

| Benchmark | Chatgpt 4o Latest 20250326 | DeepSeek V4 Flash |
|---|---|---|
| LMArena Coding | 1413 | 1457 |
| FrontierCode | — | 18.8% |
| LMArena WebDev | — | 1582 |
| SciCode | — | 49.9% |
| WeirdML | — | 63% |
| ALE-Bench | — | 1,306 |

## Reasoning

- Chatgpt 4o Latest 20250326: 33.8 (#71)
- DeepSeek V4 Flash: 53.7 (#30)

| Benchmark | Chatgpt 4o Latest 20250326 | DeepSeek V4 Flash |
|---|---|---|
| Kagi LLM Benchmark | 75% | 52.2% |
| LMArena Hard Prompts | 1424 | 1444 |
| ARC-AGI-2 | — | 61.4% |
| SimpleBench | — | 61.1% |
| NYT Connections (extended) | — | 89.6% |
| ARC-AGI-1 | — | 89% |
| CritPt | — | 16.6% |
| Chess Puzzles | — | 33% |
| Mystery Game Puzzles | — | 34% |
| DTBench | — | 90.9% |
| LMCA | — | 41.7% |
| Epoch Capabilities Index | — | 154.49 |

## Math

- Chatgpt 4o Latest 20250326: 38.6 (#134)
- DeepSeek V4 Flash: 60.3 (#37)

| Benchmark | Chatgpt 4o Latest 20250326 | DeepSeek V4 Flash |
|---|---|---|
| LMArena Math | 1407 | 1427 |
| FrontierMath (Tiers 1-3) | — | 57.5% |
| FrontierMath Tier 4 | — | 24.4% |
| MathArena Final-Answer Competitions | — | 76.5% |
| OTIS Mock AIME 2024-2025 | — | 94.4% |
| ProofBench | — | 56% |

## Knowledge

- Chatgpt 4o Latest 20250326: 39.2 (#137)
- DeepSeek V4 Flash: 55.4 (#48)

| Benchmark | Chatgpt 4o Latest 20250326 | DeepSeek V4 Flash |
|---|---|---|
| LMArena Expert | 1401 | 1441 |
| GPQA Diamond | — | 91% |
| SimpleQA Verified | — | 33.6% |
| Confabulations | 16.6% | — |

## Multimodal

- Chatgpt 4o Latest 20250326: 39.6 (#58)
- DeepSeek V4 Flash: —

| Benchmark | Chatgpt 4o Latest 20250326 | DeepSeek V4 Flash |
|---|---|---|
| LMArena Vision | 1243 | — |

## Multilingual

- Chatgpt 4o Latest 20250326: 52.9 (#76)
- DeepSeek V4 Flash: 53.0 (#72)

| Benchmark | Chatgpt 4o Latest 20250326 | DeepSeek V4 Flash |
|---|---|---|
| LMArena Non-English | 1419 | 1420 |
| LMArena Chinese | 1457 | 1468 |
| LMArena French | 1446 | 1439 |
| LMArena German | 1423 | 1418 |
| LMArena Japanese | 1405 | 1406 |
| LMArena Korean | 1396 | 1384 |
| LMArena Russian | 1429 | 1428 |
| LMArena Spanish | 1434 | 1436 |

## Instruction Following

- Chatgpt 4o Latest 20250326: 74.0 (#107)
- DeepSeek V4 Flash: 74.9 (#81)

| Benchmark | Chatgpt 4o Latest 20250326 | DeepSeek V4 Flash |
|---|---|---|
| LMArena Instruction Following | 1403 | 1421 |

## Long Context

- Chatgpt 4o Latest 20250326: 43.1 (#107)
- DeepSeek V4 Flash: 43.8 (#85)

| Benchmark | Chatgpt 4o Latest 20250326 | DeepSeek V4 Flash |
|---|---|---|
| LMArena Longer Query | 1413 | 1434 |

## Writing & Preference

- Chatgpt 4o Latest 20250326: 62.6 (#72)
- DeepSeek V4 Flash: 63.8 (#61)

| Benchmark | Chatgpt 4o Latest 20250326 | DeepSeek V4 Flash |
|---|---|---|
| LMArena Text | 1429 | 1432 |
| LMArena Creative Writing | 1405 | 1403 |
| EQ-Bench Creative Writing | 1501 | 1559 |
| LMArena Multi-Turn | 1454 | 1449 |

## FAQ

### Is Chatgpt 4o Latest 20250326 better than DeepSeek V4 Flash?

DeepSeek V4 Flash is the stronger model overall, scoring 53.6 to 43.8 on the Noometry Index.

### Is Chatgpt 4o Latest 20250326 or DeepSeek V4 Flash better for coding?

DeepSeek V4 Flash scores higher on coding benchmarks: 47.9 versus 41.6 in the Noometry coding category.

### How many benchmarks do Chatgpt 4o Latest 20250326 and DeepSeek V4 Flash share?

19 benchmarks have published results for both models. Chatgpt 4o Latest 20250326 has 21 scored results on Noometry and DeepSeek V4 Flash has 41.