# Deepseek Coder v2 vs GPT-5.3 Chat

> GPT-5.3 Chat is the stronger model overall, scoring 42.8 to 35.9 on the Noometry Index.

- Canonical page: https://noometry.com/compare/deepseek-coder-v2-vs-gpt-5-3-chat
- Last updated: 2026-10-11
- Shared benchmarks: 17

## Summary

- They share 17 benchmarks with published results for both. Deepseek Coder v2 scores higher in 0 categories and GPT-5.3 Chat in 8 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in writing & preference, where GPT-5.3 Chat leads 63.1 to 38.2.
- Deepseek Coder v2 has downloadable open weights; the other is API-only.

## Snapshot

| | Deepseek Coder v2 | GPT-5.3 Chat |
|---|---|---|
| Provider | DeepSeek | OpenAI |
| Noometry Index | 35.9 | 42.8 |
| Rank | 220 | 109 |
| Context | — | 128K |
| Input $/M | — | $1.75 |
| Output $/M | — | $14 |
| Weights | Open | Proprietary |

## Coding

- Deepseek Coder v2: 38.1 (#183)
- GPT-5.3 Chat: 41.4 (#124)

| Benchmark | Deepseek Coder v2 | GPT-5.3 Chat |
|---|---|---|
| LMArena Coding | 1251 | 1408 |
| BigCodeBench Instruct | 48.2% | — |
| BigCodeBench Complete | 59.7% | — |
| HumanEval+ | 82.3% | — |
| MBPP+ | 75.1% | — |

## Reasoning

- Deepseek Coder v2: 23.6 (#176)
- GPT-5.3 Chat: 28.5 (#102)

| Benchmark | Deepseek Coder v2 | GPT-5.3 Chat |
|---|---|---|
| LMArena Hard Prompts | 1207 | 1399 |
| WinoGrande | 83.7% | — |

## Math

- Deepseek Coder v2: 34.9 (#190)
- GPT-5.3 Chat: 38.2 (#142)

| Benchmark | Deepseek Coder v2 | GPT-5.3 Chat |
|---|---|---|
| LMArena Math | 1241 | 1389 |
| GSM8K | 94.5% | — |

## Knowledge

- Deepseek Coder v2: 32.3 (#212)
- GPT-5.3 Chat: 38.8 (#140)

| Benchmark | Deepseek Coder v2 | GPT-5.3 Chat |
|---|---|---|
| LMArena Expert | 1181 | 1397 |
| ARC (AI2) Challenge | 64.3% | — |

## Multilingual

- Deepseek Coder v2: 36.3 (#240)
- GPT-5.3 Chat: 50.3 (#124)

| Benchmark | Deepseek Coder v2 | GPT-5.3 Chat |
|---|---|---|
| LMArena Non-English | 1182 | 1382 |
| LMArena Chinese | 1201 | 1432 |
| LMArena French | 1185 | 1397 |
| LMArena German | 1164 | 1384 |
| LMArena Japanese | 1126 | 1352 |
| LMArena Korean | 1104 | 1346 |
| LMArena Russian | 1188 | 1400 |
| LMArena Spanish | 1153 | 1371 |

## Instruction Following

- Deepseek Coder v2: 61.7 (#242)
- GPT-5.3 Chat: 72.8 (#129)

| Benchmark | Deepseek Coder v2 | GPT-5.3 Chat |
|---|---|---|
| LMArena Instruction Following | 1180 | 1378 |

## Long Context

- Deepseek Coder v2: 37.0 (#224)
- GPT-5.3 Chat: 42.6 (#120)

| Benchmark | Deepseek Coder v2 | GPT-5.3 Chat |
|---|---|---|
| LMArena Longer Query | 1219 | 1396 |

## Writing & Preference

- Deepseek Coder v2: 38.2 (#253)
- GPT-5.3 Chat: 63.1 (#68)

| Benchmark | Deepseek Coder v2 | GPT-5.3 Chat |
|---|---|---|
| LMArena Text | 1191 | 1389 |
| LMArena Creative Writing | 1120 | 1355 |
| LMArena Multi-Turn | 1177 | 1412 |
| EQ-Bench Creative Writing | — | 1690 |

## FAQ

### Is Deepseek Coder v2 better than GPT-5.3 Chat?

GPT-5.3 Chat is the stronger model overall, scoring 42.8 to 35.9 on the Noometry Index.

### Is Deepseek Coder v2 or GPT-5.3 Chat better for coding?

GPT-5.3 Chat scores higher on coding benchmarks: 41.4 versus 38.1 in the Noometry coding category.

### How many benchmarks do Deepseek Coder v2 and GPT-5.3 Chat share?

17 benchmarks have published results for both models. Deepseek Coder v2 has 24 scored results on Noometry and GPT-5.3 Chat has 18.