# Claude 3 Sonnet vs DeepSeek Coder 1.3B

> Claude 3 Sonnet has enough public results to be ranked (#319); DeepSeek Coder 1.3B does not yet, so treat this comparison as directional.

- Canonical page: https://noometry.com/compare/claude-3-sonnet-vs-deepseek-coder-1-3b
- Last updated: 2026-10-11
- Shared benchmarks: 7

## Summary

- They share 7 benchmarks with published results for both. Claude 3 Sonnet scores higher in 0 categories and DeepSeek Coder 1.3B in 1 category; one gap is clear of the uncertainty.
- The biggest single-benchmark swing is BigCodeBench Complete: 53.8% for Claude 3 Sonnet and 29.6% for DeepSeek Coder 1.3B.
- DeepSeek Coder 1.3B has downloadable open weights; the other is API-only.

## Snapshot

| | Claude 3 Sonnet | DeepSeek Coder 1.3B |
|---|---|---|
| Provider | Anthropic | DeepSeek |
| Noometry Index | 29.0 | 35.0 |
| Rank | 319 | — |
| Context | — | — |
| Input $/M | — | — |
| Output $/M | — | — |
| Weights | Proprietary | Open |

## Coding

- Claude 3 Sonnet: 29.6 (#302)
- DeepSeek Coder 1.3B: 31.2 (#287)

| Benchmark | Claude 3 Sonnet | DeepSeek Coder 1.3B |
|---|---|---|
| BigCodeBench Instruct | 42.7% | 22.8% |
| BigCodeBench Complete | 53.8% | 29.6% |
| HumanEval+ | 64% | 60.4% |
| MBPP+ | 69.3% | 54.8% |
| WeirdML | 10.2% | — |
| LMArena Coding | 1223 | — |

## Reasoning

- Claude 3 Sonnet: 20.5 (#237)
- DeepSeek Coder 1.3B: —

| Benchmark | Claude 3 Sonnet | DeepSeek Coder 1.3B |
|---|---|---|
| Epoch Capabilities Index | 120.7 | 63.6 |
| WinoGrande | 75.1% | 53.3% |
| LMArena Hard Prompts | 1197 | — |
| DTBench | 53.6% | — |

## Math

- Claude 3 Sonnet: 10.7 (#310)
- DeepSeek Coder 1.3B: —

| Benchmark | Claude 3 Sonnet | DeepSeek Coder 1.3B |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 2.5% | — |
| LMArena Math | 1213 | — |
| MATH Level 5 | 18.2% | — |
| GSM8K | — | 4.4% |

## Knowledge

- Claude 3 Sonnet: 21.1 (#276)
- DeepSeek Coder 1.3B: —

| Benchmark | Claude 3 Sonnet | DeepSeek Coder 1.3B |
|---|---|---|
| MMLU | 75.9% | 25.8% |
| GPQA Diamond | 40.6% | — |
| LMArena Expert | 1173 | — |
| ARC (AI2) Challenge | — | 25.4% |

## Multimodal

- Claude 3 Sonnet: 25.2 (#125)
- DeepSeek Coder 1.3B: —

| Benchmark | Claude 3 Sonnet | DeepSeek Coder 1.3B |
|---|---|---|
| LMArena Vision | 984 | — |

## Multilingual

- Claude 3 Sonnet: 37.8 (#234)
- DeepSeek Coder 1.3B: —

| Benchmark | Claude 3 Sonnet | DeepSeek Coder 1.3B |
|---|---|---|
| LMArena Non-English | 1205 | — |
| LMArena Chinese | 1189 | — |
| LMArena French | 1229 | — |
| LMArena German | 1204 | — |
| LMArena Japanese | 1131 | — |
| LMArena Korean | 1128 | — |
| LMArena Russian | 1227 | — |
| LMArena Spanish | 1204 | — |

## Instruction Following

- Claude 3 Sonnet: 62.8 (#235)
- DeepSeek Coder 1.3B: —

| Benchmark | Claude 3 Sonnet | DeepSeek Coder 1.3B |
|---|---|---|
| LMArena Instruction Following | 1199 | — |

## Long Context

- Claude 3 Sonnet: 36.7 (#228)
- DeepSeek Coder 1.3B: —

| Benchmark | Claude 3 Sonnet | DeepSeek Coder 1.3B |
|---|---|---|
| LMArena Longer Query | 1211 | — |

## Writing & Preference

- Claude 3 Sonnet: 42.1 (#238)
- DeepSeek Coder 1.3B: —

| Benchmark | Claude 3 Sonnet | DeepSeek Coder 1.3B |
|---|---|---|
| LMArena Text | 1218 | — |
| LMArena Creative Writing | 1186 | — |
| LMArena Multi-Turn | 1227 | — |

## FAQ

### Is Claude 3 Sonnet better than DeepSeek Coder 1.3B?

Claude 3 Sonnet has enough public results to be ranked (#319); DeepSeek Coder 1.3B does not yet, so treat this comparison as directional.

### Is Claude 3 Sonnet or DeepSeek Coder 1.3B better for coding?

DeepSeek Coder 1.3B scores higher on coding benchmarks: 31.2 versus 29.6 in the Noometry coding category.

### How many benchmarks do Claude 3 Sonnet and DeepSeek Coder 1.3B share?

7 benchmarks have published results for both models. Claude 3 Sonnet has 30 scored results on Noometry and DeepSeek Coder 1.3B has 9.