# Claude 3 Opus vs Phi 3 Small 8k Instruct

> Claude 3 Opus and Phi 3 Small 8k Instruct score almost the same on the Noometry Index (29.5 vs 29.3), so choose on price, context window or the category you care about most.

- Canonical page: https://noometry.com/compare/claude-3-opus-vs-phi-3-small-8k-instruct
- Last updated: 2026-10-10
- Shared benchmarks: 26

## Summary

- They share 26 benchmarks with published results for both. Claude 3 Opus scores higher in 5 categories and Phi 3 Small 8k Instruct in 3 categories; 7 gaps are clear of the uncertainty.
- The widest gap is in writing & preference, where Claude 3 Opus leads 47.2 to 31.1.
- The biggest single-benchmark swing is LiveBench Language: 50.4% for Claude 3 Opus and 12.9% for Phi 3 Small 8k Instruct.
- Phi 3 Small 8k Instruct has downloadable open weights; the other is API-only.

## Snapshot

| | Claude 3 Opus | Phi 3 Small 8k Instruct |
|---|---|---|
| Provider | Anthropic | Microsoft |
| Noometry Index | 29.5 | 29.3 |
| Rank | 310 | 314 |
| Context | — | — |
| Input $/M | — | — |
| Output $/M | — | — |
| Weights | Proprietary | Open |

## Coding

- Claude 3 Opus: 32.9 (#267)
- Phi 3 Small 8k Instruct: 27.9 (#318)

| Benchmark | Claude 3 Opus | Phi 3 Small 8k Instruct |
|---|---|---|
| LiveBench Coding | 38.6% | 20.3% |
| LMArena Coding | 1264 | 1101 |
| WeirdML | 19.2% | — |
| BigCodeBench Instruct | 45.5% | — |
| BigCodeBench Complete | 57.4% | — |
| HumanEval+ | 77.4% | — |
| MBPP+ | 73.3% | — |

## Agentic & Tool Use

- Claude 3 Opus: 24.6 (#116)
- Phi 3 Small 8k Instruct: —

| Benchmark | Claude 3 Opus | Phi 3 Small 8k Instruct |
|---|---|---|
| Cybench | 10% | — |
| METR Time Horizons | 29.5% | — |

## Reasoning

- Claude 3 Opus: 14.6 (#324)
- Phi 3 Small 8k Instruct: 14.8 (#323)

| Benchmark | Claude 3 Opus | Phi 3 Small 8k Instruct |
|---|---|---|
| LiveBench Reasoning | 40.6% | 15.9% |
| LMArena Hard Prompts | 1245 | 1100 |
| LiveBench Data Analysis | 57.9% | 30.3% |
| LiveBench | 49.2% | 24% |
| WinoGrande | 88.5% | 81.5% |
| SimpleBench | 23.5% | — |
| Chess Puzzles | 5% | — |
| EnigmaEval | 0.8% | — |
| DTBench | 61.6% | — |
| LMCA | 17% | — |
| Adversarial NLI | — | 58.1% |
| BIG-Bench Hard | — | 79.1% |
| Epoch Capabilities Index | 126.91 | — |
| ForecastBench | 58.4 | — |
| HellaSwag | — | 77% |

## Math

- Claude 3 Opus: 14.8 (#299)
- Phi 3 Small 8k Instruct: 27.6 (#248)

| Benchmark | Claude 3 Opus | Phi 3 Small 8k Instruct |
|---|---|---|
| LiveBench Math | 43.6% | 17.6% |
| LMArena Math | 1273 | 1151 |
| OTIS Mock AIME 2024-2025 | 4.7% | — |
| MATH Level 5 | 37.5% | — |

## Knowledge

- Claude 3 Opus: 24.5 (#267)
- Phi 3 Small 8k Instruct: 29.1 (#240)

| Benchmark | Claude 3 Opus | Phi 3 Small 8k Instruct |
|---|---|---|
| LMArena Expert | 1223 | 1067 |
| MMLU | 84.6% | 75.7% |
| GPQA Diamond | 47.2% | — |
| SimpleQA Verified | 12.6% | — |
| Confabulations | 22.7% | — |
| ARC (AI2) Challenge | — | 90.7% |
| OpenBookQA | — | 88% |
| TriviaQA | — | 58.1% |

## Multimodal

- Claude 3 Opus: 27.1 (#116)
- Phi 3 Small 8k Instruct: —

| Benchmark | Claude 3 Opus | Phi 3 Small 8k Instruct |
|---|---|---|
| LMArena Vision | 1023 | — |

## Multilingual

- Claude 3 Opus: 41.4 (#207)
- Phi 3 Small 8k Instruct: 28.5 (#272)

| Benchmark | Claude 3 Opus | Phi 3 Small 8k Instruct |
|---|---|---|
| LMArena Non-English | 1258 | 1058 |
| LMArena Chinese | 1248 | 1061 |
| LMArena French | 1275 | 1135 |
| LMArena German | 1258 | 1080 |
| LMArena Japanese | 1204 | 966 |
| LMArena Korean | 1187 | 894 |
| LMArena Russian | 1280 | 1111 |
| LMArena Spanish | 1246 | 1111 |

## Instruction Following

- Claude 3 Opus: 64.1 (#228)
- Phi 3 Small 8k Instruct: 51.9 (#292)

| Benchmark | Claude 3 Opus | Phi 3 Small 8k Instruct |
|---|---|---|
| LiveBench Instruction Following | 63.9% | 47.2% |
| LMArena Instruction Following | 1248 | 1087 |

## Long Context

- Claude 3 Opus: 38.2 (#202)
- Phi 3 Small 8k Instruct: 33.0 (#267)

| Benchmark | Claude 3 Opus | Phi 3 Small 8k Instruct |
|---|---|---|
| LMArena Longer Query | 1259 | 1088 |

## Writing & Preference

- Claude 3 Opus: 47.2 (#213)
- Phi 3 Small 8k Instruct: 31.1 (#284)

| Benchmark | Claude 3 Opus | Phi 3 Small 8k Instruct |
|---|---|---|
| LMArena Text | 1262 | 1110 |
| LMArena Creative Writing | 1235 | 1083 |
| LMArena Multi-Turn | 1275 | 1068 |
| LiveBench Language | 50.4% | 12.9% |

## FAQ

### Is Claude 3 Opus better than Phi 3 Small 8k Instruct?

Claude 3 Opus and Phi 3 Small 8k Instruct score almost the same on the Noometry Index (29.5 vs 29.3), so choose on price, context window or the category you care about most.

### Is Claude 3 Opus or Phi 3 Small 8k Instruct better for coding?

Claude 3 Opus scores higher on coding benchmarks: 32.9 versus 27.9 in the Noometry coding category.

### How many benchmarks do Claude 3 Opus and Phi 3 Small 8k Instruct share?

26 benchmarks have published results for both models. Claude 3 Opus has 46 scored results on Noometry and Phi 3 Small 8k Instruct has 32.