# Claude Opus 4.5 vs Phi-2

> Claude Opus 4.5 has enough public results to be ranked (#47); Phi-2 does not yet, so treat this comparison as directional.

- Canonical page: https://noometry.com/compare/claude-opus-4-5-vs-phi-2
- Last updated: 2026-10-11
- Shared benchmarks: 1

## Summary

- They share 1 benchmark with published results for both.
- Phi-2 has downloadable open weights; the other is API-only.

## Snapshot

| | Claude Opus 4.5 | Phi-2 |
|---|---|---|
| Provider | Anthropic | Microsoft |
| Noometry Index | 50.5 | — |
| Rank | 47 | — |
| Context | 200K | — |
| Input $/M | $5 | — |
| Output $/M | $25 | — |
| Weights | Proprietary | Open |

## Coding

- Claude Opus 4.5: 54.8 (#27)
- Phi-2: —

| Benchmark | Claude Opus 4.5 | Phi-2 |
|---|---|---|
| SWE-bench Verified | 76.7% | — |
| SWE-bench Verified (bash only) | 76.8% | — |
| LMArena WebDev | 1494 | — |
| SWE-bench Multilingual | 70.7% | — |
| GSO | 26.5% | — |
| WeirdML | 63.7% | — |
| LMArena Coding | 1504 | — |
| ALE-Bench | 1,025 | — |
| AlgoTune | 1.77 | — |
| HumanEval+ | — | 45.1% |
| MBPP+ | — | 54.2% |

## Agentic & Tool Use

- Claude Opus 4.5: 47.3 (#12)
- Phi-2: —

| Benchmark | Claude Opus 4.5 | Phi-2 |
|---|---|---|
| Terminal-Bench | 63.1% | — |
| Berkeley Function Calling Leaderboard | 77.5% | — |
| GDPval | 45.5% | — |
| Remote Labor Index | 3.8% | — |
| τ²-bench Airline | 84% | — |
| τ²-bench Banking | 24.7% | — |
| τ²-bench Retail | 79.6% | — |
| τ²-bench Telecom | 92.3% | — |
| Cybench | 82% | — |
| DeepResearch Bench | 54.8% | — |
| OSWorld | 66.3% | — |
| BALROG | 43.5% | — |
| LMArena Search | 1180 | — |
| METR Time Horizons | 75% | — |
| Vending-Bench 2 | 4,967 | — |

## Reasoning

- Claude Opus 4.5: 42.6 (#51)
- Phi-2: —

| Benchmark | Claude Opus 4.5 | Phi-2 |
|---|---|---|
| Epoch Capabilities Index | 150.09 | 107.94 |
| ARC-AGI-2 | 37.6% | — |
| SimpleBench | 62% | — |
| Kagi LLM Benchmark | 80.2% | — |
| NYT Connections (extended) | 52.5% | — |
| ARC-AGI-1 | 80% | — |
| Chess Puzzles | 12% | — |
| EnigmaEval | 11.9% | — |
| EBR-Bench | 14.3% | — |
| LMArena Hard Prompts | 1476 | — |
| Mystery Game Puzzles | 22% | — |
| DTBench | 89.9% | — |
| LMCA | 44.5% | — |
| Adversarial NLI | — | 42.5% |
| BIG-Bench Hard | — | 59.4% |
| ForecastBench | 60.7 | — |
| HellaSwag | — | 53.6% |
| WinoGrande | — | 54.7% |

## Math

- Claude Opus 4.5: 38.6 (#132)
- Phi-2: —

| Benchmark | Claude Opus 4.5 | Phi-2 |
|---|---|---|
| FrontierMath (Tiers 1-3) | 34.4% | — |
| FrontierMath Tier 4 | 4.9% | — |
| OTIS Mock AIME 2024-2025 | 86.1% | — |
| ProofBench | 36% | — |
| LMArena Math | 1463 | — |
| FrontierMath (Feb 2025 set) | 20.7% | — |
| FrontierMath Tier 4 (v1) | 4.2% | — |

## Knowledge

- Claude Opus 4.5: 56.5 (#44)
- Phi-2: —

| Benchmark | Claude Opus 4.5 | Phi-2 |
|---|---|---|
| GPQA Diamond | 86% | — |
| Humanity's Last Exam | 25.2% | — |
| SimpleQA Verified | 45.7% | — |
| Vectara Hallucination Rate | 10.9% | — |
| LMArena Expert | 1487 | — |
| ARC (AI2) Challenge | — | 75.9% |
| MMLU | — | 58.4% |
| OpenBookQA | — | 73.6% |
| TriviaQA | — | 45.2% |

## Multimodal

- Claude Opus 4.5: 31.4 (#107)
- Phi-2: —

| Benchmark | Claude Opus 4.5 | Phi-2 |
|---|---|---|
| GeoBench | 75% | — |
| VPCT | 40% | — |
| Furniture Assembly | 28.3% | — |
| LMArena Document | 1462 | — |

## Multilingual

- Claude Opus 4.5: 54.3 (#47)
- Phi-2: —

| Benchmark | Claude Opus 4.5 | Phi-2 |
|---|---|---|
| LMArena Non-English | 1438 | — |
| LMArena Chinese | 1470 | — |
| LMArena French | 1471 | — |
| LMArena German | 1449 | — |
| LMArena Japanese | 1416 | — |
| LMArena Korean | 1424 | — |
| LMArena Russian | 1447 | — |
| LMArena Spanish | 1458 | — |

## Instruction Following

- Claude Opus 4.5: 77.5 (#19)
- Phi-2: —

| Benchmark | Claude Opus 4.5 | Phi-2 |
|---|---|---|
| LMArena Instruction Following | 1478 | — |

## Long Context

- Claude Opus 4.5: 46.5 (#22)
- Phi-2: —

| Benchmark | Claude Opus 4.5 | Phi-2 |
|---|---|---|
| CL-bench | 21.1% | — |
| LMArena Longer Query | 1480 | — |

## Writing & Preference

- Claude Opus 4.5: 68.1 (#28)
- Phi-2: —

| Benchmark | Claude Opus 4.5 | Phi-2 |
|---|---|---|
| LMArena Text | 1451 | — |
| LMArena Creative Writing | 1445 | — |
| EQ-Bench Creative Writing | 1687 | — |
| LMArena Multi-Turn | 1466 | — |

## FAQ

### Is Claude Opus 4.5 better than Phi-2?

Claude Opus 4.5 has enough public results to be ranked (#47); Phi-2 does not yet, so treat this comparison as directional.

### How many benchmarks do Claude Opus 4.5 and Phi-2 share?

1 benchmark has published results for both models. Claude Opus 4.5 has 69 scored results on Noometry and Phi-2 has 11.