# Claude 2.1 vs Phi-2

> Claude 2.1 has enough public results to be ranked (#345); Phi-2 does not yet, so treat this comparison as directional.

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

## Summary

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

## Snapshot

| | Claude 2.1 | Phi-2 |
|---|---|---|
| Provider | Anthropic | Microsoft |
| Noometry Index | 25.2 | — |
| Rank | 345 | — |
| Context | — | — |
| Input $/M | — | — |
| Output $/M | — | — |
| Weights | Proprietary | Open |

## Coding

- Claude 2.1: 26.2 (#327)
- Phi-2: —

| Benchmark | Claude 2.1 | Phi-2 |
|---|---|---|
| WeirdML | 7.1% | — |
| HumanEval+ | — | 45.1% |
| MBPP+ | — | 54.2% |

## Reasoning

- Claude 2.1: 21.4 (#221)
- Phi-2: —

| Benchmark | Claude 2.1 | Phi-2 |
|---|---|---|
| Epoch Capabilities Index | 119.27 | 107.94 |
| DTBench | 51% | — |
| Adversarial NLI | — | 42.5% |
| BIG-Bench Hard | — | 59.4% |
| ForecastBench | 54.2 | — |
| HellaSwag | — | 53.6% |
| WinoGrande | — | 54.7% |

## Math

- Claude 2.1: 10.2 (#315)
- Phi-2: —

| Benchmark | Claude 2.1 | Phi-2 |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 1.9% | — |

## Knowledge

- Claude 2.1: 15.4 (#292)
- Phi-2: —

| Benchmark | Claude 2.1 | Phi-2 |
|---|---|---|
| MMLU | 73.5% | 58.4% |
| GPQA Diamond | 33% | — |
| ARC (AI2) Challenge | — | 75.9% |
| OpenBookQA | — | 73.6% |
| TriviaQA | — | 45.2% |

## FAQ

### Is Claude 2.1 better than Phi-2?

Claude 2.1 has enough public results to be ranked (#345); Phi-2 does not yet, so treat this comparison as directional.

### How many benchmarks do Claude 2.1 and Phi-2 share?

2 benchmarks have published results for both models. Claude 2.1 has 7 scored results on Noometry and Phi-2 has 11.