Model comparison
Claude Sonnet 5.5 vs Phi-2
Claude Sonnet 5.5 has enough public results to be ranked (#10); Phi-2 does not yet, so treat this comparison as directional.
Last verified . 1 shared benchmarks.
MicrosoftSummary
- They share 1 benchmark with published results for both.
- Phi-2 has downloadable open weights; the other is API-only.
Side by side
| Claude Sonnet 5.5 | Phi-2 | |
|---|---|---|
| Provider | Anthropic | Microsoft |
| Noometry Index | 61.9 | — |
| Released | 2026-09-28 | 2023-12-12 |
| Weights | Proprietary | Open |
| Context window | 1M | — |
| Max output | 128K | — |
| Input $ / M tokens | $2 | — |
| Output $ / M tokens | $10 | — |
| Results tracked | 32 | 11 |
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Category by category
Coding Not comparable
Claude Sonnet 5.5: 67.3 (#6), Phi-2: —
| Benchmark | Claude Sonnet 5.5 | Phi-2 |
|---|---|---|
| FrontierCode | 52.1% | — |
| CursorBench | 55.5% | — |
| LMArena WebDev | 1774 | — |
| FrontierSWE | 61.9% | — |
| SciCode | 61% | — |
| LMArena Coding | 1513 | — |
| ALE-Bench | 1,819 | — |
| HumanEval+ | — | 45.1% |
| MBPP+ | — | 54.2% |
Agentic & Tool Use Not comparable
Claude Sonnet 5.5: 45.0 (#16), Phi-2: —
| Benchmark | Claude Sonnet 5.5 | Phi-2 |
|---|---|---|
| APEX-Agents | 75.5% | — |
Reasoning Not comparable
Claude Sonnet 5.5: 54.0 (#28), Phi-2: —
| Benchmark | Claude Sonnet 5.5 | Phi-2 |
|---|---|---|
| Epoch Capabilities Index | 165.03 | 107.94 |
| NYT Connections (extended) | 80.5% | — |
| CritPt | 31.4% | — |
| LMArena Hard Prompts | 1495 | — |
| Mystery Game Puzzles | 65% | — |
| Adversarial NLI | — | 42.5% |
| BIG-Bench Hard | — | 59.4% |
| HellaSwag | — | 53.6% |
| WinoGrande | — | 54.7% |
Math Not comparable
Claude Sonnet 5.5: 87.9 (#6), Phi-2: —
| Benchmark | Claude Sonnet 5.5 | Phi-2 |
|---|---|---|
| FrontierMath (Tiers 1-3) | 88.8% | — |
| FrontierMath Tier 4 | 80.5% | — |
| OTIS Mock AIME 2024-2025 | 100% | — |
| ProofBench | 100% | — |
| LMArena Math | 1510 | — |
| FrontierMath Erdős | 2.9% | — |
Knowledge Not comparable
Claude Sonnet 5.5: 66.0 (#12), Phi-2: —
| Benchmark | Claude Sonnet 5.5 | Phi-2 |
|---|---|---|
| GPQA Diamond | 95.6% | — |
| SimpleQA Verified | 46.5% | — |
| LMArena Expert | 1540 | — |
| ARC (AI2) Challenge | — | 75.9% |
| MMLU | — | 58.4% |
| OpenBookQA | — | 73.6% |
| TriviaQA | — | 45.2% |
Multimodal Not comparable
Claude Sonnet 5.5: 51.5 (#6), Phi-2: —
| Benchmark | Claude Sonnet 5.5 | Phi-2 |
|---|---|---|
| LMArena Vision | 1289 | — |
| Furniture Assembly | 75% | — |
Multilingual Not comparable
Claude Sonnet 5.5: 55.3 (#30), Phi-2: —
| Benchmark | Claude Sonnet 5.5 | Phi-2 |
|---|---|---|
| LMArena Non-English | 1452 | — |
| LMArena Chinese | 1522 | — |
| LMArena Russian | 1451 | — |
Instruction Following Not comparable
Claude Sonnet 5.5: 78.3 (#11), Phi-2: —
| Benchmark | Claude Sonnet 5.5 | Phi-2 |
|---|---|---|
| LMArena Instruction Following | 1495 | — |
Long Context Not comparable
Claude Sonnet 5.5: 45.9 (#28), Phi-2: —
| Benchmark | Claude Sonnet 5.5 | Phi-2 |
|---|---|---|
| LMArena Longer Query | 1498 | — |
Writing & Preference Not comparable
Claude Sonnet 5.5: 66.0 (#40), Phi-2: —
| Benchmark | Claude Sonnet 5.5 | Phi-2 |
|---|---|---|
| LMArena Text | 1471 | — |
| LMArena Creative Writing | 1465 | — |
| LMArena Multi-Turn | 1474 | — |
Frequently asked questions
Is Claude Sonnet 5.5 better than Phi-2?
Claude Sonnet 5.5 has enough public results to be ranked (#10); Phi-2 does not yet, so treat this comparison as directional.
How many benchmarks do Claude Sonnet 5.5 and Phi-2 share?
1 benchmark has published results for both models. Claude Sonnet 5.5 has 32 scored results on Noometry and Phi-2 has 11.