Model comparison
Claude Sonnet 5.5 vs Phi-1.5
Claude Sonnet 5.5 has enough public results to be ranked (#10); Phi-1.5 does not yet, so treat this comparison as directional.
Last verified . 0 shared benchmarks.
MicrosoftSummary
- Phi-1.5 has downloadable open weights; the other is API-only.
Side by side
| Claude Sonnet 5.5 | Phi-1.5 | |
|---|---|---|
| Provider | Anthropic | Microsoft |
| Noometry Index | 60.5 | — |
| Released | 2026-09-28 | 2023-09-11 |
| Weights | Proprietary | Open |
| Context window | 1M | — |
| Max output | 128K | — |
| Input $ / M tokens | $2 | — |
| Output $ / M tokens | $10 | — |
| Results tracked | 16 | 7 |
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Category by category
Coding Not comparable
Claude Sonnet 5.5: 65.5 (#6), Phi-1.5: —
| Benchmark | Claude Sonnet 5.5 | Phi-1.5 |
|---|---|---|
| FrontierCode | 52.1% | — |
| CursorBench | 55.5% | — |
| LMArena WebDev | 1699 | — |
| FrontierSWE | 61.9% | — |
| SciCode | 61% | — |
| ALE-Bench | 1,819 | — |
Agentic & Tool Use Not comparable
Claude Sonnet 5.5: 44.9 (#14), Phi-1.5: —
| Benchmark | Claude Sonnet 5.5 | Phi-1.5 |
|---|---|---|
| APEX-Agents | 75.5% | — |
Reasoning Not comparable
Claude Sonnet 5.5: 52.4 (#29), Phi-1.5: —
| Benchmark | Claude Sonnet 5.5 | Phi-1.5 |
|---|---|---|
| CritPt | 31.4% | — |
| Mystery Game Puzzles | 65% | — |
| Epoch Capabilities Index | — | 90.82 |
| HellaSwag | — | 47.6% |
| WinoGrande | — | 73.4% |
Math Not comparable
Claude Sonnet 5.5: 88.7 (#4), Phi-1.5: —
| Benchmark | Claude Sonnet 5.5 | Phi-1.5 |
|---|---|---|
| FrontierMath (Tiers 1-3) | 88.8% | — |
| FrontierMath Tier 4 | 80.5% | — |
| OTIS Mock AIME 2024-2025 | 100% | — |
| ProofBench | 100% | — |
Knowledge Not comparable
Claude Sonnet 5.5: 66.0 (#11), Phi-1.5: —
| Benchmark | Claude Sonnet 5.5 | Phi-1.5 |
|---|---|---|
| GPQA Diamond | 95.6% | — |
| SimpleQA Verified | 46.5% | — |
| ARC (AI2) Challenge | — | 44.4% |
| BoolQ | — | 75.8% |
| MMLU | — | 37.6% |
| OpenBookQA | — | 37.2% |
Multimodal Not comparable
Claude Sonnet 5.5: 53.2 (#5), Phi-1.5: —
| Benchmark | Claude Sonnet 5.5 | Phi-1.5 |
|---|---|---|
| Furniture Assembly | 75% | — |
Frequently asked questions
Is Claude Sonnet 5.5 better than Phi-1.5?
Claude Sonnet 5.5 has enough public results to be ranked (#10); Phi-1.5 does not yet, so treat this comparison as directional.
How many benchmarks do Claude Sonnet 5.5 and Phi-1.5 share?
0 benchmarks have published results for both models. Claude Sonnet 5.5 has 16 scored results on Noometry and Phi-1.5 has 7.