Model comparison
Claude Sonnet 5 vs Phi 3 Small 8k Instruct
Claude Sonnet 5 is the stronger model overall, scoring 54.6 to 29.3 on the Noometry Index.
Last verified . 17 shared benchmarks.
MicrosoftSummary
- They share 17 benchmarks with published results for both. Claude Sonnet 5 scores higher in 8 categories and Phi 3 Small 8k Instruct in 0 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in math, where Claude Sonnet 5 leads 66.2 to 27.6.
- Phi 3 Small 8k Instruct has downloadable open weights; the other is API-only.
Side by side
| Claude Sonnet 5 | Phi 3 Small 8k Instruct | |
|---|---|---|
| Provider | Anthropic | Microsoft |
| Noometry Index | 54.6 | 29.3 |
| Released | 2026-06-29 | 2024-04-23 |
| Weights | Proprietary | Open |
| Context window | 1M | — |
| Max output | 128K | — |
| Input $ / M tokens | $2 | — |
| Output $ / M tokens | $10 | — |
| Results tracked | 51 | 32 |
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Category by category
Coding Claude Sonnet 5 leads
Claude Sonnet 5: 55.5 (#26), Phi 3 Small 8k Instruct: 27.9 (#318)
| Benchmark | Claude Sonnet 5 | Phi 3 Small 8k Instruct |
|---|---|---|
| LMArena Coding | 1483 | 1101 |
| DeepSWE | 53.8% | — |
| FrontierCode | 42.7% | — |
| CursorBench | 34.1% | — |
| LMArena WebDev | 1541 | — |
| SciCode | 54.3% | — |
| GSO | 37.3% | — |
| WeirdML | 68.8% | — |
| LiveBench Coding | — | 20.3% |
| ALE-Bench | 1,463 | — |
Agentic & Tool Use Not comparable
Claude Sonnet 5: 42.8 (#18), Phi 3 Small 8k Instruct: —
| Benchmark | Claude Sonnet 5 | Phi 3 Small 8k Instruct |
|---|---|---|
| APEX-Agents | 54.5% | — |
| GBAEval | 65.3% | — |
| LMArena Search | 1194 | — |
| Vending-Bench 2 | 6,378 | — |
Reasoning Claude Sonnet 5 leads
Claude Sonnet 5: 49.1 (#39), Phi 3 Small 8k Instruct: 14.8 (#323)
| Benchmark | Claude Sonnet 5 | Phi 3 Small 8k Instruct |
|---|---|---|
| LMArena Hard Prompts | 1461 | 1100 |
| SimpleBench | 60.6% | — |
| NYT Connections (extended) | 75.1% | — |
| CritPt | 16.9% | — |
| Chess Puzzles | 35% | — |
| LiveBench Reasoning | — | 15.9% |
| Mystery Game Puzzles | 35% | — |
| DTBench | 92.5% | — |
| LiveBench Data Analysis | — | 30.3% |
| LMCA | 50% | — |
| Surface Evolver Bench | 60% | — |
| Adversarial NLI | — | 58.1% |
| Bench to the Future 3 | 0.14 | — |
| BIG-Bench Hard | — | 79.1% |
| Epoch Capabilities Index | 156.21 | — |
| ForecastBench | 61.1 | — |
| HellaSwag | — | 77% |
| LiveBench | — | 24% |
| WinoGrande | — | 81.5% |
Math Claude Sonnet 5 leads
Claude Sonnet 5: 66.2 (#27), Phi 3 Small 8k Instruct: 27.6 (#248)
| Benchmark | Claude Sonnet 5 | Phi 3 Small 8k Instruct |
|---|---|---|
| LMArena Math | 1467 | 1151 |
| FrontierMath (Tiers 1-3) | 65.6% | — |
| FrontierMath Tier 4 | 29.3% | — |
| OTIS Mock AIME 2024-2025 | 94.7% | — |
| ProofBench | 77% | — |
| LiveBench Math | — | 17.6% |
Knowledge Claude Sonnet 5 leads
Claude Sonnet 5: 55.6 (#47), Phi 3 Small 8k Instruct: 29.1 (#240)
| Benchmark | Claude Sonnet 5 | Phi 3 Small 8k Instruct |
|---|---|---|
| LMArena Expert | 1490 | 1067 |
| GPQA Diamond | 90.5% | — |
| SimpleQA Verified | 33.7% | — |
| ARC (AI2) Challenge | — | 90.7% |
| MMLU | — | 75.7% |
| OpenBookQA | — | 88% |
| TriviaQA | — | 58.1% |
Multimodal Not comparable
Claude Sonnet 5: 42.4 (#31), Phi 3 Small 8k Instruct: —
| Benchmark | Claude Sonnet 5 | Phi 3 Small 8k Instruct |
|---|---|---|
| LMArena Vision | 1274 | — |
| Blueprint-Bench 2 | 24.9% | — |
| LMArena Document | 1466 | — |
Multilingual Claude Sonnet 5 leads
Claude Sonnet 5: 53.8 (#55), Phi 3 Small 8k Instruct: 28.5 (#272)
| Benchmark | Claude Sonnet 5 | Phi 3 Small 8k Instruct |
|---|---|---|
| LMArena Non-English | 1431 | 1058 |
| LMArena Chinese | 1477 | 1061 |
| LMArena French | 1460 | 1135 |
| LMArena German | 1440 | 1080 |
| LMArena Japanese | 1422 | 966 |
| LMArena Korean | 1411 | 894 |
| LMArena Russian | 1451 | 1111 |
| LMArena Spanish | 1437 | 1111 |
Instruction Following Claude Sonnet 5 leads
Claude Sonnet 5: 76.3 (#41), Phi 3 Small 8k Instruct: 51.9 (#292)
| Benchmark | Claude Sonnet 5 | Phi 3 Small 8k Instruct |
|---|---|---|
| LMArena Instruction Following | 1452 | 1087 |
| LiveBench Instruction Following | — | 47.2% |
Long Context Claude Sonnet 5 leads
Claude Sonnet 5: 44.8 (#55), Phi 3 Small 8k Instruct: 33.0 (#267)
| Benchmark | Claude Sonnet 5 | Phi 3 Small 8k Instruct |
|---|---|---|
| LMArena Longer Query | 1463 | 1088 |
Writing & Preference Claude Sonnet 5 leads
Claude Sonnet 5: 69.2 (#25), Phi 3 Small 8k Instruct: 31.1 (#284)
| Benchmark | Claude Sonnet 5 | Phi 3 Small 8k Instruct |
|---|---|---|
| LMArena Text | 1442 | 1110 |
| LMArena Creative Writing | 1416 | 1083 |
| LMArena Multi-Turn | 1454 | 1068 |
| EQ-Bench Creative Writing | 1794 | — |
| EQ-Bench 4 | 1236 | — |
| LiveBench Language | — | 12.9% |
Frequently asked questions
Is Claude Sonnet 5 better than Phi 3 Small 8k Instruct?
Claude Sonnet 5 is the stronger model overall, scoring 54.6 to 29.3 on the Noometry Index.
Is Claude Sonnet 5 or Phi 3 Small 8k Instruct better for coding?
Claude Sonnet 5 scores higher on coding benchmarks: 55.5 versus 27.9 in the Noometry coding category.
How many benchmarks do Claude Sonnet 5 and Phi 3 Small 8k Instruct share?
17 benchmarks have published results for both models. Claude Sonnet 5 has 51 scored results on Noometry and Phi 3 Small 8k Instruct has 32.