Model comparison
Claude Opus 4.1 vs Phi 3 Small 8k Instruct
Claude Opus 4.1 is the stronger model overall, scoring 41.0 to 29.3 on the Noometry Index.
Last verified . 17 shared benchmarks.
MicrosoftSummary
- They share 17 benchmarks with published results for both. Claude Opus 4.1 scores higher in 7 categories and Phi 3 Small 8k Instruct in 1 category; 8 gaps are clear of the uncertainty.
- The widest gap is in writing & preference, where Claude Opus 4.1 leads 62.4 to 31.1.
- Phi 3 Small 8k Instruct has downloadable open weights; the other is API-only.
Side by side
| Claude Opus 4.1 | Phi 3 Small 8k Instruct | |
|---|---|---|
| Provider | Anthropic | Microsoft |
| Noometry Index | 41.0 | 29.3 |
| Released | 2025-08-05 | 2024-04-23 |
| Weights | Proprietary | Open |
| Context window | 200K | — |
| Max output | 32K | — |
| Input $ / M tokens | $15 | — |
| Output $ / M tokens | $75 | — |
| Results tracked | 48 | 32 |
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Category by category
Coding Claude Opus 4.1 leads
Claude Opus 4.1: 44.4 (#73), Phi 3 Small 8k Instruct: 27.9 (#318)
| Benchmark | Claude Opus 4.1 | Phi 3 Small 8k Instruct |
|---|---|---|
| LMArena Coding | 1479 | 1101 |
| SWE-bench Verified | 73.3% | — |
| LMArena WebDev | 1390 | — |
| WeirdML | 45.9% | — |
| LiveBench Coding | — | 20.3% |
| ALE-Bench | 674.77 | — |
| AlgoTune | 1.34 | — |
Agentic & Tool Use Not comparable
Claude Opus 4.1: 35.0 (#41), Phi 3 Small 8k Instruct: —
| Benchmark | Claude Opus 4.1 | Phi 3 Small 8k Instruct |
|---|---|---|
| Terminal-Bench | 38% | — |
| GDPval | 43.6% | — |
| Cybench | 42% | — |
| DeepResearch Bench | 48.3% | — |
| LMArena Search | 1148 | — |
| METR Time Horizons | 66.8% | — |
Reasoning Claude Opus 4.1 leads
Claude Opus 4.1: 32.2 (#76), Phi 3 Small 8k Instruct: 14.8 (#323)
| Benchmark | Claude Opus 4.1 | Phi 3 Small 8k Instruct |
|---|---|---|
| LMArena Hard Prompts | 1443 | 1100 |
| SimpleBench | 60% | — |
| Chess Puzzles | 7% | — |
| EnigmaEval | 7.2% | — |
| EBR-Bench | 7.9% | — |
| LiveBench Reasoning | — | 15.9% |
| Mystery Game Puzzles | 21% | — |
| DTBench | 80% | — |
| LiveBench Data Analysis | — | 30.3% |
| LMCA | 37.1% | — |
| Adversarial NLI | — | 58.1% |
| BIG-Bench Hard | — | 79.1% |
| Epoch Capabilities Index | 144.12 | — |
| ForecastBench | 62 | — |
| HellaSwag | — | 77% |
| LiveBench | — | 24% |
| WinoGrande | — | 81.5% |
Math Phi 3 Small 8k Instruct leads
Claude Opus 4.1: 22.3 (#277), Phi 3 Small 8k Instruct: 27.6 (#248)
| Benchmark | Claude Opus 4.1 | Phi 3 Small 8k Instruct |
|---|---|---|
| LMArena Math | 1431 | 1151 |
| FrontierMath (Tiers 1-3) | 12.6% | — |
| FrontierMath Tier 4 | 2.4% | — |
| OTIS Mock AIME 2024-2025 | 68.9% | — |
| LiveBench Math | — | 17.6% |
| FrontierMath (Feb 2025 set) | 7.2% | — |
| FrontierMath Tier 4 (v1) | 4.2% | — |
Knowledge Claude Opus 4.1 leads
Claude Opus 4.1: 42.0 (#101), Phi 3 Small 8k Instruct: 29.1 (#240)
| Benchmark | Claude Opus 4.1 | Phi 3 Small 8k Instruct |
|---|---|---|
| LMArena Expert | 1439 | 1067 |
| GPQA Diamond | 77.3% | — |
| Humanity's Last Exam | 11.5% | — |
| Confabulations | 17.1% | — |
| Vectara Hallucination Rate | 11.8% | — |
| ARC (AI2) Challenge | — | 90.7% |
| MMLU | — | 75.7% |
| OpenBookQA | — | 88% |
| TriviaQA | — | 58.1% |
Multimodal Not comparable
Claude Opus 4.1: 26.8 (#119), Phi 3 Small 8k Instruct: —
| Benchmark | Claude Opus 4.1 | Phi 3 Small 8k Instruct |
|---|---|---|
| VPCT | 35% | — |
Multilingual Claude Opus 4.1 leads
Claude Opus 4.1: 52.0 (#95), Phi 3 Small 8k Instruct: 28.5 (#272)
| Benchmark | Claude Opus 4.1 | Phi 3 Small 8k Instruct |
|---|---|---|
| LMArena Non-English | 1405 | 1058 |
| LMArena Chinese | 1427 | 1061 |
| LMArena French | 1431 | 1135 |
| LMArena German | 1413 | 1080 |
| LMArena Japanese | 1378 | 966 |
| LMArena Korean | 1380 | 894 |
| LMArena Russian | 1422 | 1111 |
| LMArena Spanish | 1448 | 1111 |
Instruction Following Claude Opus 4.1 leads
Claude Opus 4.1: 75.6 (#58), Phi 3 Small 8k Instruct: 51.9 (#292)
| Benchmark | Claude Opus 4.1 | Phi 3 Small 8k Instruct |
|---|---|---|
| LMArena Instruction Following | 1435 | 1087 |
| LiveBench Instruction Following | — | 47.2% |
Long Context Claude Opus 4.1 leads
Claude Opus 4.1: 44.5 (#63), Phi 3 Small 8k Instruct: 33.0 (#267)
| Benchmark | Claude Opus 4.1 | Phi 3 Small 8k Instruct |
|---|---|---|
| LMArena Longer Query | 1455 | 1088 |
Writing & Preference Claude Opus 4.1 leads
Claude Opus 4.1: 62.4 (#74), Phi 3 Small 8k Instruct: 31.1 (#284)
| Benchmark | Claude Opus 4.1 | Phi 3 Small 8k Instruct |
|---|---|---|
| LMArena Text | 1419 | 1110 |
| LMArena Creative Writing | 1412 | 1083 |
| LMArena Multi-Turn | 1444 | 1068 |
| Short-Story Creative Writing | 84.7% | — |
| LiveBench Language | — | 12.9% |
Frequently asked questions
Is Claude Opus 4.1 better than Phi 3 Small 8k Instruct?
Claude Opus 4.1 is the stronger model overall, scoring 41.0 to 29.3 on the Noometry Index.
Is Claude Opus 4.1 or Phi 3 Small 8k Instruct better for coding?
Claude Opus 4.1 scores higher on coding benchmarks: 44.4 versus 27.9 in the Noometry coding category.
How many benchmarks do Claude Opus 4.1 and Phi 3 Small 8k Instruct share?
17 benchmarks have published results for both models. Claude Opus 4.1 has 48 scored results on Noometry and Phi 3 Small 8k Instruct has 32.