Model comparison
Claude 3 Sonnet vs Claude Opus 4.1
Claude Opus 4.1 is the stronger model overall, scoring 40.8 to 28.8 on the Noometry Index.
Last verified . 22 shared benchmarks.
Summary
- They share 22 benchmarks with published results for both. Claude 3 Sonnet scores higher in 0 categories and Claude Opus 4.1 in 9 categories; 9 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where Claude Opus 4.1 leads 41.9 to 21.1.
- The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 2.5% for Claude 3 Sonnet and 68.9% for Claude Opus 4.1.
Side by side
| Claude 3 Sonnet | Claude Opus 4.1 | |
|---|---|---|
| Provider | Anthropic | Anthropic |
| Noometry Index | 28.8 | 40.8 |
| Released | 2024-02-29 | 2025-08-05 |
| Weights | Proprietary | Proprietary |
| Context window | — | 200K |
| Max output | — | 32K |
| Input $ / M tokens | — | $15 |
| Output $ / M tokens | — | $75 |
| Results tracked | 30 | 48 |
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Category by category
Coding Claude Opus 4.1 leads
Claude 3 Sonnet: 29.2 (#296), Claude Opus 4.1: 44.3 (#69)
| Benchmark | Claude 3 Sonnet | Claude Opus 4.1 |
|---|---|---|
| WeirdML | 10.2% | 45.9% |
| LMArena Coding | 1223 | 1479 |
| SWE-bench Verified | — | 73.3% |
| LMArena WebDev | — | 1390 |
| BigCodeBench Instruct | 42.7% | — |
| BigCodeBench Complete | 53.8% | — |
| ALE-Bench | — | 674.77 |
| AlgoTune | — | 1.34 |
| HumanEval+ | 64% | — |
| MBPP+ | 69.3% | — |
Agentic & Tool Use Not comparable
Claude 3 Sonnet: —, Claude Opus 4.1: 34.8 (#38)
| Benchmark | Claude 3 Sonnet | Claude Opus 4.1 |
|---|---|---|
| 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 3 Sonnet: 19.7 (#232), Claude Opus 4.1: 31.6 (#70)
| Benchmark | Claude 3 Sonnet | Claude Opus 4.1 |
|---|---|---|
| LMArena Hard Prompts | 1197 | 1443 |
| DTBench | 53.6% | 80% |
| Epoch Capabilities Index | 120.69 | 144.11 |
| SimpleBench | — | 60% |
| Chess Puzzles | — | 7% |
| EnigmaEval | — | 7.2% |
| EBR-Bench | — | 7.9% |
| Mystery Game Puzzles | — | 21% |
| LMCA | — | 37.1% |
| ForecastBench | — | 62 |
| WinoGrande | 75.1% | — |
Math Claude Opus 4.1 leads
Claude 3 Sonnet: 10.0 (#305), Claude Opus 4.1: 22.0 (#267)
| Benchmark | Claude 3 Sonnet | Claude Opus 4.1 |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 2.5% | 68.9% |
| LMArena Math | 1213 | 1430 |
| FrontierMath (Tiers 1-3) | — | 12.6% |
| FrontierMath Tier 4 | — | 2.4% |
| MATH Level 5 | 18.2% | — |
| FrontierMath (Feb 2025 set) | — | 7.2% |
| FrontierMath Tier 4 (v1) | — | 4.2% |
Knowledge Claude Opus 4.1 leads
Claude 3 Sonnet: 21.1 (#271), Claude Opus 4.1: 41.9 (#93)
| Benchmark | Claude 3 Sonnet | Claude Opus 4.1 |
|---|---|---|
| GPQA Diamond | 40.6% | 77.3% |
| LMArena Expert | 1173 | 1439 |
| Humanity's Last Exam | — | 11.5% |
| Confabulations | — | 17.1% |
| Vectara Hallucination Rate | — | 11.8% |
| MMLU | 75.9% | — |
Multimodal Claude Opus 4.1 leads
Claude 3 Sonnet: 24.7 (#120), Claude Opus 4.1: 26.2 (#114)
| Benchmark | Claude 3 Sonnet | Claude Opus 4.1 |
|---|---|---|
| LMArena Vision | 984 | — |
| VPCT | — | 35% |
Multilingual Claude Opus 4.1 leads
Claude 3 Sonnet: 38.0 (#229), Claude Opus 4.1: 52.1 (#90)
| Benchmark | Claude 3 Sonnet | Claude Opus 4.1 |
|---|---|---|
| LMArena Non-English | 1205 | 1405 |
| LMArena Chinese | 1188 | 1427 |
| LMArena French | 1228 | 1432 |
| LMArena German | 1204 | 1412 |
| LMArena Japanese | 1131 | 1378 |
| LMArena Korean | 1128 | 1381 |
| LMArena Russian | 1227 | 1421 |
| LMArena Spanish | 1204 | 1448 |
Instruction Following Claude Opus 4.1 leads
Claude 3 Sonnet: 63.1 (#230), Claude Opus 4.1: 75.8 (#53)
| Benchmark | Claude 3 Sonnet | Claude Opus 4.1 |
|---|---|---|
| LMArena Instruction Following | 1200 | 1436 |
Long Context Claude Opus 4.1 leads
Claude 3 Sonnet: 36.7 (#223), Claude Opus 4.1: 44.5 (#60)
| Benchmark | Claude 3 Sonnet | Claude Opus 4.1 |
|---|---|---|
| LMArena Longer Query | 1211 | 1455 |
Writing & Preference Claude Opus 4.1 leads
Claude 3 Sonnet: 42.3 (#233), Claude Opus 4.1: 62.6 (#70)
| Benchmark | Claude 3 Sonnet | Claude Opus 4.1 |
|---|---|---|
| LMArena Text | 1218 | 1419 |
| LMArena Creative Writing | 1186 | 1412 |
| LMArena Multi-Turn | 1227 | 1444 |
| Short-Story Creative Writing | — | 84.7% |
Frequently asked questions
Is Claude 3 Sonnet better than Claude Opus 4.1?
Claude Opus 4.1 is the stronger model overall, scoring 40.8 to 28.8 on the Noometry Index.
Is Claude 3 Sonnet or Claude Opus 4.1 better for coding?
Claude Opus 4.1 scores higher on coding benchmarks: 44.3 versus 29.2 in the Noometry coding category.
How many benchmarks do Claude 3 Sonnet and Claude Opus 4.1 share?
22 benchmarks have published results for both models. Claude 3 Sonnet has 30 scored results on Noometry and Claude Opus 4.1 has 48.