Model comparison
Claude 2.1 vs Claude 3.5 Sonnet
Claude 3.5 Sonnet is the stronger model overall, scoring 34.6 to 25.2 on the Noometry Index.
Last verified . 7 shared benchmarks.
Summary
- They share 7 benchmarks with published results for both. Claude 2.1 scores higher in 0 categories and Claude 3.5 Sonnet in 4 categories; 4 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where Claude 3.5 Sonnet leads 28.6 to 15.4.
- The biggest single-benchmark swing is WeirdML: 7.1% for Claude 2.1 and 40% for Claude 3.5 Sonnet.
Side by side
| Claude 2.1 | Claude 3.5 Sonnet | |
|---|---|---|
| Provider | Anthropic | Anthropic |
| Noometry Index | 25.2 | 34.6 |
| Released | 2023-11-21 | 2024-06-20 |
| Weights | Proprietary | Proprietary |
| Context window | — | — |
| Max output | — | — |
| Input $ / M tokens | — | — |
| Output $ / M tokens | — | — |
| Results tracked | 7 | 60 |
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Category by category
Coding Claude 3.5 Sonnet leads
Claude 2.1: 26.2 (#327), Claude 3.5 Sonnet: 39.0 (#165)
| Benchmark | Claude 2.1 | Claude 3.5 Sonnet |
|---|---|---|
| WeirdML | 7.1% | 40% |
| Aider Polyglot | — | 51.6% |
| GSO | — | 4.6% |
| BigCodeBench Instruct | — | 46.8% |
| LiveBench Coding | — | 67.1% |
| LMArena Coding | — | 1342 |
| BigCodeBench Complete | — | 58.6% |
| CadEval | — | 48% |
| HumanEval+ | — | 81.7% |
| MBPP+ | — | 74.3% |
Agentic & Tool Use Not comparable
Claude 2.1: —, Claude 3.5 Sonnet: 32.3 (#67)
| Benchmark | Claude 2.1 | Claude 3.5 Sonnet |
|---|---|---|
| TheAgentCompany | — | 24% |
| Cybench | — | 17.5% |
| BALROG | — | 32.6% |
| METR Time Horizons | — | 45.2% |
Reasoning Claude 3.5 Sonnet leads
Claude 2.1: 21.4 (#221), Claude 3.5 Sonnet: 23.1 (#183)
| Benchmark | Claude 2.1 | Claude 3.5 Sonnet |
|---|---|---|
| DTBench | 51% | 67.8% |
| Epoch Capabilities Index | 119.27 | 133.55 |
| ForecastBench | 54.2 | 60.7 |
| SimpleBench | — | 41.4% |
| EnigmaEval | — | 0.9% |
| LiveBench Reasoning | — | 56.7% |
| LMArena Hard Prompts | — | 1305 |
| LiveBench Data Analysis | — | 55% |
| LiveBench | — | 59% |
Math Claude 3.5 Sonnet leads
Claude 2.1: 10.2 (#315), Claude 3.5 Sonnet: 19.2 (#288)
| Benchmark | Claude 2.1 | Claude 3.5 Sonnet |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 1.9% | 8.5% |
| Omni-MATH | — | 27.6% |
| LiveBench Math | — | 52.3% |
| LMArena Math | — | 1307 |
| MATH Level 5 | — | 56.9% |
| FrontierMath (Feb 2025 set) | — | 2.1% |
| FrontierMath Tier 4 (v1) | — | 0% |
Knowledge Claude 3.5 Sonnet leads
Claude 2.1: 15.4 (#292), Claude 3.5 Sonnet: 28.6 (#245)
| Benchmark | Claude 2.1 | Claude 3.5 Sonnet |
|---|---|---|
| GPQA Diamond | 33% | 55.3% |
| MMLU | 73.5% | 87.3% |
| Humanity's Last Exam | — | 4.1% |
| MMLU-Pro | — | 77.7% |
| Confabulations | — | 19.9% |
| GPQA (HELM) | — | 56.5% |
| LMArena Expert | — | 1265 |
Multimodal Not comparable
Claude 2.1: —, Claude 3.5 Sonnet: 26.5 (#120)
| Benchmark | Claude 2.1 | Claude 3.5 Sonnet |
|---|---|---|
| LMArena Vision | — | 1125 |
| Video-MME | — | 60% |
| GeoBench | — | 62% |
| VPCT | — | 33% |
Multilingual Not comparable
Claude 2.1: —, Claude 3.5 Sonnet: 43.2 (#185)
| Benchmark | Claude 2.1 | Claude 3.5 Sonnet |
|---|---|---|
| LMArena Non-English | — | 1283 |
| LMArena Chinese | — | 1272 |
| LMArena French | — | 1305 |
| LMArena German | — | 1297 |
| LMArena Japanese | — | 1234 |
| LMArena Korean | — | 1200 |
| LMArena Russian | — | 1306 |
| LMArena Spanish | — | 1290 |
Instruction Following Not comparable
Claude 2.1: —, Claude 3.5 Sonnet: 68.8 (#182)
| Benchmark | Claude 2.1 | Claude 3.5 Sonnet |
|---|---|---|
| LiveBench Instruction Following | — | 69.3% |
| IFEval | — | 85.5% |
| LMArena Instruction Following | — | 1297 |
Long Context Not comparable
Claude 2.1: —, Claude 3.5 Sonnet: 39.9 (#167)
| Benchmark | Claude 2.1 | Claude 3.5 Sonnet |
|---|---|---|
| LMArena Longer Query | — | 1311 |
Writing & Preference Not comparable
Claude 2.1: —, Claude 3.5 Sonnet: 52.9 (#164)
| Benchmark | Claude 2.1 | Claude 3.5 Sonnet |
|---|---|---|
| LMArena Text | — | 1298 |
| LMArena Creative Writing | — | 1292 |
| Short-Story Creative Writing | — | 80.3% |
| EQ-Bench Creative Writing | — | 1451 |
| WildBench | — | 79.2% |
| LMArena Multi-Turn | — | 1326 |
| LiveBench Language | — | 53.8% |
Frequently asked questions
Is Claude 2.1 better than Claude 3.5 Sonnet?
Claude 3.5 Sonnet is the stronger model overall, scoring 34.6 to 25.2 on the Noometry Index.
Is Claude 2.1 or Claude 3.5 Sonnet better for coding?
Claude 3.5 Sonnet scores higher on coding benchmarks: 39.0 versus 26.2 in the Noometry coding category.
How many benchmarks do Claude 2.1 and Claude 3.5 Sonnet share?
7 benchmarks have published results for both models. Claude 2.1 has 7 scored results on Noometry and Claude 3.5 Sonnet has 60.