Model comparison
Claude 3 Opus vs Claude Opus 4.5
Claude Opus 4.5 is the stronger model overall, scoring 50.5 to 29.5 on the Noometry Index.
Last verified . 30 shared benchmarks.
Summary
- They share 30 benchmarks with published results for both. Claude 3 Opus scores higher in 0 categories and Claude Opus 4.5 in 10 categories; 10 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where Claude Opus 4.5 leads 56.5 to 24.5.
- The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 4.7% for Claude 3 Opus and 86.1% for Claude Opus 4.5.
Side by side
| Claude 3 Opus | Claude Opus 4.5 | |
|---|---|---|
| Provider | Anthropic | Anthropic |
| Noometry Index | 29.5 | 50.5 |
| Released | 2024-02-29 | 2025-11-01 |
| Weights | Proprietary | Proprietary |
| Context window | — | 200K |
| Max output | — | 64K |
| Input $ / M tokens | — | $5 |
| Output $ / M tokens | — | $25 |
| Results tracked | 46 | 69 |
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Category by category
Coding Claude Opus 4.5 leads
Claude 3 Opus: 32.9 (#267), Claude Opus 4.5: 54.8 (#27)
| Benchmark | Claude 3 Opus | Claude Opus 4.5 |
|---|---|---|
| WeirdML | 19.2% | 63.7% |
| LMArena Coding | 1264 | 1504 |
| SWE-bench Verified | — | 76.7% |
| SWE-bench Verified (bash only) | — | 76.8% |
| LMArena WebDev | — | 1494 |
| SWE-bench Multilingual | — | 70.7% |
| GSO | — | 26.5% |
| BigCodeBench Instruct | 45.5% | — |
| LiveBench Coding | 38.6% | — |
| BigCodeBench Complete | 57.4% | — |
| ALE-Bench | — | 1,025 |
| AlgoTune | — | 1.77 |
| HumanEval+ | 77.4% | — |
| MBPP+ | 73.3% | — |
Agentic & Tool Use Claude Opus 4.5 leads
Claude 3 Opus: 24.6 (#116), Claude Opus 4.5: 47.3 (#12)
| Benchmark | Claude 3 Opus | Claude Opus 4.5 |
|---|---|---|
| Cybench | 10% | 82% |
| METR Time Horizons | 29.5% | 75% |
| Terminal-Bench | — | 63.1% |
| Berkeley Function Calling Leaderboard | — | 77.5% |
| GDPval | — | 45.5% |
| Remote Labor Index | — | 3.8% |
| τ²-bench Airline | — | 84% |
| τ²-bench Banking | — | 24.7% |
| τ²-bench Retail | — | 79.6% |
| τ²-bench Telecom | — | 92.3% |
| DeepResearch Bench | — | 54.8% |
| OSWorld | — | 66.3% |
| BALROG | — | 43.5% |
| LMArena Search | — | 1180 |
| Vending-Bench 2 | — | 4,967 |
Reasoning Claude Opus 4.5 leads
Claude 3 Opus: 14.6 (#324), Claude Opus 4.5: 42.6 (#51)
| Benchmark | Claude 3 Opus | Claude Opus 4.5 |
|---|---|---|
| SimpleBench | 23.5% | 62% |
| Chess Puzzles | 5% | 12% |
| EnigmaEval | 0.8% | 11.9% |
| LMArena Hard Prompts | 1245 | 1476 |
| DTBench | 61.6% | 89.9% |
| LMCA | 17% | 44.5% |
| Epoch Capabilities Index | 126.91 | 150.09 |
| ForecastBench | 58.4 | 60.7 |
| ARC-AGI-2 | — | 37.6% |
| Kagi LLM Benchmark | — | 80.2% |
| NYT Connections (extended) | — | 52.5% |
| ARC-AGI-1 | — | 80% |
| EBR-Bench | — | 14.3% |
| LiveBench Reasoning | 40.6% | — |
| Mystery Game Puzzles | — | 22% |
| LiveBench Data Analysis | 57.9% | — |
| LiveBench | 49.2% | — |
| WinoGrande | 88.5% | — |
Math Claude Opus 4.5 leads
Claude 3 Opus: 14.8 (#299), Claude Opus 4.5: 38.6 (#132)
| Benchmark | Claude 3 Opus | Claude Opus 4.5 |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 4.7% | 86.1% |
| LMArena Math | 1273 | 1463 |
| FrontierMath (Tiers 1-3) | — | 34.4% |
| FrontierMath Tier 4 | — | 4.9% |
| ProofBench | — | 36% |
| LiveBench Math | 43.6% | — |
| MATH Level 5 | 37.5% | — |
| FrontierMath (Feb 2025 set) | — | 20.7% |
| FrontierMath Tier 4 (v1) | — | 4.2% |
Knowledge Claude Opus 4.5 leads
Claude 3 Opus: 24.5 (#267), Claude Opus 4.5: 56.5 (#44)
| Benchmark | Claude 3 Opus | Claude Opus 4.5 |
|---|---|---|
| GPQA Diamond | 47.2% | 86% |
| SimpleQA Verified | 12.6% | 45.7% |
| LMArena Expert | 1223 | 1487 |
| Humanity's Last Exam | — | 25.2% |
| Confabulations | 22.7% | — |
| Vectara Hallucination Rate | — | 10.9% |
| MMLU | 84.6% | — |
Multimodal Claude Opus 4.5 leads
Claude 3 Opus: 27.1 (#116), Claude Opus 4.5: 31.4 (#107)
| Benchmark | Claude 3 Opus | Claude Opus 4.5 |
|---|---|---|
| LMArena Vision | 1023 | — |
| GeoBench | — | 75% |
| VPCT | — | 40% |
| Furniture Assembly | — | 28.3% |
| LMArena Document | — | 1462 |
Multilingual Claude Opus 4.5 leads
Claude 3 Opus: 41.4 (#207), Claude Opus 4.5: 54.3 (#47)
| Benchmark | Claude 3 Opus | Claude Opus 4.5 |
|---|---|---|
| LMArena Non-English | 1258 | 1438 |
| LMArena Chinese | 1248 | 1470 |
| LMArena French | 1275 | 1471 |
| LMArena German | 1258 | 1449 |
| LMArena Japanese | 1204 | 1416 |
| LMArena Korean | 1187 | 1424 |
| LMArena Russian | 1280 | 1447 |
| LMArena Spanish | 1246 | 1458 |
Instruction Following Claude Opus 4.5 leads
Claude 3 Opus: 64.1 (#228), Claude Opus 4.5: 77.5 (#19)
| Benchmark | Claude 3 Opus | Claude Opus 4.5 |
|---|---|---|
| LMArena Instruction Following | 1248 | 1478 |
| LiveBench Instruction Following | 63.9% | — |
Long Context Claude Opus 4.5 leads
Claude 3 Opus: 38.2 (#202), Claude Opus 4.5: 46.5 (#22)
| Benchmark | Claude 3 Opus | Claude Opus 4.5 |
|---|---|---|
| LMArena Longer Query | 1259 | 1480 |
| CL-bench | — | 21.1% |
Writing & Preference Claude Opus 4.5 leads
Claude 3 Opus: 47.2 (#213), Claude Opus 4.5: 68.1 (#28)
| Benchmark | Claude 3 Opus | Claude Opus 4.5 |
|---|---|---|
| LMArena Text | 1262 | 1451 |
| LMArena Creative Writing | 1235 | 1445 |
| LMArena Multi-Turn | 1275 | 1466 |
| EQ-Bench Creative Writing | — | 1687 |
| LiveBench Language | 50.4% | — |
Frequently asked questions
Is Claude 3 Opus better than Claude Opus 4.5?
Claude Opus 4.5 is the stronger model overall, scoring 50.5 to 29.5 on the Noometry Index.
Is Claude 3 Opus or Claude Opus 4.5 better for coding?
Claude Opus 4.5 scores higher on coding benchmarks: 54.8 versus 32.9 in the Noometry coding category.
How many benchmarks do Claude 3 Opus and Claude Opus 4.5 share?
30 benchmarks have published results for both models. Claude 3 Opus has 46 scored results on Noometry and Claude Opus 4.5 has 69.