Model comparison
Claude 3 Opus vs o3-pro
o3-pro is the stronger model overall, scoring 42.9 to 29.5 on the Noometry Index.
Last verified . 5 shared benchmarks.
Summary
- They share 5 benchmarks with published results for both. Claude 3 Opus scores higher in 0 categories and o3-pro in 5 categories; 5 gaps are clear of the uncertainty.
- The widest gap is in long context, where o3-pro leads 72.2 to 38.2.
- The biggest single-benchmark swing is WeirdML: 19.2% for Claude 3 Opus and 58.2% for o3-pro.
Side by side
| Claude 3 Opus | o3-pro | |
|---|---|---|
| Provider | Anthropic | OpenAI |
| Noometry Index | 29.5 | 42.9 |
| Released | 2024-02-29 | 2025-06-10 |
| Weights | Proprietary | Proprietary |
| Context window | — | 200K |
| Max output | — | 100K |
| Input $ / M tokens | — | $20 |
| Output $ / M tokens | — | $80 |
| Results tracked | 46 | 12 |
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Category by category
Coding o3-pro leads
Claude 3 Opus: 32.9 (#267), o3-pro: 55.5 (#24)
| Benchmark | Claude 3 Opus | o3-pro |
|---|---|---|
| WeirdML | 19.2% | 58.2% |
| Aider Polyglot | — | 84.9% |
| BigCodeBench Instruct | 45.5% | — |
| LiveBench Coding | 38.6% | — |
| LMArena Coding | 1264 | — |
| BigCodeBench Complete | 57.4% | — |
| HumanEval+ | 77.4% | — |
| MBPP+ | 73.3% | — |
Agentic & Tool Use Not comparable
Claude 3 Opus: 24.6 (#116), o3-pro: —
| Benchmark | Claude 3 Opus | o3-pro |
|---|---|---|
| Cybench | 10% | — |
| METR Time Horizons | 29.5% | — |
Reasoning o3-pro leads
Claude 3 Opus: 14.6 (#324), o3-pro: 23.8 (#171)
| Benchmark | Claude 3 Opus | o3-pro |
|---|---|---|
| DTBench | 61.6% | 86.9% |
| LMCA | 17% | 38.5% |
| Epoch Capabilities Index | 126.91 | 147.42 |
| ARC-AGI-2 | — | 4.9% |
| SimpleBench | 23.5% | — |
| Kagi LLM Benchmark | — | 72.1% |
| ARC-AGI-1 | — | 59.3% |
| Chess Puzzles | 5% | — |
| EnigmaEval | 0.8% | — |
| LiveBench Reasoning | 40.6% | — |
| LMArena Hard Prompts | 1245 | — |
| LiveBench Data Analysis | 57.9% | — |
| ForecastBench | 58.4 | — |
| LiveBench | 49.2% | — |
| WinoGrande | 88.5% | — |
Math Not comparable
Claude 3 Opus: 14.8 (#299), o3-pro: —
| Benchmark | Claude 3 Opus | o3-pro |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 4.7% | — |
| LiveBench Math | 43.6% | — |
| LMArena Math | 1273 | — |
| MATH Level 5 | 37.5% | — |
Knowledge o3-pro leads
Claude 3 Opus: 24.5 (#267), o3-pro: 29.5 (#238)
| Benchmark | Claude 3 Opus | o3-pro |
|---|---|---|
| Confabulations | 22.7% | 14.2% |
| GPQA Diamond | 47.2% | — |
| SimpleQA Verified | 12.6% | — |
| Vectara Hallucination Rate | — | 23.3% |
| LMArena Expert | 1223 | — |
| MMLU | 84.6% | — |
Multimodal Not comparable
Claude 3 Opus: 27.1 (#116), o3-pro: —
| Benchmark | Claude 3 Opus | o3-pro |
|---|---|---|
| LMArena Vision | 1023 | — |
Multilingual Not comparable
Claude 3 Opus: 41.4 (#207), o3-pro: —
| Benchmark | Claude 3 Opus | o3-pro |
|---|---|---|
| LMArena Non-English | 1258 | — |
| LMArena Chinese | 1248 | — |
| LMArena French | 1275 | — |
| LMArena German | 1258 | — |
| LMArena Japanese | 1204 | — |
| LMArena Korean | 1187 | — |
| LMArena Russian | 1280 | — |
| LMArena Spanish | 1246 | — |
Instruction Following Not comparable
Claude 3 Opus: 64.1 (#228), o3-pro: —
| Benchmark | Claude 3 Opus | o3-pro |
|---|---|---|
| LiveBench Instruction Following | 63.9% | — |
| LMArena Instruction Following | 1248 | — |
Long Context o3-pro leads
Claude 3 Opus: 38.2 (#202), o3-pro: 72.2 (#1)
| Benchmark | Claude 3 Opus | o3-pro |
|---|---|---|
| Fiction.LiveBench | — | 97.2% |
| LMArena Longer Query | 1259 | — |
Writing & Preference o3-pro leads
Claude 3 Opus: 47.2 (#213), o3-pro: 57.1 (#133)
| Benchmark | Claude 3 Opus | o3-pro |
|---|---|---|
| LMArena Text | 1262 | — |
| LMArena Creative Writing | 1235 | — |
| Short-Story Creative Writing | — | 84.4% |
| LMArena Multi-Turn | 1275 | — |
| LiveBench Language | 50.4% | — |
Frequently asked questions
Is Claude 3 Opus better than o3-pro?
o3-pro is the stronger model overall, scoring 42.9 to 29.5 on the Noometry Index.
Is Claude 3 Opus or o3-pro better for coding?
o3-pro scores higher on coding benchmarks: 55.5 versus 32.9 in the Noometry coding category.
How many benchmarks do Claude 3 Opus and o3-pro share?
5 benchmarks have published results for both models. Claude 3 Opus has 46 scored results on Noometry and o3-pro has 12.