Model comparison
Claude Opus 4 vs o3-pro
Claude Opus 4 and o3-pro score almost the same on the Noometry Index (43.1 vs 42.9), so choose on price, context window or the category you care about most.
Last verified . 12 shared benchmarks.
Summary
- They share 12 benchmarks with published results for both. Claude Opus 4 scores higher in 3 categories and o3-pro in 2 categories; 5 gaps are clear of the uncertainty.
- The widest gap is in long context, where o3-pro leads 72.2 to 39.6.
- The biggest single-benchmark swing is Fiction.LiveBench: 61.1% for Claude Opus 4 and 97.2% for o3-pro.
- Claude Opus 4 is cheaper at $15 / $75 per million input/output tokens, against $20 / $80 for o3-pro.
Side by side
| Claude Opus 4 | o3-pro | |
|---|---|---|
| Provider | Anthropic | OpenAI |
| Noometry Index | 43.1 | 42.9 |
| Released | 2025-05-22 | 2025-06-10 |
| Weights | Proprietary | Proprietary |
| Context window | 200K | 200K |
| Max output | 32K | 100K |
| Input $ / M tokens | $15 | $20 |
| Output $ / M tokens | $75 | $80 |
| Results tracked | 56 | 12 |
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Category by category
Coding o3-pro leads
Claude Opus 4: 47.2 (#62), o3-pro: 55.5 (#24)
| Benchmark | Claude Opus 4 | o3-pro |
|---|---|---|
| Aider Polyglot | 72% | 84.9% |
| WeirdML | 43.7% | 58.2% |
| SWE-bench Verified | 70.7% | — |
| SWE-bench Verified (bash only) | 67.6% | — |
| GSO | 6.9% | — |
| LMArena Coding | 1442 | — |
| AlgoTune | 1.33 | — |
Agentic & Tool Use Not comparable
Claude Opus 4: 34.8 (#42), o3-pro: —
| Benchmark | Claude Opus 4 | o3-pro |
|---|---|---|
| Cybench | 38% | — |
| DeepResearch Bench | 46.8% | — |
| LMArena Search | 1127 | — |
| METR Time Horizons | 63.9% | — |
Reasoning Claude Opus 4 leads
Claude Opus 4: 27.3 (#121), o3-pro: 23.8 (#171)
| Benchmark | Claude Opus 4 | o3-pro |
|---|---|---|
| ARC-AGI-2 | 8.6% | 4.9% |
| Kagi LLM Benchmark | 74.3% | 72.1% |
| ARC-AGI-1 | 35.7% | 59.3% |
| DTBench | 81.6% | 86.9% |
| LMCA | 37.4% | 38.5% |
| Epoch Capabilities Index | 142.67 | 147.42 |
| SimpleBench | 58.8% | — |
| CritPt | 0.3% | — |
| EnigmaEval | 5.6% | — |
| LMArena Hard Prompts | 1399 | — |
| ForecastBench | 61.1 | — |
Math Not comparable
Claude Opus 4: 42.0 (#86), o3-pro: —
| Benchmark | Claude Opus 4 | o3-pro |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 64.4% | — |
| Omni-MATH | 61.6% | — |
| LMArena Math | 1390 | — |
| MATH Level 5 | 85% | — |
| FrontierMath (Feb 2025 set) | 4.5% | — |
| FrontierMath Tier 4 (v1) | 4.2% | — |
Knowledge Claude Opus 4 leads
Claude Opus 4: 44.0 (#88), o3-pro: 29.5 (#238)
| Benchmark | Claude Opus 4 | o3-pro |
|---|---|---|
| Confabulations | 15.9% | 14.2% |
| Vectara Hallucination Rate | 12% | 23.3% |
| GPQA Diamond | 76.3% | — |
| Humanity's Last Exam | 10.7% | — |
| MMLU-Pro | 87.5% | — |
| GPQA (HELM) | 70.8% | — |
| LMArena Expert | 1386 | — |
Multimodal Not comparable
Claude Opus 4: 31.5 (#106), o3-pro: —
| Benchmark | Claude Opus 4 | o3-pro |
|---|---|---|
| LMArena Vision | 1192 | — |
| GeoBench | 49% | — |
| VPCT | 38% | — |
Multilingual Not comparable
Claude Opus 4: 48.8 (#138), o3-pro: —
| Benchmark | Claude Opus 4 | o3-pro |
|---|---|---|
| LMArena Non-English | 1362 | — |
| LMArena Chinese | 1386 | — |
| LMArena French | 1372 | — |
| LMArena German | 1391 | — |
| LMArena Japanese | 1331 | — |
| LMArena Korean | 1321 | — |
| LMArena Russian | 1392 | — |
| LMArena Spanish | 1389 | — |
Instruction Following Not comparable
Claude Opus 4: 77.1 (#28), o3-pro: —
| Benchmark | Claude Opus 4 | o3-pro |
|---|---|---|
| IFEval | 91.8% | — |
| LMArena Instruction Following | 1406 | — |
Long Context o3-pro leads
Claude Opus 4: 39.6 (#172), o3-pro: 72.2 (#1)
| Benchmark | Claude Opus 4 | o3-pro |
|---|---|---|
| Fiction.LiveBench | 61.1% | 97.2% |
| LMArena Longer Query | 1422 | — |
Writing & Preference Claude Opus 4 leads
Claude Opus 4: 61.2 (#89), o3-pro: 57.1 (#133)
| Benchmark | Claude Opus 4 | o3-pro |
|---|---|---|
| Short-Story Creative Writing | 83.6% | 84.4% |
| LMArena Text | 1377 | — |
| LMArena Creative Writing | 1387 | — |
| EQ-Bench Creative Writing | 1580 | — |
| WildBench | 85.2% | — |
| LMArena Multi-Turn | 1396 | — |
Frequently asked questions
Is Claude Opus 4 better than o3-pro?
Claude Opus 4 and o3-pro score almost the same on the Noometry Index (43.1 vs 42.9), so choose on price, context window or the category you care about most.
Which is cheaper, Claude Opus 4 or o3-pro?
Claude Opus 4 is cheaper. It lists at $15 per million input tokens and $75 per million output tokens; o3-pro lists at $20 and $80.
Is Claude Opus 4 or o3-pro better for coding?
o3-pro scores higher on coding benchmarks: 55.5 versus 47.2 in the Noometry coding category.
Which has the bigger context window?
Both accept 200K tokens.
How many benchmarks do Claude Opus 4 and o3-pro share?
12 benchmarks have published results for both models. Claude Opus 4 has 56 scored results on Noometry and o3-pro has 12.