# Claude Opus 4.5 vs o1-pro

> Claude Opus 4.5 is the stronger model overall, scoring 50.5 to 31.2 on the Noometry Index.

- Canonical page: https://noometry.com/compare/claude-opus-4-5-vs-o1-pro
- Last updated: 2026-10-10
- Shared benchmarks: 3

## Summary

- They share 3 benchmarks with published results for both. Claude Opus 4.5 scores higher in 2 categories and o1-pro in 0 categories; 2 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where Claude Opus 4.5 leads 56.4 to 29.3.
- The biggest single-benchmark swing is ARC-AGI-1: 80% for Claude Opus 4.5 and 23.3% for o1-pro.
- Claude Opus 4.5 is cheaper at $5 / $25 per million input/output tokens, against $150 / $600 for o1-pro.

## Snapshot

| | Claude Opus 4.5 | o1-pro |
|---|---|---|
| Provider | Anthropic | OpenAI |
| Noometry Index | 50.5 | 31.2 |
| Rank | 39 | 264 |
| Context | 200K | 200K |
| Input $/M | $5 | $150 |
| Output $/M | $25 | $600 |
| Weights | Proprietary | Proprietary |

## Coding

- Claude Opus 4.5: 55.4 (#21)
- o1-pro: —

| Benchmark | Claude Opus 4.5 | o1-pro |
|---|---|---|
| SWE-bench Verified | 76.7% | — |
| SWE-bench Verified (bash only) | 76.8% | — |
| LMArena WebDev | 1493 | — |
| SWE-bench Multilingual | 70.7% | — |
| GSO | 26.5% | — |
| WeirdML | 63.7% | — |
| LMArena Coding | 1504 | — |
| ALE-Bench | 1,025 | — |
| AlgoTune | 1.77 | — |

## Agentic & Tool Use

- Claude Opus 4.5: 47.2 (#11)
- o1-pro: —

| Benchmark | Claude Opus 4.5 | o1-pro |
|---|---|---|
| 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% | — |
| Cybench | 82% | — |
| DeepResearch Bench | 54.8% | — |
| OSWorld | 66.3% | — |
| BALROG | 43.5% | — |
| LMArena Search | 1180 | — |
| METR Time Horizons | 75% | — |
| Vending-Bench 2 | 4,967 | — |

## Reasoning

- Claude Opus 4.5: 42.5 (#43)
- o1-pro: 20.2 (#223)

| Benchmark | Claude Opus 4.5 | o1-pro |
|---|---|---|
| ARC-AGI-1 | 80% | 23.3% |
| EnigmaEval | 11.9% | 6.1% |
| ARC-AGI-2 | 37.6% | — |
| SimpleBench | 62% | — |
| Kagi LLM Benchmark | 80.2% | — |
| NYT Connections (extended) | 52.5% | — |
| Chess Puzzles | 12% | — |
| EBR-Bench | 14.3% | — |
| LMArena Hard Prompts | 1476 | — |
| Mystery Game Puzzles | 22% | — |
| DTBench | 89.9% | — |
| LMCA | 44.5% | — |
| Epoch Capabilities Index | 150.1 | — |
| ForecastBench | 60.7 | — |

## Math

- Claude Opus 4.5: 38.5 (#85)
- o1-pro: —

| Benchmark | Claude Opus 4.5 | o1-pro |
|---|---|---|
| FrontierMath (Tiers 1-3) | 34.4% | — |
| FrontierMath Tier 4 | 4.9% | — |
| OTIS Mock AIME 2024-2025 | 86.1% | — |
| ProofBench | 36% | — |
| LMArena Math | 1463 | — |
| FrontierMath (Feb 2025 set) | 20.7% | — |
| FrontierMath Tier 4 (v1) | 4.2% | — |

## Knowledge

- Claude Opus 4.5: 56.4 (#38)
- o1-pro: 29.3 (#227)

| Benchmark | Claude Opus 4.5 | o1-pro |
|---|---|---|
| Humanity's Last Exam | 25.2% | 8.1% |
| GPQA Diamond | 86% | — |
| SimpleQA Verified | 45.7% | — |
| Vectara Hallucination Rate | 10.9% | — |
| LMArena Expert | 1488 | — |

## Multimodal

- Claude Opus 4.5: 31.1 (#99)
- o1-pro: —

| Benchmark | Claude Opus 4.5 | o1-pro |
|---|---|---|
| GeoBench | 75% | — |
| VPCT | 40% | — |
| Furniture Assembly | 28.3% | — |
| LMArena Document | 1462 | — |

## Multilingual

- Claude Opus 4.5: 54.5 (#45)
- o1-pro: —

| Benchmark | Claude Opus 4.5 | o1-pro |
|---|---|---|
| LMArena Non-English | 1438 | — |
| LMArena Chinese | 1470 | — |
| LMArena French | 1471 | — |
| LMArena German | 1449 | — |
| LMArena Japanese | 1415 | — |
| LMArena Korean | 1424 | — |
| LMArena Russian | 1448 | — |
| LMArena Spanish | 1455 | — |

## Instruction Following

- Claude Opus 4.5: 77.7 (#20)
- o1-pro: —

| Benchmark | Claude Opus 4.5 | o1-pro |
|---|---|---|
| LMArena Instruction Following | 1478 | — |

## Long Context

- Claude Opus 4.5: 46.4 (#21)
- o1-pro: —

| Benchmark | Claude Opus 4.5 | o1-pro |
|---|---|---|
| CL-bench | 21.1% | — |
| LMArena Longer Query | 1480 | — |

## Writing & Preference

- Claude Opus 4.5: 68.2 (#28)
- o1-pro: —

| Benchmark | Claude Opus 4.5 | o1-pro |
|---|---|---|
| LMArena Text | 1451 | — |
| LMArena Creative Writing | 1445 | — |
| EQ-Bench Creative Writing | 1687 | — |
| LMArena Multi-Turn | 1466 | — |

## FAQ

### Is Claude Opus 4.5 better than o1-pro?

Claude Opus 4.5 is the stronger model overall, scoring 50.5 to 31.2 on the Noometry Index.

### Which is cheaper, Claude Opus 4.5 or o1-pro?

Claude Opus 4.5 is cheaper. It lists at $5 per million input tokens and $25 per million output tokens; o1-pro lists at $150 and $600.

### Which has the bigger context window?

Both accept 200K tokens.

### How many benchmarks do Claude Opus 4.5 and o1-pro share?

3 benchmarks have published results for both models. Claude Opus 4.5 has 69 scored results on Noometry and o1-pro has 3.