# Claude 2.1 vs o1-mini

> o1-mini is the stronger model overall, scoring 34.0 to 25.2 on the Noometry Index.

- Canonical page: https://noometry.com/compare/claude-2-1-vs-o1-mini
- Last updated: 2026-10-11
- Shared benchmarks: 4

## Summary

- They share 4 benchmarks with published results for both. Claude 2.1 scores higher in 1 category and o1-mini in 3 categories; 4 gaps are clear of the uncertainty.
- The widest gap is in math, where o1-mini leads 35.4 to 10.2.
- The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 1.9% for Claude 2.1 and 46.9% for o1-mini.

## Snapshot

| | Claude 2.1 | o1-mini |
|---|---|---|
| Provider | Anthropic | OpenAI |
| Noometry Index | 25.2 | 34.0 |
| Rank | 345 | 235 |
| Context | — | — |
| Input $/M | — | — |
| Output $/M | — | — |
| Weights | Proprietary | Proprietary |

## Coding

- Claude 2.1: 26.2 (#327)
- o1-mini: 35.5 (#224)

| Benchmark | Claude 2.1 | o1-mini |
|---|---|---|
| WeirdML | 7.1% | 36.3% |
| Aider Polyglot | — | 32.9% |
| LiveBench Coding | — | 48% |
| LMArena Coding | — | 1362 |
| HumanEval+ | — | 89% |
| MBPP+ | — | 78.8% |

## Agentic & Tool Use

- Claude 2.1: —
- o1-mini: 24.6 (#118)

| Benchmark | Claude 2.1 | o1-mini |
|---|---|---|
| Cybench | — | 10% |

## Reasoning

- Claude 2.1: 21.4 (#221)
- o1-mini: 8.8 (#346)

| Benchmark | Claude 2.1 | o1-mini |
|---|---|---|
| Epoch Capabilities Index | 119.27 | 135.82 |
| ARC-AGI-2 | — | 0.8% |
| SimpleBench | — | 18.1% |
| ARC-AGI-1 | — | 14% |
| LiveBench Reasoning | — | 72.3% |
| LMArena Hard Prompts | — | 1333 |
| DTBench | 51% | — |
| LiveBench Data Analysis | — | 57.9% |
| ForecastBench | 54.2 | — |
| LiveBench | — | 57.8% |

## Math

- Claude 2.1: 10.2 (#315)
- o1-mini: 35.4 (#186)

| Benchmark | Claude 2.1 | o1-mini |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 1.9% | 46.9% |
| LiveBench Math | — | 62% |
| LMArena Math | — | 1358 |
| MATH Level 5 | — | 89.2% |
| FrontierMath (Feb 2025 set) | — | 1.7% |

## Knowledge

- Claude 2.1: 15.4 (#292)
- o1-mini: 34.9 (#192)

| Benchmark | Claude 2.1 | o1-mini |
|---|---|---|
| GPQA Diamond | 33% | 62.4% |
| Confabulations | — | 18.6% |
| LMArena Expert | — | 1316 |
| MMLU | 73.5% | — |

## Multilingual

- Claude 2.1: —
- o1-mini: 43.6 (#182)

| Benchmark | Claude 2.1 | o1-mini |
|---|---|---|
| LMArena Non-English | — | 1289 |
| LMArena Chinese | — | 1314 |
| LMArena French | — | 1293 |
| LMArena German | — | 1278 |
| LMArena Japanese | — | 1245 |
| LMArena Korean | — | 1223 |
| LMArena Russian | — | 1283 |
| LMArena Spanish | — | 1303 |

## Instruction Following

- Claude 2.1: —
- o1-mini: 66.7 (#206)

| Benchmark | Claude 2.1 | o1-mini |
|---|---|---|
| LiveBench Instruction Following | — | 65.4% |
| LMArena Instruction Following | — | 1304 |

## Long Context

- Claude 2.1: —
- o1-mini: 40.1 (#161)

| Benchmark | Claude 2.1 | o1-mini |
|---|---|---|
| LMArena Longer Query | — | 1320 |

## Writing & Preference

- Claude 2.1: —
- o1-mini: 48.4 (#202)

| Benchmark | Claude 2.1 | o1-mini |
|---|---|---|
| LMArena Text | — | 1317 |
| LMArena Creative Writing | — | 1244 |
| Short-Story Creative Writing | — | 64.9% |
| LMArena Multi-Turn | — | 1314 |
| LiveBench Language | — | 40.9% |

## FAQ

### Is Claude 2.1 better than o1-mini?

o1-mini is the stronger model overall, scoring 34.0 to 25.2 on the Noometry Index.

### Is Claude 2.1 or o1-mini better for coding?

o1-mini scores higher on coding benchmarks: 35.5 versus 26.2 in the Noometry coding category.

### How many benchmarks do Claude 2.1 and o1-mini share?

4 benchmarks have published results for both models. Claude 2.1 has 7 scored results on Noometry and o1-mini has 39.