# Claude Opus 4.1 vs o4-mini

> Claude Opus 4.1 and o4-mini score almost the same on the Noometry Index (41.0 vs 41.6), so choose on price, context window or the category you care about most.

- Canonical page: https://noometry.com/compare/claude-opus-4-1-vs-o4-mini
- Last updated: 2026-10-10
- Shared benchmarks: 41

## Summary

- They share 41 benchmarks with published results for both. Claude Opus 4.1 scores higher in 6 categories and o4-mini in 4 categories; 9 gaps are clear of the uncertainty.
- The widest gap is in math, where o4-mini leads 40.8 to 22.3.
- The biggest single-benchmark swing is FrontierMath (Tiers 1-3): 12.6% for Claude Opus 4.1 and 36.1% for o4-mini.
- o4-mini is cheaper at $1.10 / $4.40 per million input/output tokens, against $15 / $75 for Claude Opus 4.1.

## Snapshot

| | Claude Opus 4.1 | o4-mini |
|---|---|---|
| Provider | Anthropic | OpenAI |
| Noometry Index | 41.0 | 41.6 |
| Rank | 142 | 132 |
| Context | 200K | 200K |
| Input $/M | $15 | $1.10 |
| Output $/M | $75 | $4.40 |
| Weights | Proprietary | Proprietary |

## Coding

- Claude Opus 4.1: 44.4 (#73)
- o4-mini: 40.9 (#127)

| Benchmark | Claude Opus 4.1 | o4-mini |
|---|---|---|
| WeirdML | 45.9% | 52.6% |
| LMArena Coding | 1479 | 1368 |
| ALE-Bench | 674.77 | 826.17 |
| AlgoTune | 1.34 | 1.72 |
| SWE-bench Verified | 73.3% | — |
| SWE-bench Verified (bash only) | — | 45% |
| Aider Polyglot | — | 72% |
| LMArena WebDev | 1390 | — |
| GSO | — | 3.6% |
| CadEval | — | 62% |

## Agentic & Tool Use

- Claude Opus 4.1: 35.0 (#41)
- o4-mini: 32.6 (#61)

| Benchmark | Claude Opus 4.1 | o4-mini |
|---|---|---|
| GDPval | 43.6% | 25.3% |
| METR Time Horizons | 66.8% | 63.9% |
| Terminal-Bench | 38% | — |
| Berkeley Function Calling Leaderboard | — | 53.2% |
| Cybench | 42% | — |
| DeepResearch Bench | 48.3% | — |
| LMArena Search | 1148 | — |

## Reasoning

- Claude Opus 4.1: 32.2 (#76)
- o4-mini: 24.6 (#162)

| Benchmark | Claude Opus 4.1 | o4-mini |
|---|---|---|
| SimpleBench | 60% | 38.7% |
| Chess Puzzles | 7% | 26% |
| EnigmaEval | 7.2% | 9.2% |
| LMArena Hard Prompts | 1443 | 1351 |
| Mystery Game Puzzles | 21% | 5% |
| DTBench | 80% | 77.6% |
| LMCA | 37.1% | 26.5% |
| Epoch Capabilities Index | 144.12 | 145.64 |
| ForecastBench | 62 | 61.8 |
| ARC-AGI-2 | — | 6.1% |
| Kagi LLM Benchmark | — | 67.6% |
| ARC-AGI-1 | — | 58.7% |
| CritPt | — | 0.6% |
| EBR-Bench | 7.9% | — |

## Math

- Claude Opus 4.1: 22.3 (#277)
- o4-mini: 40.8 (#89)

| Benchmark | Claude Opus 4.1 | o4-mini |
|---|---|---|
| FrontierMath (Tiers 1-3) | 12.6% | 36.1% |
| FrontierMath Tier 4 | 2.4% | 4.9% |
| OTIS Mock AIME 2024-2025 | 68.9% | 81.7% |
| LMArena Math | 1431 | 1389 |
| FrontierMath (Feb 2025 set) | 7.2% | 24.8% |
| FrontierMath Tier 4 (v1) | 4.2% | 6.3% |
| Omni-MATH | — | 72% |
| MATH Level 5 | — | 97.8% |

## Knowledge

- Claude Opus 4.1: 42.0 (#101)
- o4-mini: 43.6 (#91)

| Benchmark | Claude Opus 4.1 | o4-mini |
|---|---|---|
| GPQA Diamond | 77.3% | 79.6% |
| Humanity's Last Exam | 11.5% | 18.1% |
| Confabulations | 17.1% | 15.8% |
| Vectara Hallucination Rate | 11.8% | 18.6% |
| LMArena Expert | 1439 | 1343 |
| SimpleQA Verified | — | 19.6% |
| MMLU-Pro | — | 82% |
| GPQA (HELM) | — | 73.5% |

## Multimodal

- Claude Opus 4.1: 26.8 (#119)
- o4-mini: 40.2 (#49)

| Benchmark | Claude Opus 4.1 | o4-mini |
|---|---|---|
| VPCT | 35% | 57.5% |
| LMArena Vision | — | 1194 |
| GeoBench | — | 64% |

## Multilingual

- Claude Opus 4.1: 52.0 (#95)
- o4-mini: 47.0 (#154)

| Benchmark | Claude Opus 4.1 | o4-mini |
|---|---|---|
| LMArena Non-English | 1405 | 1337 |
| LMArena Chinese | 1427 | 1354 |
| LMArena French | 1431 | 1364 |
| LMArena German | 1413 | 1336 |
| LMArena Japanese | 1378 | 1308 |
| LMArena Korean | 1380 | 1312 |
| LMArena Russian | 1422 | 1334 |
| LMArena Spanish | 1448 | 1347 |

## Instruction Following

- Claude Opus 4.1: 75.6 (#58)
- o4-mini: 75.2 (#68)

| Benchmark | Claude Opus 4.1 | o4-mini |
|---|---|---|
| LMArena Instruction Following | 1435 | 1321 |
| IFEval | — | 92.8% |

## Long Context

- Claude Opus 4.1: 44.5 (#63)
- o4-mini: 45.5 (#33)

| Benchmark | Claude Opus 4.1 | o4-mini |
|---|---|---|
| LMArena Longer Query | 1455 | 1315 |
| Fiction.LiveBench | — | 77.8% |

## Writing & Preference

- Claude Opus 4.1: 62.4 (#74)
- o4-mini: 54.0 (#152)

| Benchmark | Claude Opus 4.1 | o4-mini |
|---|---|---|
| LMArena Text | 1419 | 1353 |
| LMArena Creative Writing | 1412 | 1294 |
| Short-Story Creative Writing | 84.7% | 75% |
| LMArena Multi-Turn | 1444 | 1350 |
| WildBench | — | 85.4% |

## FAQ

### Is Claude Opus 4.1 better than o4-mini?

Claude Opus 4.1 and o4-mini score almost the same on the Noometry Index (41.0 vs 41.6), so choose on price, context window or the category you care about most.

### Which is cheaper, Claude Opus 4.1 or o4-mini?

o4-mini is cheaper. It lists at $1.10 per million input tokens and $4.40 per million output tokens; Claude Opus 4.1 lists at $15 and $75.

### Is Claude Opus 4.1 or o4-mini better for coding?

Claude Opus 4.1 scores higher on coding benchmarks: 44.4 versus 40.9 in the Noometry coding category.

### Which has the bigger context window?

Both accept 200K tokens.

### How many benchmarks do Claude Opus 4.1 and o4-mini share?

41 benchmarks have published results for both models. Claude Opus 4.1 has 48 scored results on Noometry and o4-mini has 60.