# Claude Opus 4.8 vs o4-mini

> Claude Opus 4.8 is the stronger model overall, scoring 60.7 to 41.6 on the Noometry Index. o4-mini costs 5.2× less per token, which makes it the better buy when Claude Opus 4.8's lead doesn't matter for your workload.

- Canonical page: https://noometry.com/compare/claude-opus-4-8-vs-o4-mini
- Last updated: 2026-10-10
- Shared benchmarks: 40

## Summary

- They share 40 benchmarks with published results for both. Claude Opus 4.8 scores higher in 9 categories and o4-mini in 1 category; 9 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Claude Opus 4.8 leads 64.7 to 24.6.
- The biggest single-benchmark swing is ARC-AGI-2: 72.1% for Claude Opus 4.8 and 6.1% for o4-mini.
- o4-mini is cheaper at $1.10 / $4.40 per million input/output tokens, against $5 / $25 for Claude Opus 4.8.
- Claude Opus 4.8 accepts more context: 1M tokens versus 200K.

## Snapshot

| | Claude Opus 4.8 | o4-mini |
|---|---|---|
| Provider | Anthropic | OpenAI |
| Noometry Index | 60.7 | 41.6 |
| Rank | 13 | 132 |
| Context | 1M | 200K |
| Input $/M | $5 | $1.10 |
| Output $/M | $25 | $4.40 |
| Weights | Proprietary | Proprietary |

## Coding

- Claude Opus 4.8: 59.9 (#12)
- o4-mini: 40.9 (#127)

| Benchmark | Claude Opus 4.8 | o4-mini |
|---|---|---|
| GSO | 47.1% | 3.6% |
| WeirdML | 82.9% | 52.6% |
| LMArena Coding | 1490 | 1368 |
| ALE-Bench | 1,564 | 826.17 |
| DeepSWE | 59% | — |
| FrontierCode | 46.5% | — |
| SWE-bench Verified (bash only) | — | 45% |
| Aider Polyglot | — | 72% |
| LMArena WebDev | 1556 | — |
| SciCode | 53.5% | — |
| CadEval | — | 62% |
| AlgoTune | — | 1.72 |

## Agentic & Tool Use

- Claude Opus 4.8: 47.6 (#11)
- o4-mini: 32.6 (#61)

| Benchmark | Claude Opus 4.8 | o4-mini |
|---|---|---|
| APEX-Agents | 48.9% | — |
| Berkeley Function Calling Leaderboard | — | 53.2% |
| OSWorld 2.0 | 20.6% | — |
| GDPval | — | 25.3% |
| Remote Labor Index | 8.3% | — |
| τ²-bench Banking | 39.7% | — |
| DeepResearch Bench | 50.2% | — |
| PostTrainBench | 33.8% | — |
| GBAEval | 70.9% | — |
| GDP.pdf | 24% | — |
| LMArena Search | 1204 | — |
| METR Time Horizons | — | 63.9% |
| Vending-Bench 2 | 5,787 | — |

## Reasoning

- Claude Opus 4.8: 64.7 (#16)
- o4-mini: 24.6 (#162)

| Benchmark | Claude Opus 4.8 | o4-mini |
|---|---|---|
| ARC-AGI-2 | 72.1% | 6.1% |
| SimpleBench | 64.8% | 38.7% |
| Kagi LLM Benchmark | 88.8% | 67.6% |
| ARC-AGI-1 | 92.5% | 58.7% |
| CritPt | 20.9% | 0.6% |
| Chess Puzzles | 34% | 26% |
| EnigmaEval | 23.5% | 9.2% |
| LMArena Hard Prompts | 1482 | 1351 |
| Mystery Game Puzzles | 36% | 5% |
| DTBench | 94.9% | 77.6% |
| LMCA | 57.5% | 26.5% |
| Epoch Capabilities Index | 158.21 | 145.64 |
| ForecastBench | 59.9 | 61.8 |
| NYT Connections (extended) | 91.1% | — |
| EBR-Bench | 28.6% | — |
| Surface Evolver Bench | 87.5% | — |
| Bench to the Future 3 | 0.14 | — |

## Math

- Claude Opus 4.8: 78.4 (#13)
- o4-mini: 40.8 (#89)

| Benchmark | Claude Opus 4.8 | o4-mini |
|---|---|---|
| FrontierMath (Tiers 1-3) | 80% | 36.1% |
| FrontierMath Tier 4 | 56.1% | 4.9% |
| OTIS Mock AIME 2024-2025 | 98.3% | 81.7% |
| LMArena Math | 1487 | 1389 |
| FrontierMath (Feb 2025 set) | 47.2% | 24.8% |
| FrontierMath Tier 4 (v1) | 31.3% | 6.3% |
| MathArena Final-Answer Competitions | 91.8% | — |
| ProofBench | 69% | — |
| Omni-MATH | — | 72% |
| MATH Level 5 | — | 97.8% |

## Knowledge

- Claude Opus 4.8: 61.3 (#29)
- o4-mini: 43.6 (#91)

| Benchmark | Claude Opus 4.8 | o4-mini |
|---|---|---|
| GPQA Diamond | 91% | 79.6% |
| SimpleQA Verified | 53% | 19.6% |
| LMArena Expert | 1502 | 1343 |
| Humanity's Last Exam | — | 18.1% |
| MMLU-Pro | — | 82% |
| Confabulations | — | 15.8% |
| Vectara Hallucination Rate | — | 18.6% |
| GPQA (HELM) | — | 73.5% |

## Multimodal

- Claude Opus 4.8: 42.9 (#26)
- o4-mini: 40.2 (#49)

| Benchmark | Claude Opus 4.8 | o4-mini |
|---|---|---|
| LMArena Vision | 1294 | 1194 |
| GeoBench | — | 64% |
| VPCT | — | 57.5% |
| Blueprint-Bench 2 | 14.5% | — |
| Furniture Assembly | 42.5% | — |
| LMArena Document | 1475 | — |

## Multilingual

- Claude Opus 4.8: 55.2 (#33)
- o4-mini: 47.0 (#154)

| Benchmark | Claude Opus 4.8 | o4-mini |
|---|---|---|
| LMArena Non-English | 1450 | 1337 |
| LMArena Chinese | 1507 | 1354 |
| LMArena French | 1481 | 1364 |
| LMArena German | 1472 | 1336 |
| LMArena Japanese | 1440 | 1308 |
| LMArena Korean | 1432 | 1312 |
| LMArena Russian | 1474 | 1334 |
| LMArena Spanish | 1466 | 1347 |

## Instruction Following

- Claude Opus 4.8: 77.4 (#24)
- o4-mini: 75.2 (#68)

| Benchmark | Claude Opus 4.8 | o4-mini |
|---|---|---|
| LMArena Instruction Following | 1476 | 1321 |
| IFEval | — | 92.8% |

## Long Context

- Claude Opus 4.8: 45.4 (#35)
- o4-mini: 45.5 (#33)

| Benchmark | Claude Opus 4.8 | o4-mini |
|---|---|---|
| LMArena Longer Query | 1483 | 1315 |
| Fiction.LiveBench | — | 77.8% |

## Writing & Preference

- Claude Opus 4.8: 72.0 (#16)
- o4-mini: 54.0 (#152)

| Benchmark | Claude Opus 4.8 | o4-mini |
|---|---|---|
| LMArena Text | 1461 | 1353 |
| LMArena Creative Writing | 1454 | 1294 |
| LMArena Multi-Turn | 1476 | 1350 |
| Short-Story Creative Writing | — | 75% |
| EQ-Bench Creative Writing | 1840 | — |
| WildBench | — | 85.4% |
| EQ-Bench 4 | 1281 | — |

## FAQ

### Is Claude Opus 4.8 better than o4-mini?

Claude Opus 4.8 is the stronger model overall, scoring 60.7 to 41.6 on the Noometry Index. o4-mini costs 5.2× less per token, which makes it the better buy when Claude Opus 4.8's lead doesn't matter for your workload.

### Which is cheaper, Claude Opus 4.8 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 4.8 lists at $5 and $25.

### Is Claude Opus 4.8 or o4-mini better for coding?

Claude Opus 4.8 scores higher on coding benchmarks: 59.9 versus 40.9 in the Noometry coding category.

### Which has the bigger context window?

Claude Opus 4.8 does, with 1M tokens against 200K.

### How many benchmarks do Claude Opus 4.8 and o4-mini share?

40 benchmarks have published results for both models. Claude Opus 4.8 has 65 scored results on Noometry and o4-mini has 60.