Model comparison
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.
Last verified . 41 shared benchmarks.
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.
Side by side
| Claude Opus 4.1 | o4-mini | |
|---|---|---|
| Provider | Anthropic | OpenAI |
| Noometry Index | 41.0 | 41.6 |
| Released | 2025-08-05 | 2025-04-16 |
| Weights | Proprietary | Proprietary |
| Context window | 200K | 200K |
| Max output | 32K | 100K |
| Input $ / M tokens | $15 | $1.10 |
| Output $ / M tokens | $75 | $4.40 |
| Results tracked | 48 | 60 |
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Category by category
Coding Claude Opus 4.1 leads
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 leads
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 leads
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 o4-mini leads
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 o4-mini leads
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 o4-mini leads
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 leads
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 Too close to call
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 o4-mini leads
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 leads
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% |
Frequently asked questions
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.