Model comparison
Claude Opus 4.1 vs Olmo 2 0325 32b Instruct
Claude Opus 4.1 is the stronger model overall, scoring 41.0 to 32.7 on the Noometry Index.
Last verified . 11 shared benchmarks.
Allen Institute for AI (Ai2)Summary
- They share 11 benchmarks with published results for both. Claude Opus 4.1 scores higher in 7 categories and Olmo 2 0325 32b Instruct in 1 category; 8 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where Claude Opus 4.1 leads 42.0 to 19.5.
- Olmo 2 0325 32b Instruct has downloadable open weights; the other is API-only.
Side by side
| Claude Opus 4.1 | Olmo 2 0325 32b Instruct | |
|---|---|---|
| Provider | Anthropic | Allen Institute for AI (Ai2) |
| Noometry Index | 41.0 | 32.7 |
| Released | 2025-08-05 | — |
| Weights | Proprietary | Open |
| Context window | 200K | — |
| Max output | 32K | — |
| Input $ / M tokens | $15 | — |
| Output $ / M tokens | $75 | — |
| Results tracked | 48 | 16 |
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Category by category
Coding Claude Opus 4.1 leads
Claude Opus 4.1: 44.4 (#73), Olmo 2 0325 32b Instruct: 35.2 (#227)
| Benchmark | Claude Opus 4.1 | Olmo 2 0325 32b Instruct |
|---|---|---|
| LMArena Coding | 1479 | 1210 |
| SWE-bench Verified | 73.3% | — |
| LMArena WebDev | 1390 | — |
| WeirdML | 45.9% | — |
| ALE-Bench | 674.77 | — |
| AlgoTune | 1.34 | — |
Agentic & Tool Use Not comparable
Claude Opus 4.1: 35.0 (#41), Olmo 2 0325 32b Instruct: —
| Benchmark | Claude Opus 4.1 | Olmo 2 0325 32b Instruct |
|---|---|---|
| Terminal-Bench | 38% | — |
| GDPval | 43.6% | — |
| Cybench | 42% | — |
| DeepResearch Bench | 48.3% | — |
| LMArena Search | 1148 | — |
| METR Time Horizons | 66.8% | — |
Reasoning Claude Opus 4.1 leads
Claude Opus 4.1: 32.2 (#76), Olmo 2 0325 32b Instruct: 23.6 (#175)
| Benchmark | Claude Opus 4.1 | Olmo 2 0325 32b Instruct |
|---|---|---|
| LMArena Hard Prompts | 1443 | 1208 |
| SimpleBench | 60% | — |
| Chess Puzzles | 7% | — |
| EnigmaEval | 7.2% | — |
| EBR-Bench | 7.9% | — |
| Mystery Game Puzzles | 21% | — |
| DTBench | 80% | — |
| LMCA | 37.1% | — |
| Epoch Capabilities Index | 144.12 | — |
| ForecastBench | 62 | — |
Math Olmo 2 0325 32b Instruct leads
Claude Opus 4.1: 22.3 (#277), Olmo 2 0325 32b Instruct: 26.8 (#255)
| Benchmark | Claude Opus 4.1 | Olmo 2 0325 32b Instruct |
|---|---|---|
| LMArena Math | 1431 | 1208 |
| FrontierMath (Tiers 1-3) | 12.6% | — |
| FrontierMath Tier 4 | 2.4% | — |
| OTIS Mock AIME 2024-2025 | 68.9% | — |
| Omni-MATH | — | 16.1% |
| FrontierMath (Feb 2025 set) | 7.2% | — |
| FrontierMath Tier 4 (v1) | 4.2% | — |
Knowledge Claude Opus 4.1 leads
Claude Opus 4.1: 42.0 (#101), Olmo 2 0325 32b Instruct: 19.5 (#279)
| Benchmark | Claude Opus 4.1 | Olmo 2 0325 32b Instruct |
|---|---|---|
| GPQA Diamond | 77.3% | — |
| Humanity's Last Exam | 11.5% | — |
| MMLU-Pro | — | 41.4% |
| Confabulations | 17.1% | — |
| Vectara Hallucination Rate | 11.8% | — |
| GPQA (HELM) | — | 28.7% |
| LMArena Expert | 1439 | — |
Multimodal Not comparable
Claude Opus 4.1: 26.8 (#119), Olmo 2 0325 32b Instruct: —
| Benchmark | Claude Opus 4.1 | Olmo 2 0325 32b Instruct |
|---|---|---|
| VPCT | 35% | — |
Multilingual Claude Opus 4.1 leads
Claude Opus 4.1: 52.0 (#95), Olmo 2 0325 32b Instruct: 34.8 (#248)
| Benchmark | Claude Opus 4.1 | Olmo 2 0325 32b Instruct |
|---|---|---|
| LMArena Non-English | 1405 | 1160 |
| LMArena Chinese | 1427 | 1192 |
| LMArena Russian | 1422 | 1187 |
| LMArena French | 1431 | — |
| LMArena German | 1413 | — |
| LMArena Japanese | 1378 | — |
| LMArena Korean | 1380 | — |
| LMArena Spanish | 1448 | — |
Instruction Following Claude Opus 4.1 leads
Claude Opus 4.1: 75.6 (#58), Olmo 2 0325 32b Instruct: 61.5 (#244)
| Benchmark | Claude Opus 4.1 | Olmo 2 0325 32b Instruct |
|---|---|---|
| LMArena Instruction Following | 1435 | 1186 |
| IFEval | — | 78% |
Long Context Claude Opus 4.1 leads
Claude Opus 4.1: 44.5 (#63), Olmo 2 0325 32b Instruct: 36.2 (#234)
| Benchmark | Claude Opus 4.1 | Olmo 2 0325 32b Instruct |
|---|---|---|
| LMArena Longer Query | 1455 | 1194 |
Writing & Preference Claude Opus 4.1 leads
Claude Opus 4.1: 62.4 (#74), Olmo 2 0325 32b Instruct: 42.1 (#236)
| Benchmark | Claude Opus 4.1 | Olmo 2 0325 32b Instruct |
|---|---|---|
| LMArena Text | 1419 | 1218 |
| LMArena Creative Writing | 1412 | 1199 |
| LMArena Multi-Turn | 1444 | 1221 |
| Short-Story Creative Writing | 84.7% | — |
| WildBench | — | 73.4% |
Frequently asked questions
Is Claude Opus 4.1 better than Olmo 2 0325 32b Instruct?
Claude Opus 4.1 is the stronger model overall, scoring 41.0 to 32.7 on the Noometry Index.
Is Claude Opus 4.1 or Olmo 2 0325 32b Instruct better for coding?
Claude Opus 4.1 scores higher on coding benchmarks: 44.4 versus 35.2 in the Noometry coding category.
How many benchmarks do Claude Opus 4.1 and Olmo 2 0325 32b Instruct share?
11 benchmarks have published results for both models. Claude Opus 4.1 has 48 scored results on Noometry and Olmo 2 0325 32b Instruct has 16.