Model comparison
Claude Opus 4.1 vs Olmo 3.1 32b Think
Claude Opus 4.1 is the stronger model overall, scoring 40.8 to 37.3 on the Noometry Index.
Last verified . 15 shared benchmarks.
Allen Institute for AI (Ai2)Summary
- They share 15 benchmarks with published results for both. Claude Opus 4.1 scores higher in 7 categories and Olmo 3.1 32b Think in 1 category; 8 gaps are clear of the uncertainty.
- The widest gap is in writing & preference, where Claude Opus 4.1 leads 62.6 to 46.4.
- Olmo 3.1 32b Think has downloadable open weights; the other is API-only.
Side by side
| Claude Opus 4.1 | Olmo 3.1 32b Think | |
|---|---|---|
| Provider | Anthropic | Allen Institute for AI (Ai2) |
| Noometry Index | 40.8 | 37.3 |
| Released | 2025-08-05 | — |
| Weights | Proprietary | Open |
| Context window | 200K | — |
| Max output | 32K | — |
| Input $ / M tokens | $15 | — |
| Output $ / M tokens | $75 | — |
| Results tracked | 48 | 15 |
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Category by category
Coding Claude Opus 4.1 leads
Claude Opus 4.1: 44.3 (#69), Olmo 3.1 32b Think: 37.1 (#186)
| Benchmark | Claude Opus 4.1 | Olmo 3.1 32b Think |
|---|---|---|
| LMArena Coding | 1479 | 1292 |
| 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: 34.8 (#38), Olmo 3.1 32b Think: —
| Benchmark | Claude Opus 4.1 | Olmo 3.1 32b Think |
|---|---|---|
| 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: 31.6 (#70), Olmo 3.1 32b Think: 24.1 (#151)
| Benchmark | Claude Opus 4.1 | Olmo 3.1 32b Think |
|---|---|---|
| LMArena Hard Prompts | 1443 | 1272 |
| SimpleBench | 60% | — |
| Chess Puzzles | 7% | — |
| EnigmaEval | 7.2% | — |
| EBR-Bench | 7.9% | — |
| Mystery Game Puzzles | 21% | — |
| DTBench | 80% | — |
| LMCA | 37.1% | — |
| Epoch Capabilities Index | 144.11 | — |
| ForecastBench | 62 | — |
Math Olmo 3.1 32b Think leads
Claude Opus 4.1: 22.0 (#267), Olmo 3.1 32b Think: 33.6 (#170)
| Benchmark | Claude Opus 4.1 | Olmo 3.1 32b Think |
|---|---|---|
| LMArena Math | 1430 | 1305 |
| FrontierMath (Tiers 1-3) | 12.6% | — |
| FrontierMath Tier 4 | 2.4% | — |
| OTIS Mock AIME 2024-2025 | 68.9% | — |
| FrontierMath (Feb 2025 set) | 7.2% | — |
| FrontierMath Tier 4 (v1) | 4.2% | — |
Knowledge Claude Opus 4.1 leads
Claude Opus 4.1: 41.9 (#93), Olmo 3.1 32b Think: 35.0 (#178)
| Benchmark | Claude Opus 4.1 | Olmo 3.1 32b Think |
|---|---|---|
| LMArena Expert | 1439 | 1294 |
| GPQA Diamond | 77.3% | — |
| Humanity's Last Exam | 11.5% | — |
| Confabulations | 17.1% | — |
| Vectara Hallucination Rate | 11.8% | — |
Multimodal Not comparable
Claude Opus 4.1: 26.2 (#114), Olmo 3.1 32b Think: —
| Benchmark | Claude Opus 4.1 | Olmo 3.1 32b Think |
|---|---|---|
| VPCT | 35% | — |
Multilingual Claude Opus 4.1 leads
Claude Opus 4.1: 52.1 (#90), Olmo 3.1 32b Think: 38.3 (#226)
| Benchmark | Claude Opus 4.1 | Olmo 3.1 32b Think |
|---|---|---|
| LMArena Non-English | 1405 | 1210 |
| LMArena Chinese | 1427 | 1241 |
| LMArena French | 1432 | 1262 |
| LMArena German | 1412 | 1260 |
| LMArena Russian | 1421 | 1193 |
| LMArena Spanish | 1448 | 1288 |
| LMArena Japanese | 1378 | — |
| LMArena Korean | 1381 | — |
Instruction Following Claude Opus 4.1 leads
Claude Opus 4.1: 75.8 (#53), Olmo 3.1 32b Think: 65.8 (#213)
| Benchmark | Claude Opus 4.1 | Olmo 3.1 32b Think |
|---|---|---|
| LMArena Instruction Following | 1436 | 1246 |
Long Context Claude Opus 4.1 leads
Claude Opus 4.1: 44.5 (#60), Olmo 3.1 32b Think: 38.6 (#190)
| Benchmark | Claude Opus 4.1 | Olmo 3.1 32b Think |
|---|---|---|
| LMArena Longer Query | 1455 | 1272 |
Writing & Preference Claude Opus 4.1 leads
Claude Opus 4.1: 62.6 (#70), Olmo 3.1 32b Think: 46.4 (#215)
| Benchmark | Claude Opus 4.1 | Olmo 3.1 32b Think |
|---|---|---|
| LMArena Text | 1419 | 1271 |
| LMArena Creative Writing | 1412 | 1226 |
| LMArena Multi-Turn | 1444 | 1252 |
| Short-Story Creative Writing | 84.7% | — |
Frequently asked questions
Is Claude Opus 4.1 better than Olmo 3.1 32b Think?
Claude Opus 4.1 is the stronger model overall, scoring 40.8 to 37.3 on the Noometry Index.
Is Claude Opus 4.1 or Olmo 3.1 32b Think better for coding?
Claude Opus 4.1 scores higher on coding benchmarks: 44.3 versus 37.1 in the Noometry coding category.
How many benchmarks do Claude Opus 4.1 and Olmo 3.1 32b Think share?
15 benchmarks have published results for both models. Claude Opus 4.1 has 48 scored results on Noometry and Olmo 3.1 32b Think has 15.