Model comparison
Claude Opus 4.1 vs Granite 4.0 H Small
Claude Opus 4.1 is the stronger model overall, scoring 41.0 to 36.5 on the Noometry Index.
Last verified . 14 shared benchmarks.
Summary
- They share 14 benchmarks with published results for both. Claude Opus 4.1 scores higher in 7 categories and Granite 4.0 H Small in 1 category; 8 gaps are clear of the uncertainty.
- The widest gap is in writing & preference, where Claude Opus 4.1 leads 62.4 to 43.8.
- The biggest single-benchmark swing is Vectara Hallucination Rate: 11.8% for Claude Opus 4.1 and 5.2% for Granite 4.0 H Small.
- Granite 4.0 H Small has downloadable open weights; the other is API-only.
Side by side
| Claude Opus 4.1 | Granite 4.0 H Small | |
|---|---|---|
| Provider | Anthropic | IBM |
| Noometry Index | 41.0 | 36.5 |
| Released | 2025-08-05 | — |
| Weights | Proprietary | Open |
| Context window | 200K | — |
| Max output | 32K | — |
| Input $ / M tokens | $15 | — |
| Output $ / M tokens | $75 | — |
| Results tracked | 48 | 19 |
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Category by category
Coding Claude Opus 4.1 leads
Claude Opus 4.1: 44.4 (#73), Granite 4.0 H Small: 36.4 (#209)
| Benchmark | Claude Opus 4.1 | Granite 4.0 H Small |
|---|---|---|
| LMArena Coding | 1479 | 1249 |
| 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), Granite 4.0 H Small: —
| Benchmark | Claude Opus 4.1 | Granite 4.0 H Small |
|---|---|---|
| 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), Granite 4.0 H Small: 24.4 (#163)
| Benchmark | Claude Opus 4.1 | Granite 4.0 H Small |
|---|---|---|
| LMArena Hard Prompts | 1443 | 1240 |
| 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 Granite 4.0 H Small leads
Claude Opus 4.1: 22.3 (#277), Granite 4.0 H Small: 31.4 (#223)
| Benchmark | Claude Opus 4.1 | Granite 4.0 H Small |
|---|---|---|
| LMArena Math | 1431 | 1247 |
| FrontierMath (Tiers 1-3) | 12.6% | — |
| FrontierMath Tier 4 | 2.4% | — |
| OTIS Mock AIME 2024-2025 | 68.9% | — |
| Omni-MATH | — | 29.6% |
| 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), Granite 4.0 H Small: 32.0 (#215)
| Benchmark | Claude Opus 4.1 | Granite 4.0 H Small |
|---|---|---|
| Vectara Hallucination Rate | 11.8% | 5.2% |
| LMArena Expert | 1439 | 1251 |
| GPQA Diamond | 77.3% | — |
| Humanity's Last Exam | 11.5% | — |
| MMLU-Pro | — | 56.9% |
| Confabulations | 17.1% | — |
| GPQA (HELM) | — | 38.3% |
Multimodal Not comparable
Claude Opus 4.1: 26.8 (#119), Granite 4.0 H Small: —
| Benchmark | Claude Opus 4.1 | Granite 4.0 H Small |
|---|---|---|
| VPCT | 35% | — |
Multilingual Claude Opus 4.1 leads
Claude Opus 4.1: 52.0 (#95), Granite 4.0 H Small: 38.6 (#228)
| Benchmark | Claude Opus 4.1 | Granite 4.0 H Small |
|---|---|---|
| LMArena Non-English | 1405 | 1216 |
| LMArena Chinese | 1427 | 1249 |
| LMArena Russian | 1422 | 1201 |
| LMArena Spanish | 1448 | 1258 |
| LMArena French | 1431 | — |
| LMArena German | 1413 | — |
| LMArena Japanese | 1378 | — |
| LMArena Korean | 1380 | — |
Instruction Following Claude Opus 4.1 leads
Claude Opus 4.1: 75.6 (#58), Granite 4.0 H Small: 68.7 (#183)
| Benchmark | Claude Opus 4.1 | Granite 4.0 H Small |
|---|---|---|
| LMArena Instruction Following | 1435 | 1222 |
| IFEval | — | 89% |
Long Context Claude Opus 4.1 leads
Claude Opus 4.1: 44.5 (#63), Granite 4.0 H Small: 37.7 (#213)
| Benchmark | Claude Opus 4.1 | Granite 4.0 H Small |
|---|---|---|
| LMArena Longer Query | 1455 | 1242 |
Writing & Preference Claude Opus 4.1 leads
Claude Opus 4.1: 62.4 (#74), Granite 4.0 H Small: 43.8 (#227)
| Benchmark | Claude Opus 4.1 | Granite 4.0 H Small |
|---|---|---|
| LMArena Text | 1419 | 1241 |
| LMArena Creative Writing | 1412 | 1211 |
| LMArena Multi-Turn | 1444 | 1242 |
| Short-Story Creative Writing | 84.7% | — |
| WildBench | — | 73.9% |
Frequently asked questions
Is Claude Opus 4.1 better than Granite 4.0 H Small?
Claude Opus 4.1 is the stronger model overall, scoring 41.0 to 36.5 on the Noometry Index.
Is Claude Opus 4.1 or Granite 4.0 H Small better for coding?
Claude Opus 4.1 scores higher on coding benchmarks: 44.4 versus 36.4 in the Noometry coding category.
How many benchmarks do Claude Opus 4.1 and Granite 4.0 H Small share?
14 benchmarks have published results for both models. Claude Opus 4.1 has 48 scored results on Noometry and Granite 4.0 H Small has 19.