Model comparison
Claude Opus 5.5 vs Gemma 2 9B
Claude Opus 5.5 is the stronger model overall, scoring 68.6 to 25.9 on the Noometry Index.
Last verified . 18 shared benchmarks.
GoogleSummary
- They share 18 benchmarks with published results for both. Claude Opus 5.5 scores higher in 8 categories and Gemma 2 9B in 0 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in math, where Claude Opus 5.5 leads 91.8 to 9.9.
- The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 100% for Claude Opus 5.5 and 0.6% for Gemma 2 9B.
- Gemma 2 9B has downloadable open weights; the other is API-only.
Side by side
| Claude Opus 5.5 | Gemma 2 9B | |
|---|---|---|
| Provider | Anthropic | |
| Noometry Index | 68.6 | 25.9 |
| Released | 2026-09-22 | 2024-06-24 |
| Weights | Proprietary | Open |
| Context window | 1M | — |
| Max output | 128K | — |
| Input $ / M tokens | $4 | — |
| Output $ / M tokens | $20 | — |
| Results tracked | 44 | 35 |
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Category by category
Coding Claude Opus 5.5 leads
Claude Opus 5.5: 71.9 (#3), Gemma 2 9B: 29.4 (#304)
| Benchmark | Claude Opus 5.5 | Gemma 2 9B |
|---|---|---|
| LMArena Coding | 1547 | 1173 |
| FrontierCode | 54.6% | — |
| CursorBench | 57.8% | — |
| LMArena WebDev | 1813 | — |
| FrontierSWE | 62.3% | — |
| SciCode | 66.9% | — |
| BigCodeBench Instruct | — | 34.7% |
| LiveBench Coding | — | 22.5% |
| MirrorCode | 77.4% | — |
| BigCodeBench Complete | — | 40.6% |
| ALE-Bench | 2,147 | — |
Agentic & Tool Use Not comparable
Claude Opus 5.5: 45.3 (#15), Gemma 2 9B: —
| Benchmark | Claude Opus 5.5 | Gemma 2 9B |
|---|---|---|
| APEX-Agents | 73.5% | — |
| GDP.pdf | 30.6% | — |
| Vending-Bench 2 | 9,235 | — |
Reasoning Claude Opus 5.5 leads
Claude Opus 5.5: 80.2 (#3), Gemma 2 9B: 15.9 (#309)
| Benchmark | Claude Opus 5.5 | Gemma 2 9B |
|---|---|---|
| LMArena Hard Prompts | 1535 | 1171 |
| Epoch Capabilities Index | 167.33 | 119.83 |
| ARC-AGI-2 | 93.3% | — |
| NYT Connections (extended) | 88.5% | — |
| ARC-AGI-1 | 98.5% | — |
| CritPt | 31.7% | — |
| EBR-Bench | 71.4% | — |
| LiveBench Reasoning | — | 15.2% |
| Mystery Game Puzzles | 71% | — |
| DTBench | 98.9% | — |
| LiveBench Data Analysis | — | 36.4% |
| LMCA | 68.2% | — |
| LiveBench | — | 28.7% |
| PIQA | — | 83.7% |
Math Claude Opus 5.5 leads
Claude Opus 5.5: 91.8 (#3), Gemma 2 9B: 9.9 (#318)
| Benchmark | Claude Opus 5.5 | Gemma 2 9B |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 100% | 0.6% |
| LMArena Math | 1506 | 1183 |
| FrontierMath (Tiers 1-3) | 91.2% | — |
| FrontierMath Tier 4 | 95% | — |
| ProofBench | 100% | — |
| LiveBench Math | — | 19.8% |
| MATH Level 5 | — | 21% |
| FrontierMath Erdős | 2.9% | — |
| GSM8K | — | 84.9% |
Knowledge Claude Opus 5.5 leads
Claude Opus 5.5: 66.4 (#10), Gemma 2 9B: 9.7 (#305)
| Benchmark | Claude Opus 5.5 | Gemma 2 9B |
|---|---|---|
| GPQA Diamond | 90.6% | 27.5% |
| LMArena Expert | 1547 | 1147 |
| SimpleQA Verified | 72.2% | — |
| BoolQ | — | 85.7% |
| MMLU | — | 72.1% |
Multimodal Not comparable
Claude Opus 5.5: 57.8 (#1), Gemma 2 9B: —
| Benchmark | Claude Opus 5.5 | Gemma 2 9B |
|---|---|---|
| LMArena Vision | 1321 | — |
| Blueprint-Bench 2 | 51.2% | — |
| Furniture Assembly | 83.3% | — |
Multilingual Claude Opus 5.5 leads
Claude Opus 5.5: 59.1 (#2), Gemma 2 9B: 36.6 (#238)
| Benchmark | Claude Opus 5.5 | Gemma 2 9B |
|---|---|---|
| LMArena Non-English | 1507 | 1188 |
| LMArena Chinese | 1588 | 1185 |
| LMArena French | 1514 | 1190 |
| LMArena Russian | 1520 | 1200 |
| LMArena Spanish | 1507 | 1200 |
| LMArena German | — | 1186 |
| LMArena Japanese | — | 1144 |
| LMArena Korean | — | 1137 |
Instruction Following Claude Opus 5.5 leads
Claude Opus 5.5: 80.0 (#3), Gemma 2 9B: 57.6 (#269)
| Benchmark | Claude Opus 5.5 | Gemma 2 9B |
|---|---|---|
| LMArena Instruction Following | 1537 | 1178 |
| LiveBench Instruction Following | — | 52.6% |
Long Context Claude Opus 5.5 leads
Claude Opus 5.5: 47.1 (#19), Gemma 2 9B: 36.3 (#233)
| Benchmark | Claude Opus 5.5 | Gemma 2 9B |
|---|---|---|
| LMArena Longer Query | 1532 | 1197 |
Writing & Preference Claude Opus 5.5 leads
Claude Opus 5.5: 78.2 (#3), Gemma 2 9B: 32.1 (#281)
| Benchmark | Claude Opus 5.5 | Gemma 2 9B |
|---|---|---|
| LMArena Text | 1515 | 1207 |
| LMArena Creative Writing | 1533 | 1206 |
| EQ-Bench Creative Writing | 2050 | 841 |
| LMArena Multi-Turn | 1499 | 1193 |
| LiveBench Language | — | 25.5% |
Frequently asked questions
Is Claude Opus 5.5 better than Gemma 2 9B?
Claude Opus 5.5 is the stronger model overall, scoring 68.6 to 25.9 on the Noometry Index.
Is Claude Opus 5.5 or Gemma 2 9B better for coding?
Claude Opus 5.5 scores higher on coding benchmarks: 71.9 versus 29.4 in the Noometry coding category.
How many benchmarks do Claude Opus 5.5 and Gemma 2 9B share?
18 benchmarks have published results for both models. Claude Opus 5.5 has 44 scored results on Noometry and Gemma 2 9B has 35.