Model comparison
Gemma 2 9B vs GPT-5.5 Pro
GPT-5.5 Pro is the stronger model overall, scoring 64.3 to 25.7 on the Noometry Index.
Last verified . 3 shared benchmarks.
GoogleSummary
- They share 3 benchmarks with published results for both. Gemma 2 9B scores higher in 0 categories and GPT-5.5 Pro in 3 categories; 3 gaps are clear of the uncertainty.
- The widest gap is in math, where GPT-5.5 Pro leads 83.8 to 9.3.
- The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 0.6% for Gemma 2 9B and 100% for GPT-5.5 Pro.
- Gemma 2 9B has downloadable open weights; the other is API-only.
Side by side
| Gemma 2 9B | GPT-5.5 Pro | |
|---|---|---|
| Provider | OpenAI | |
| Noometry Index | 25.7 | 64.3 |
| Released | 2024-06-24 | 2026-04-23 |
| Weights | Open | Proprietary |
| Context window | — | 1.05M |
| Max output | — | 128K |
| Input $ / M tokens | — | $30 |
| Output $ / M tokens | — | $180 |
| Results tracked | 35 | 14 |
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Category by category
Coding Not comparable
Gemma 2 9B: 29.0 (#299), GPT-5.5 Pro: —
| Benchmark | Gemma 2 9B | GPT-5.5 Pro |
|---|---|---|
| BigCodeBench Instruct | 34.7% | — |
| LiveBench Coding | 22.5% | — |
| LMArena Coding | 1174 | — |
| BigCodeBench Complete | 40.6% | — |
Reasoning GPT-5.5 Pro leads
Gemma 2 9B: 15.3 (#306), GPT-5.5 Pro: 73.6 (#7)
| Benchmark | Gemma 2 9B | GPT-5.5 Pro |
|---|---|---|
| Epoch Capabilities Index | 119.78 | 162.45 |
| ARC-AGI-2 | — | 84.6% |
| SimpleBench | — | 76.9% |
| ARC-AGI-1 | — | 96.5% |
| CritPt | — | 30.6% |
| Chess Puzzles | — | 64% |
| LiveBench Reasoning | 15.2% | — |
| LMArena Hard Prompts | 1172 | — |
| DTBench | — | 96% |
| LiveBench Data Analysis | 36.4% | — |
| LMCA | — | 53.9% |
| LiveBench | 28.7% | — |
| PIQA | 83.7% | — |
Math GPT-5.5 Pro leads
Gemma 2 9B: 9.3 (#312), GPT-5.5 Pro: 83.8 (#8)
| Benchmark | Gemma 2 9B | GPT-5.5 Pro |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 0.6% | 100% |
| FrontierMath (Tiers 1-3) | — | 87.7% |
| FrontierMath Tier 4 | — | 78% |
| LiveBench Math | 19.8% | — |
| LMArena Math | 1183 | — |
| MATH Level 5 | 21% | — |
| FrontierMath (Feb 2025 set) | — | 52.4% |
| FrontierMath Tier 4 (v1) | — | 39.6% |
| GSM8K | 84.9% | — |
Knowledge GPT-5.5 Pro leads
Gemma 2 9B: 9.7 (#300), GPT-5.5 Pro: 64.2 (#17)
| Benchmark | Gemma 2 9B | GPT-5.5 Pro |
|---|---|---|
| GPQA Diamond | 27.5% | 93.9% |
| LMArena Expert | 1147 | — |
| BoolQ | 85.7% | — |
| MMLU | 72.1% | — |
Multilingual Not comparable
Gemma 2 9B: 36.8 (#233), GPT-5.5 Pro: —
| Benchmark | Gemma 2 9B | GPT-5.5 Pro |
|---|---|---|
| LMArena Non-English | 1188 | — |
| LMArena Chinese | 1185 | — |
| LMArena French | 1189 | — |
| LMArena German | 1186 | — |
| LMArena Japanese | 1144 | — |
| LMArena Korean | 1137 | — |
| LMArena Russian | 1200 | — |
| LMArena Spanish | 1200 | — |
Instruction Following Not comparable
Gemma 2 9B: 57.8 (#264), GPT-5.5 Pro: —
| Benchmark | Gemma 2 9B | GPT-5.5 Pro |
|---|---|---|
| LiveBench Instruction Following | 52.6% | — |
| LMArena Instruction Following | 1178 | — |
Long Context Not comparable
Gemma 2 9B: 36.3 (#228), GPT-5.5 Pro: —
| Benchmark | Gemma 2 9B | GPT-5.5 Pro |
|---|---|---|
| LMArena Longer Query | 1197 | — |
Writing & Preference Not comparable
Gemma 2 9B: 32.3 (#276), GPT-5.5 Pro: —
| Benchmark | Gemma 2 9B | GPT-5.5 Pro |
|---|---|---|
| LMArena Text | 1207 | — |
| LMArena Creative Writing | 1206 | — |
| EQ-Bench Creative Writing | 841 | — |
| LMArena Multi-Turn | 1193 | — |
| LiveBench Language | 25.5% | — |
Frequently asked questions
Is Gemma 2 9B better than GPT-5.5 Pro?
GPT-5.5 Pro is the stronger model overall, scoring 64.3 to 25.7 on the Noometry Index.
How many benchmarks do Gemma 2 9B and GPT-5.5 Pro share?
3 benchmarks have published results for both models. Gemma 2 9B has 35 scored results on Noometry and GPT-5.5 Pro has 14.