Model comparison
GPT-5.5 Pro vs Olmo 2 0325 32b Instruct
GPT-5.5 Pro is the stronger model overall, scoring 64.3 to 32.7 on the Noometry Index.
Last verified . 0 shared benchmarks.
Allen Institute for AI (Ai2)Summary
- The widest gap is in math, where GPT-5.5 Pro leads 84.0 to 26.8.
- Olmo 2 0325 32b Instruct has downloadable open weights; the other is API-only.
Side by side
| GPT-5.5 Pro | Olmo 2 0325 32b Instruct | |
|---|---|---|
| Provider | OpenAI | Allen Institute for AI (Ai2) |
| Noometry Index | 64.3 | 32.7 |
| Released | 2026-04-23 | — |
| Weights | Proprietary | Open |
| Context window | 1.05M | — |
| Max output | 128K | — |
| Input $ / M tokens | $30 | — |
| Output $ / M tokens | $180 | — |
| Results tracked | 14 | 16 |
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Category by category
Coding Not comparable
GPT-5.5 Pro: —, Olmo 2 0325 32b Instruct: 35.2 (#227)
| Benchmark | GPT-5.5 Pro | Olmo 2 0325 32b Instruct |
|---|---|---|
| LMArena Coding | — | 1210 |
Reasoning GPT-5.5 Pro leads
GPT-5.5 Pro: 73.3 (#10), Olmo 2 0325 32b Instruct: 23.6 (#175)
| Benchmark | GPT-5.5 Pro | Olmo 2 0325 32b Instruct |
|---|---|---|
| ARC-AGI-2 | 84.6% | — |
| SimpleBench | 76.9% | — |
| ARC-AGI-1 | 96.5% | — |
| CritPt | 30.6% | — |
| Chess Puzzles | 64% | — |
| LMArena Hard Prompts | — | 1208 |
| DTBench | 96% | — |
| LMCA | 53.9% | — |
| Epoch Capabilities Index | 162.07 | — |
Math GPT-5.5 Pro leads
GPT-5.5 Pro: 84.0 (#10), Olmo 2 0325 32b Instruct: 26.8 (#255)
| Benchmark | GPT-5.5 Pro | Olmo 2 0325 32b Instruct |
|---|---|---|
| FrontierMath (Tiers 1-3) | 87.7% | — |
| FrontierMath Tier 4 | 78% | — |
| OTIS Mock AIME 2024-2025 | 100% | — |
| Omni-MATH | — | 16.1% |
| LMArena Math | — | 1208 |
| FrontierMath (Feb 2025 set) | 52.4% | — |
| FrontierMath Tier 4 (v1) | 39.6% | — |
Knowledge GPT-5.5 Pro leads
GPT-5.5 Pro: 64.1 (#19), Olmo 2 0325 32b Instruct: 19.5 (#279)
| Benchmark | GPT-5.5 Pro | Olmo 2 0325 32b Instruct |
|---|---|---|
| GPQA Diamond | 93.9% | — |
| MMLU-Pro | — | 41.4% |
| GPQA (HELM) | — | 28.7% |
Multilingual Not comparable
GPT-5.5 Pro: —, Olmo 2 0325 32b Instruct: 34.8 (#248)
| Benchmark | GPT-5.5 Pro | Olmo 2 0325 32b Instruct |
|---|---|---|
| LMArena Non-English | — | 1160 |
| LMArena Chinese | — | 1192 |
| LMArena Russian | — | 1187 |
Instruction Following Not comparable
GPT-5.5 Pro: —, Olmo 2 0325 32b Instruct: 61.5 (#244)
| Benchmark | GPT-5.5 Pro | Olmo 2 0325 32b Instruct |
|---|---|---|
| IFEval | — | 78% |
| LMArena Instruction Following | — | 1186 |
Long Context Not comparable
GPT-5.5 Pro: —, Olmo 2 0325 32b Instruct: 36.2 (#234)
| Benchmark | GPT-5.5 Pro | Olmo 2 0325 32b Instruct |
|---|---|---|
| LMArena Longer Query | — | 1194 |
Writing & Preference Not comparable
GPT-5.5 Pro: —, Olmo 2 0325 32b Instruct: 42.1 (#236)
| Benchmark | GPT-5.5 Pro | Olmo 2 0325 32b Instruct |
|---|---|---|
| LMArena Text | — | 1218 |
| LMArena Creative Writing | — | 1199 |
| WildBench | — | 73.4% |
| LMArena Multi-Turn | — | 1221 |
Frequently asked questions
Is GPT-5.5 Pro better than Olmo 2 0325 32b Instruct?
GPT-5.5 Pro is the stronger model overall, scoring 64.3 to 32.7 on the Noometry Index.
How many benchmarks do GPT-5.5 Pro and Olmo 2 0325 32b Instruct share?
0 benchmarks have published results for both models. GPT-5.5 Pro has 14 scored results on Noometry and Olmo 2 0325 32b Instruct has 16.