Model comparison
GPT-5.5 Pro vs o1-mini
GPT-5.5 Pro is the stronger model overall, scoring 64.3 to 34.0 on the Noometry Index.
Last verified . 7 shared benchmarks.
Summary
- They share 7 benchmarks with published results for both. GPT-5.5 Pro scores higher in 3 categories and o1-mini in 0 categories; 3 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where GPT-5.5 Pro leads 73.3 to 8.8.
- The biggest single-benchmark swing is ARC-AGI-2: 84.6% for GPT-5.5 Pro and 0.8% for o1-mini.
Side by side
| GPT-5.5 Pro | o1-mini | |
|---|---|---|
| Provider | OpenAI | OpenAI |
| Noometry Index | 64.3 | 34.0 |
| Released | 2026-04-23 | 2024-09-12 |
| Weights | Proprietary | Proprietary |
| Context window | 1.05M | — |
| Max output | 128K | — |
| Input $ / M tokens | $30 | — |
| Output $ / M tokens | $180 | — |
| Results tracked | 14 | 39 |
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Category by category
Coding Not comparable
GPT-5.5 Pro: —, o1-mini: 35.5 (#224)
| Benchmark | GPT-5.5 Pro | o1-mini |
|---|---|---|
| Aider Polyglot | — | 32.9% |
| WeirdML | — | 36.3% |
| LiveBench Coding | — | 48% |
| LMArena Coding | — | 1362 |
| HumanEval+ | — | 89% |
| MBPP+ | — | 78.8% |
Agentic & Tool Use Not comparable
GPT-5.5 Pro: —, o1-mini: 24.6 (#118)
| Benchmark | GPT-5.5 Pro | o1-mini |
|---|---|---|
| Cybench | — | 10% |
Reasoning GPT-5.5 Pro leads
GPT-5.5 Pro: 73.3 (#10), o1-mini: 8.8 (#346)
| Benchmark | GPT-5.5 Pro | o1-mini |
|---|---|---|
| ARC-AGI-2 | 84.6% | 0.8% |
| SimpleBench | 76.9% | 18.1% |
| ARC-AGI-1 | 96.5% | 14% |
| Epoch Capabilities Index | 162.07 | 135.82 |
| CritPt | 30.6% | — |
| Chess Puzzles | 64% | — |
| LiveBench Reasoning | — | 72.3% |
| LMArena Hard Prompts | — | 1333 |
| DTBench | 96% | — |
| LiveBench Data Analysis | — | 57.9% |
| LMCA | 53.9% | — |
| LiveBench | — | 57.8% |
Math GPT-5.5 Pro leads
GPT-5.5 Pro: 84.0 (#10), o1-mini: 35.4 (#186)
| Benchmark | GPT-5.5 Pro | o1-mini |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 100% | 46.9% |
| FrontierMath (Feb 2025 set) | 52.4% | 1.7% |
| FrontierMath (Tiers 1-3) | 87.7% | — |
| FrontierMath Tier 4 | 78% | — |
| LiveBench Math | — | 62% |
| LMArena Math | — | 1358 |
| MATH Level 5 | — | 89.2% |
| FrontierMath Tier 4 (v1) | 39.6% | — |
Knowledge GPT-5.5 Pro leads
GPT-5.5 Pro: 64.1 (#19), o1-mini: 34.9 (#192)
| Benchmark | GPT-5.5 Pro | o1-mini |
|---|---|---|
| GPQA Diamond | 93.9% | 62.4% |
| Confabulations | — | 18.6% |
| LMArena Expert | — | 1316 |
Multilingual Not comparable
GPT-5.5 Pro: —, o1-mini: 43.6 (#182)
| Benchmark | GPT-5.5 Pro | o1-mini |
|---|---|---|
| LMArena Non-English | — | 1289 |
| LMArena Chinese | — | 1314 |
| LMArena French | — | 1293 |
| LMArena German | — | 1278 |
| LMArena Japanese | — | 1245 |
| LMArena Korean | — | 1223 |
| LMArena Russian | — | 1283 |
| LMArena Spanish | — | 1303 |
Instruction Following Not comparable
GPT-5.5 Pro: —, o1-mini: 66.7 (#206)
| Benchmark | GPT-5.5 Pro | o1-mini |
|---|---|---|
| LiveBench Instruction Following | — | 65.4% |
| LMArena Instruction Following | — | 1304 |
Long Context Not comparable
GPT-5.5 Pro: —, o1-mini: 40.1 (#161)
| Benchmark | GPT-5.5 Pro | o1-mini |
|---|---|---|
| LMArena Longer Query | — | 1320 |
Writing & Preference Not comparable
GPT-5.5 Pro: —, o1-mini: 48.4 (#202)
| Benchmark | GPT-5.5 Pro | o1-mini |
|---|---|---|
| LMArena Text | — | 1317 |
| LMArena Creative Writing | — | 1244 |
| Short-Story Creative Writing | — | 64.9% |
| LMArena Multi-Turn | — | 1314 |
| LiveBench Language | — | 40.9% |
Frequently asked questions
Is GPT-5.5 Pro better than o1-mini?
GPT-5.5 Pro is the stronger model overall, scoring 64.3 to 34.0 on the Noometry Index.
How many benchmarks do GPT-5.5 Pro and o1-mini share?
7 benchmarks have published results for both models. GPT-5.5 Pro has 14 scored results on Noometry and o1-mini has 39.