Model comparison
GPT-5.5 Pro vs phi-3-medium 14B
GPT-5.5 Pro is the stronger model overall, scoring 64.3 to 29.7 on the Noometry Index.
Last verified . 2 shared benchmarks.
MicrosoftSummary
- They share 2 benchmarks with published results for both. GPT-5.5 Pro scores higher in 2 categories and phi-3-medium 14B in 0 categories; 2 gaps are clear of the uncertainty.
- The widest gap is in math, where GPT-5.5 Pro leads 84.0 to 27.3.
- The biggest single-benchmark swing is GPQA Diamond: 93.9% for GPT-5.5 Pro and 27.6% for phi-3-medium 14B.
- phi-3-medium 14B has downloadable open weights; the other is API-only.
Side by side
| GPT-5.5 Pro | phi-3-medium 14B | |
|---|---|---|
| Provider | OpenAI | Microsoft |
| Noometry Index | 64.3 | 29.7 |
| Released | 2026-04-23 | 2024-04-23 |
| Weights | Proprietary | Open |
| Context window | 1.05M | — |
| Max output | 128K | — |
| Input $ / M tokens | $30 | — |
| Output $ / M tokens | $180 | — |
| Results tracked | 14 | 13 |
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Category by category
Coding Not comparable
GPT-5.5 Pro: —, phi-3-medium 14B: 36.8 (#201)
| Benchmark | GPT-5.5 Pro | phi-3-medium 14B |
|---|---|---|
| BigCodeBench Instruct | — | 37.6% |
| BigCodeBench Complete | — | 48.7% |
Reasoning Not comparable
GPT-5.5 Pro: 73.3 (#10), phi-3-medium 14B: —
| Benchmark | GPT-5.5 Pro | phi-3-medium 14B |
|---|---|---|
| Epoch Capabilities Index | 162.07 | 121.23 |
| ARC-AGI-2 | 84.6% | — |
| SimpleBench | 76.9% | — |
| ARC-AGI-1 | 96.5% | — |
| CritPt | 30.6% | — |
| Chess Puzzles | 64% | — |
| DTBench | 96% | — |
| LMCA | 53.9% | — |
| Adversarial NLI | — | 55.8% |
| BIG-Bench Hard | — | 81.4% |
| HellaSwag | — | 82.4% |
| WinoGrande | — | 81.5% |
Math GPT-5.5 Pro leads
GPT-5.5 Pro: 84.0 (#10), phi-3-medium 14B: 27.3 (#250)
| Benchmark | GPT-5.5 Pro | phi-3-medium 14B |
|---|---|---|
| FrontierMath (Tiers 1-3) | 87.7% | — |
| FrontierMath Tier 4 | 78% | — |
| OTIS Mock AIME 2024-2025 | 100% | — |
| MATH Level 5 | — | 17.6% |
| 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), phi-3-medium 14B: 9.1 (#306)
| Benchmark | GPT-5.5 Pro | phi-3-medium 14B |
|---|---|---|
| GPQA Diamond | 93.9% | 27.6% |
| ARC (AI2) Challenge | — | 91.6% |
| MMLU | — | 78% |
| OpenBookQA | — | 87.4% |
| TriviaQA | — | 73.9% |
Frequently asked questions
Is GPT-5.5 Pro better than phi-3-medium 14B?
GPT-5.5 Pro is the stronger model overall, scoring 64.3 to 29.7 on the Noometry Index.
How many benchmarks do GPT-5.5 Pro and phi-3-medium 14B share?
2 benchmarks have published results for both models. GPT-5.5 Pro has 14 scored results on Noometry and phi-3-medium 14B has 13.