Model comparison
GPT-5.5 Pro vs Phi 3 Mini 128k Instruct
GPT-5.5 Pro is the stronger model overall, scoring 64.3 to 29.1 on the Noometry Index.
Last verified . 0 shared benchmarks.
MicrosoftSummary
- The widest gap is in reasoning, where GPT-5.5 Pro leads 73.6 to 18.7.
- Phi 3 Mini 128k Instruct has downloadable open weights; the other is API-only.
Side by side
| GPT-5.5 Pro | Phi 3 Mini 128k Instruct | |
|---|---|---|
| Provider | OpenAI | Microsoft |
| Noometry Index | 64.3 | 29.1 |
| 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 | 19 |
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Category by category
Coding Not comparable
GPT-5.5 Pro: —, Phi 3 Mini 128k Instruct: 28.3 (#307)
| Benchmark | GPT-5.5 Pro | Phi 3 Mini 128k Instruct |
|---|---|---|
| BigCodeBench Instruct | — | 29.6% |
| LMArena Coding | — | 1040 |
| BigCodeBench Complete | — | 40.6% |
Reasoning GPT-5.5 Pro leads
GPT-5.5 Pro: 73.6 (#7), Phi 3 Mini 128k Instruct: 18.7 (#254)
| Benchmark | GPT-5.5 Pro | Phi 3 Mini 128k Instruct |
|---|---|---|
| ARC-AGI-2 | 84.6% | — |
| SimpleBench | 76.9% | — |
| ARC-AGI-1 | 96.5% | — |
| CritPt | 30.6% | — |
| Chess Puzzles | 64% | — |
| LMArena Hard Prompts | — | 1028 |
| DTBench | 96% | — |
| LMCA | 53.9% | — |
| Epoch Capabilities Index | 162.45 | — |
Math GPT-5.5 Pro leads
GPT-5.5 Pro: 83.8 (#8), Phi 3 Mini 128k Instruct: 29.2 (#220)
| Benchmark | GPT-5.5 Pro | Phi 3 Mini 128k Instruct |
|---|---|---|
| FrontierMath (Tiers 1-3) | 87.7% | — |
| FrontierMath Tier 4 | 78% | — |
| OTIS Mock AIME 2024-2025 | 100% | — |
| LMArena Math | — | 1089 |
| FrontierMath (Feb 2025 set) | 52.4% | — |
| FrontierMath Tier 4 (v1) | 39.6% | — |
Knowledge GPT-5.5 Pro leads
GPT-5.5 Pro: 64.2 (#17), Phi 3 Mini 128k Instruct: 26.3 (#251)
| Benchmark | GPT-5.5 Pro | Phi 3 Mini 128k Instruct |
|---|---|---|
| GPQA Diamond | 93.9% | — |
| LMArena Expert | — | 984 |
Multilingual Not comparable
GPT-5.5 Pro: —, Phi 3 Mini 128k Instruct: 25.4 (#280)
| Benchmark | GPT-5.5 Pro | Phi 3 Mini 128k Instruct |
|---|---|---|
| LMArena Non-English | — | 1000 |
| LMArena Chinese | — | 1016 |
| LMArena French | — | 1038 |
| LMArena German | — | 1006 |
| LMArena Japanese | — | 899 |
| LMArena Korean | — | 856 |
| LMArena Russian | — | 1004 |
| LMArena Spanish | — | 1058 |
Instruction Following Not comparable
GPT-5.5 Pro: —, Phi 3 Mini 128k Instruct: 52.1 (#289)
| Benchmark | GPT-5.5 Pro | Phi 3 Mini 128k Instruct |
|---|---|---|
| LMArena Instruction Following | — | 1023 |
Long Context Not comparable
GPT-5.5 Pro: —, Phi 3 Mini 128k Instruct: 30.3 (#284)
| Benchmark | GPT-5.5 Pro | Phi 3 Mini 128k Instruct |
|---|---|---|
| LMArena Longer Query | — | 996 |
Writing & Preference Not comparable
GPT-5.5 Pro: —, Phi 3 Mini 128k Instruct: 27.3 (#296)
| Benchmark | GPT-5.5 Pro | Phi 3 Mini 128k Instruct |
|---|---|---|
| LMArena Text | — | 1050 |
| LMArena Creative Writing | — | 1024 |
| LMArena Multi-Turn | — | 989 |
Frequently asked questions
Is GPT-5.5 Pro better than Phi 3 Mini 128k Instruct?
GPT-5.5 Pro is the stronger model overall, scoring 64.3 to 29.1 on the Noometry Index.
How many benchmarks do GPT-5.5 Pro and Phi 3 Mini 128k Instruct share?
0 benchmarks have published results for both models. GPT-5.5 Pro has 14 scored results on Noometry and Phi 3 Mini 128k Instruct has 19.