Model comparison
GPT-5 Mini vs Phi 3 Mini 128k Instruct
GPT-5 Mini is the stronger model overall, scoring 41.8 to 29.7 on the Noometry Index.
Last verified . 17 shared benchmarks.
MicrosoftSummary
- They share 17 benchmarks with published results for both. GPT-5 Mini scores higher in 8 categories and Phi 3 Mini 128k Instruct in 0 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in writing & preference, where GPT-5 Mini leads 55.2 to 27.1.
- Phi 3 Mini 128k Instruct has downloadable open weights; the other is API-only.
Side by side
| GPT-5 Mini | Phi 3 Mini 128k Instruct | |
|---|---|---|
| Provider | OpenAI | Microsoft |
| Noometry Index | 41.8 | 29.7 |
| Released | 2025-08-07 | 2024-04-23 |
| Weights | Proprietary | Open |
| Context window | 400K | — |
| Max output | 128K | — |
| Input $ / M tokens | $0.25 | — |
| Output $ / M tokens | $2 | — |
| Results tracked | 60 | 19 |
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Category by category
Coding GPT-5 Mini leads
GPT-5 Mini: 40.1 (#146), Phi 3 Mini 128k Instruct: 28.8 (#312)
| Benchmark | GPT-5 Mini | Phi 3 Mini 128k Instruct |
|---|---|---|
| LMArena Coding | 1406 | 1039 |
| SWE-bench Verified | 64.7% | — |
| SWE-bench Verified (bash only) | 59.8% | — |
| SWE-bench Multilingual | 39.7% | — |
| SciCode | 39.2% | — |
| WeirdML | 52.7% | — |
| BigCodeBench Instruct | — | 29.6% |
| BigCodeBench Complete | — | 40.6% |
| ALE-Bench | 799.77 | — |
| AlgoTune | 1.38 | — |
Agentic & Tool Use Not comparable
GPT-5 Mini: 31.1 (#70), Phi 3 Mini 128k Instruct: —
| Benchmark | GPT-5 Mini | Phi 3 Mini 128k Instruct |
|---|---|---|
| Terminal-Bench | 34.8% | — |
| Berkeley Function Calling Leaderboard | 55.5% | — |
| Vending-Bench 2 | -31.18 | — |
Reasoning GPT-5 Mini leads
GPT-5 Mini: 23.9 (#168), Phi 3 Mini 128k Instruct: 19.6 (#256)
| Benchmark | GPT-5 Mini | Phi 3 Mini 128k Instruct |
|---|---|---|
| LMArena Hard Prompts | 1380 | 1028 |
| ARC-AGI-2 | 4.4% | — |
| Kagi LLM Benchmark | 70.3% | — |
| ARC-AGI-1 | 54.3% | — |
| CritPt | 0% | — |
| Chess Puzzles | 30% | — |
| EnigmaEval | 8.2% | — |
| Mystery Game Puzzles | 10% | — |
| DTBench | 80.5% | — |
| LMCA | 34.2% | — |
| Epoch Capabilities Index | 145.52 | — |
| ForecastBench | 61 | — |
Math GPT-5 Mini leads
GPT-5 Mini: 46.7 (#69), Phi 3 Mini 128k Instruct: 31.6 (#222)
| Benchmark | GPT-5 Mini | Phi 3 Mini 128k Instruct |
|---|---|---|
| LMArena Math | 1378 | 1089 |
| FrontierMath (Tiers 1-3) | 46.7% | — |
| FrontierMath Tier 4 | 12.2% | — |
| OTIS Mock AIME 2024-2025 | 86.7% | — |
| ProofBench | 9% | — |
| Omni-MATH | 72.2% | — |
| MATH Level 5 | 97.8% | — |
| FrontierMath (Feb 2025 set) | 27.2% | — |
| FrontierMath Tier 4 (v1) | 6.3% | — |
Knowledge GPT-5 Mini leads
GPT-5 Mini: 45.6 (#86), Phi 3 Mini 128k Instruct: 26.8 (#254)
| Benchmark | GPT-5 Mini | Phi 3 Mini 128k Instruct |
|---|---|---|
| LMArena Expert | 1379 | 984 |
| GPQA Diamond | 75% | — |
| Humanity's Last Exam | 19.4% | — |
| SimpleQA Verified | 21.6% | — |
| MMLU-Pro | 83.5% | — |
| Confabulations | 13.3% | — |
| Vectara Hallucination Rate | 12.9% | — |
| GPQA (HELM) | 75.6% | — |
Multimodal Not comparable
GPT-5 Mini: 35.6 (#85), Phi 3 Mini 128k Instruct: —
| Benchmark | GPT-5 Mini | Phi 3 Mini 128k Instruct |
|---|---|---|
| LMArena Vision | 1202 | — |
| VPCT | 40.2% | — |
Multilingual GPT-5 Mini leads
GPT-5 Mini: 48.9 (#137), Phi 3 Mini 128k Instruct: 25.2 (#285)
| Benchmark | GPT-5 Mini | Phi 3 Mini 128k Instruct |
|---|---|---|
| LMArena Non-English | 1363 | 1000 |
| LMArena Chinese | 1385 | 1016 |
| LMArena French | 1386 | 1039 |
| LMArena German | 1366 | 1006 |
| LMArena Japanese | 1341 | 899 |
| LMArena Korean | 1308 | 856 |
| LMArena Russian | 1362 | 1004 |
| LMArena Spanish | 1355 | 1059 |
Instruction Following GPT-5 Mini leads
GPT-5 Mini: 76.2 (#46), Phi 3 Mini 128k Instruct: 51.8 (#294)
| Benchmark | GPT-5 Mini | Phi 3 Mini 128k Instruct |
|---|---|---|
| LMArena Instruction Following | 1357 | 1023 |
| IFEval | 92.7% | — |
Long Context GPT-5 Mini leads
GPT-5 Mini: 41.9 (#132), Phi 3 Mini 128k Instruct: 30.4 (#289)
| Benchmark | GPT-5 Mini | Phi 3 Mini 128k Instruct |
|---|---|---|
| LMArena Longer Query | 1355 | 996 |
| Fiction.LiveBench | 69.4% | — |
Writing & Preference GPT-5 Mini leads
GPT-5 Mini: 55.2 (#148), Phi 3 Mini 128k Instruct: 27.1 (#301)
| Benchmark | GPT-5 Mini | Phi 3 Mini 128k Instruct |
|---|---|---|
| LMArena Text | 1373 | 1050 |
| LMArena Creative Writing | 1325 | 1024 |
| LMArena Multi-Turn | 1363 | 989 |
| Short-Story Creative Writing | 83.1% | — |
| EQ-Bench Creative Writing | 1313 | — |
| WildBench | 85.5% | — |
Frequently asked questions
Is GPT-5 Mini better than Phi 3 Mini 128k Instruct?
GPT-5 Mini is the stronger model overall, scoring 41.8 to 29.7 on the Noometry Index.
Is GPT-5 Mini or Phi 3 Mini 128k Instruct better for coding?
GPT-5 Mini scores higher on coding benchmarks: 40.1 versus 28.8 in the Noometry coding category.
How many benchmarks do GPT-5 Mini and Phi 3 Mini 128k Instruct share?
17 benchmarks have published results for both models. GPT-5 Mini has 60 scored results on Noometry and Phi 3 Mini 128k Instruct has 19.