Model comparison
GPT-5 vs Phi-4
GPT-5 is the stronger model overall, scoring 50.9 to 31.2 on the Noometry Index. Phi-4 costs 39× less per token, which makes it the better buy when GPT-5's lead doesn't matter for your workload.
Last verified . 26 shared benchmarks.
MicrosoftSummary
- They share 26 benchmarks with published results for both. GPT-5 scores higher in 9 categories and Phi-4 in 0 categories; 9 gaps are clear of the uncertainty.
- The widest gap is in math, where GPT-5 leads 55.0 to 20.8.
- The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 91.4% for GPT-5 and 13.8% for Phi-4.
- Phi-4 is cheaper at $0.07 / $0.14 per million input/output tokens, against $1.25 / $10 for GPT-5.
- GPT-5 accepts more context: 400K tokens versus 128K.
- Phi-4 has downloadable open weights; the other is API-only.
Side by side
| GPT-5 | Phi-4 | |
|---|---|---|
| Provider | OpenAI | Microsoft |
| Noometry Index | 50.9 | 31.2 |
| Released | 2025-08-07 | 2024-12-11 |
| Weights | Proprietary | Open |
| Context window | 400K | 128K |
| Max output | 128K | 4K |
| Input $ / M tokens | $1.25 | $0.07 |
| Output $ / M tokens | $10 | $0.14 |
| Results tracked | 69 | 37 |
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Category by category
Coding GPT-5 leads
GPT-5: 50.3 (#47), Phi-4: 34.4 (#239)
| Benchmark | GPT-5 | Phi-4 |
|---|---|---|
| LMArena Coding | 1436 | 1231 |
| SWE-bench Verified | 73.6% | — |
| SWE-bench Verified (bash only) | 65% | — |
| Aider Polyglot | 88% | — |
| LMArena WebDev | 1418 | — |
| SciCode | 42.9% | — |
| GSO | 6.9% | — |
| WeirdML | 60.7% | — |
| BigCodeBench Instruct | — | 45.5% |
| LiveBench Coding | — | 30.7% |
| BigCodeBench Complete | — | 55.4% |
| ALE-Bench | 1,162 | — |
| AlgoTune | 1.67 | — |
Agentic & Tool Use GPT-5 leads
GPT-5: 33.1 (#56), Phi-4: 22.8 (#128)
| Benchmark | GPT-5 | Phi-4 |
|---|---|---|
| BALROG | 32.8% | 11.6% |
| Terminal-Bench | 49.6% | — |
| Berkeley Function Calling Leaderboard | — | 28.8% |
| GDPval | 34.8% | — |
| Remote Labor Index | 1.7% | — |
| DeepResearch Bench | 49.6% | — |
| LMArena Search | 1133 | — |
| METR Time Horizons | 69.6% | — |
Reasoning GPT-5 leads
GPT-5: 38.3 (#64), Phi-4: 17.7 (#291)
| Benchmark | GPT-5 | Phi-4 |
|---|---|---|
| Chess Puzzles | 37% | 1% |
| LMArena Hard Prompts | 1416 | 1220 |
| Epoch Capabilities Index | 150 | 130.42 |
| ARC-AGI-2 | 9.9% | — |
| SimpleBench | 56.7% | — |
| Kagi LLM Benchmark | 72.7% | — |
| ARC-AGI-1 | 65.7% | — |
| CritPt | 12.6% | — |
| EnigmaEval | 10.5% | — |
| EBR-Bench | 12.7% | — |
| LiveBench Reasoning | — | 47.8% |
| Mystery Game Puzzles | 23% | — |
| DTBench | 90.7% | — |
| LiveBench Data Analysis | — | 45.2% |
| LMCA | 40% | — |
| ForecastBench | 61.4 | — |
| LiveBench | — | 41.6% |
Math GPT-5 leads
GPT-5: 55.0 (#44), Phi-4: 20.8 (#285)
| Benchmark | GPT-5 | Phi-4 |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 91.4% | 13.8% |
| LMArena Math | 1407 | 1246 |
| MATH Level 5 | 98.1% | 64.9% |
| FrontierMath (Tiers 1-3) | 55.4% | — |
| FrontierMath Tier 4 | 22% | — |
| ProofBench | 18% | — |
| Omni-MATH | 64.7% | — |
| LiveBench Math | — | 42% |
| FrontierMath (Feb 2025 set) | 32.4% | — |
| FrontierMath Tier 4 (v1) | 12.5% | — |
Knowledge GPT-5 leads
GPT-5: 56.6 (#43), Phi-4: 32.6 (#209)
| Benchmark | GPT-5 | Phi-4 |
|---|---|---|
| GPQA Diamond | 86.2% | 56.1% |
| Confabulations | 10.3% | 29.4% |
| Vectara Hallucination Rate | 14.7% | 3.7% |
| LMArena Expert | 1419 | 1203 |
| Humanity's Last Exam | 25.3% | — |
| SimpleQA Verified | 50.1% | — |
| MMLU-Pro | 86.3% | — |
| GPQA (HELM) | 79.2% | — |
| MMLU | — | 84.8% |
Multimodal Not comparable
GPT-5: 46.8 (#13), Phi-4: —
| Benchmark | GPT-5 | Phi-4 |
|---|---|---|
| LMArena Vision | 1232 | — |
| GeoBench | 81% | — |
| VPCT | 66% | — |
Multilingual GPT-5 leads
GPT-5: 51.4 (#110), Phi-4: 37.2 (#237)
| Benchmark | GPT-5 | Phi-4 |
|---|---|---|
| LMArena Non-English | 1397 | 1197 |
| LMArena Chinese | 1422 | 1212 |
| LMArena French | 1410 | 1224 |
| LMArena German | 1416 | 1222 |
| LMArena Japanese | 1409 | 1158 |
| LMArena Korean | 1360 | 1151 |
| LMArena Russian | 1406 | 1209 |
| LMArena Spanish | 1399 | 1234 |
Instruction Following GPT-5 leads
GPT-5: 73.8 (#113), Phi-4: 60.4 (#251)
| Benchmark | GPT-5 | Phi-4 |
|---|---|---|
| LMArena Instruction Following | 1388 | 1201 |
| LiveBench Instruction Following | — | 58.4% |
| IFEval | 87.5% | — |
Long Context GPT-5 leads
GPT-5: 69.5 (#2), Phi-4: 36.9 (#226)
| Benchmark | GPT-5 | Phi-4 |
|---|---|---|
| LMArena Longer Query | 1399 | 1217 |
| Fiction.LiveBench | 97.2% | — |
Writing & Preference GPT-5 leads
GPT-5: 63.4 (#65), Phi-4: 40.5 (#244)
| Benchmark | GPT-5 | Phi-4 |
|---|---|---|
| LMArena Text | 1406 | 1217 |
| LMArena Creative Writing | 1365 | 1182 |
| Short-Story Creative Writing | 86% | 62.6% |
| LMArena Multi-Turn | 1426 | 1206 |
| EQ-Bench Creative Writing | 1627 | — |
| WildBench | 85.7% | — |
| LiveBench Language | — | 25.6% |
Frequently asked questions
Is GPT-5 better than Phi-4?
GPT-5 is the stronger model overall, scoring 50.9 to 31.2 on the Noometry Index. Phi-4 costs 39× less per token, which makes it the better buy when GPT-5's lead doesn't matter for your workload.
Which is cheaper, GPT-5 or Phi-4?
Phi-4 is cheaper. It lists at $0.07 per million input tokens and $0.14 per million output tokens; GPT-5 lists at $1.25 and $10.
Is GPT-5 or Phi-4 better for coding?
GPT-5 scores higher on coding benchmarks: 50.3 versus 34.4 in the Noometry coding category.
Which has the bigger context window?
GPT-5 does, with 400K tokens against 128K.
How many benchmarks do GPT-5 and Phi-4 share?
26 benchmarks have published results for both models. GPT-5 has 69 scored results on Noometry and Phi-4 has 37.