Model comparison
o4-mini vs Phi-4
o4-mini is the stronger model overall, scoring 41.6 to 30.9 on the Noometry Index. Phi-4 costs 22× less per token, which makes it the better buy when o4-mini's lead doesn't matter for your workload.
Last verified . 26 shared benchmarks.
MicrosoftSummary
- They share 26 benchmarks with published results for both. o4-mini 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 o4-mini leads 40.2 to 19.6.
- The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 81.7% for o4-mini and 13.8% for Phi-4.
- Phi-4 is cheaper at $0.07 / $0.14 per million input/output tokens, against $1.10 / $4.40 for o4-mini.
- o4-mini accepts more context: 200K tokens versus 128K.
- Phi-4 has downloadable open weights; the other is API-only.
Side by side
| o4-mini | Phi-4 | |
|---|---|---|
| Provider | OpenAI | Microsoft |
| Noometry Index | 41.6 | 30.9 |
| Released | 2025-04-16 | 2024-12-11 |
| Weights | Proprietary | Open |
| Context window | 200K | 128K |
| Max output | 100K | 4K |
| Input $ / M tokens | $1.10 | $0.07 |
| Output $ / M tokens | $4.40 | $0.14 |
| Results tracked | 60 | 37 |
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Category by category
Coding o4-mini leads
o4-mini: 41.6 (#110), Phi-4: 33.8 (#237)
| Benchmark | o4-mini | Phi-4 |
|---|---|---|
| LMArena Coding | 1369 | 1231 |
| SWE-bench Verified (bash only) | 45% | — |
| Aider Polyglot | 72% | — |
| GSO | 3.6% | — |
| WeirdML | 52.6% | — |
| BigCodeBench Instruct | — | 45.5% |
| LiveBench Coding | — | 30.7% |
| BigCodeBench Complete | — | 55.4% |
| CadEval | 62% | — |
| ALE-Bench | 826.17 | — |
| AlgoTune | 1.72 | — |
Agentic & Tool Use o4-mini leads
o4-mini: 32.3 (#57), Phi-4: 22.6 (#120)
| Benchmark | o4-mini | Phi-4 |
|---|---|---|
| Berkeley Function Calling Leaderboard | 53.2% | 28.8% |
| GDPval | 25.3% | — |
| BALROG | — | 11.6% |
| METR Time Horizons | 63.9% | — |
Reasoning o4-mini leads
o4-mini: 24.6 (#143), Phi-4: 17.0 (#287)
| Benchmark | o4-mini | Phi-4 |
|---|---|---|
| Chess Puzzles | 26% | 1% |
| LMArena Hard Prompts | 1351 | 1220 |
| Epoch Capabilities Index | 145.63 | 130.43 |
| ARC-AGI-2 | 6.1% | — |
| SimpleBench | 38.7% | — |
| Kagi LLM Benchmark | 67.6% | — |
| ARC-AGI-1 | 58.7% | — |
| CritPt | 0.6% | — |
| EnigmaEval | 9.2% | — |
| LiveBench Reasoning | — | 47.8% |
| Mystery Game Puzzles | 5% | — |
| DTBench | 77.6% | — |
| LiveBench Data Analysis | — | 45.2% |
| LMCA | 26.5% | — |
| ForecastBench | 61.8 | — |
| LiveBench | — | 41.6% |
Math o4-mini leads
o4-mini: 40.2 (#79), Phi-4: 19.6 (#279)
| Benchmark | o4-mini | Phi-4 |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 81.7% | 13.8% |
| LMArena Math | 1390 | 1246 |
| MATH Level 5 | 97.8% | 64.9% |
| FrontierMath (Tiers 1-3) | 36.1% | — |
| FrontierMath Tier 4 | 4.9% | — |
| Omni-MATH | 72% | — |
| LiveBench Math | — | 42% |
| FrontierMath (Feb 2025 set) | 24.8% | — |
| FrontierMath Tier 4 (v1) | 6.3% | — |
Knowledge o4-mini leads
o4-mini: 43.5 (#83), Phi-4: 32.5 (#204)
| Benchmark | o4-mini | Phi-4 |
|---|---|---|
| GPQA Diamond | 79.6% | 56.1% |
| Confabulations | 15.8% | 29.4% |
| Vectara Hallucination Rate | 18.6% | 3.7% |
| LMArena Expert | 1344 | 1203 |
| Humanity's Last Exam | 18.1% | — |
| SimpleQA Verified | 19.6% | — |
| MMLU-Pro | 82% | — |
| GPQA (HELM) | 73.5% | — |
| MMLU | — | 84.8% |
Multimodal Not comparable
o4-mini: 39.5 (#46), Phi-4: —
| Benchmark | o4-mini | Phi-4 |
|---|---|---|
| LMArena Vision | 1194 | — |
| GeoBench | 64% | — |
| VPCT | 57.5% | — |
Multilingual o4-mini leads
o4-mini: 47.2 (#149), Phi-4: 37.4 (#232)
| Benchmark | o4-mini | Phi-4 |
|---|---|---|
| LMArena Non-English | 1336 | 1197 |
| LMArena Chinese | 1355 | 1211 |
| LMArena French | 1362 | 1223 |
| LMArena German | 1336 | 1222 |
| LMArena Japanese | 1308 | 1158 |
| LMArena Korean | 1313 | 1151 |
| LMArena Russian | 1334 | 1209 |
| LMArena Spanish | 1346 | 1234 |
Instruction Following o4-mini leads
o4-mini: 75.4 (#63), Phi-4: 60.6 (#246)
| Benchmark | o4-mini | Phi-4 |
|---|---|---|
| LMArena Instruction Following | 1321 | 1201 |
| LiveBench Instruction Following | — | 58.4% |
| IFEval | 92.8% | — |
Long Context o4-mini leads
o4-mini: 45.5 (#31), Phi-4: 36.9 (#221)
| Benchmark | o4-mini | Phi-4 |
|---|---|---|
| LMArena Longer Query | 1315 | 1217 |
| Fiction.LiveBench | 77.8% | — |
Writing & Preference o4-mini leads
o4-mini: 54.2 (#148), Phi-4: 40.7 (#239)
| Benchmark | o4-mini | Phi-4 |
|---|---|---|
| LMArena Text | 1353 | 1217 |
| LMArena Creative Writing | 1294 | 1182 |
| Short-Story Creative Writing | 75% | 62.6% |
| LMArena Multi-Turn | 1350 | 1206 |
| WildBench | 85.4% | — |
| LiveBench Language | — | 25.6% |
Frequently asked questions
Is o4-mini better than Phi-4?
o4-mini is the stronger model overall, scoring 41.6 to 30.9 on the Noometry Index. Phi-4 costs 22× less per token, which makes it the better buy when o4-mini's lead doesn't matter for your workload.
Which is cheaper, o4-mini or Phi-4?
Phi-4 is cheaper. It lists at $0.07 per million input tokens and $0.14 per million output tokens; o4-mini lists at $1.10 and $4.40.
Is o4-mini or Phi-4 better for coding?
o4-mini scores higher on coding benchmarks: 41.6 versus 33.8 in the Noometry coding category.
Which has the bigger context window?
o4-mini does, with 200K tokens against 128K.
How many benchmarks do o4-mini and Phi-4 share?
26 benchmarks have published results for both models. o4-mini has 60 scored results on Noometry and Phi-4 has 37.