Model comparison
o3-pro vs Phi 3 Medium 4k Instruct
o3-pro is the stronger model overall, scoring 42.9 to 33.0 on the Noometry Index.
Last verified . 0 shared benchmarks.
MicrosoftSummary
- The widest gap is in long context, where o3-pro leads 72.2 to 34.0.
- Phi 3 Medium 4k Instruct has downloadable open weights; the other is API-only.
Side by side
| o3-pro | Phi 3 Medium 4k Instruct | |
|---|---|---|
| Provider | OpenAI | Microsoft |
| Noometry Index | 42.9 | 33.0 |
| Released | 2025-06-10 | — |
| Weights | Proprietary | Open |
| Context window | 200K | — |
| Max output | 100K | — |
| Input $ / M tokens | $20 | — |
| Output $ / M tokens | $80 | — |
| Results tracked | 12 | 17 |
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Category by category
Coding o3-pro leads
o3-pro: 55.5 (#24), Phi 3 Medium 4k Instruct: 32.9 (#268)
| Benchmark | o3-pro | Phi 3 Medium 4k Instruct |
|---|---|---|
| Aider Polyglot | 84.9% | — |
| WeirdML | 58.2% | — |
| LMArena Coding | — | 1130 |
Reasoning o3-pro leads
o3-pro: 23.8 (#171), Phi 3 Medium 4k Instruct: 21.7 (#214)
| Benchmark | o3-pro | Phi 3 Medium 4k Instruct |
|---|---|---|
| ARC-AGI-2 | 4.9% | — |
| Kagi LLM Benchmark | 72.1% | — |
| ARC-AGI-1 | 59.3% | — |
| LMArena Hard Prompts | — | 1127 |
| DTBench | 86.9% | — |
| LMCA | 38.5% | — |
| Epoch Capabilities Index | 147.42 | — |
Math Not comparable
o3-pro: —, Phi 3 Medium 4k Instruct: 33.4 (#202)
| Benchmark | o3-pro | Phi 3 Medium 4k Instruct |
|---|---|---|
| LMArena Math | — | 1173 |
Knowledge Too close to call
o3-pro: 29.5 (#238), Phi 3 Medium 4k Instruct: 30.2 (#229)
| Benchmark | o3-pro | Phi 3 Medium 4k Instruct |
|---|---|---|
| Confabulations | 14.2% | — |
| Vectara Hallucination Rate | 23.3% | — |
| LMArena Expert | — | 1108 |
Multilingual Not comparable
o3-pro: —, Phi 3 Medium 4k Instruct: 30.6 (#263)
| Benchmark | o3-pro | Phi 3 Medium 4k Instruct |
|---|---|---|
| LMArena Non-English | — | 1094 |
| LMArena Chinese | — | 1108 |
| LMArena French | — | 1110 |
| LMArena German | — | 1101 |
| LMArena Japanese | — | 1042 |
| LMArena Korean | — | 954 |
| LMArena Russian | — | 1145 |
| LMArena Spanish | — | 1095 |
Instruction Following Not comparable
o3-pro: —, Phi 3 Medium 4k Instruct: 57.6 (#268)
| Benchmark | o3-pro | Phi 3 Medium 4k Instruct |
|---|---|---|
| LMArena Instruction Following | — | 1113 |
Long Context o3-pro leads
o3-pro: 72.2 (#1), Phi 3 Medium 4k Instruct: 34.0 (#255)
| Benchmark | o3-pro | Phi 3 Medium 4k Instruct |
|---|---|---|
| Fiction.LiveBench | 97.2% | — |
| LMArena Longer Query | — | 1120 |
Writing & Preference o3-pro leads
o3-pro: 57.1 (#133), Phi 3 Medium 4k Instruct: 34.1 (#272)
| Benchmark | o3-pro | Phi 3 Medium 4k Instruct |
|---|---|---|
| LMArena Text | — | 1138 |
| LMArena Creative Writing | — | 1107 |
| Short-Story Creative Writing | 84.4% | — |
| LMArena Multi-Turn | — | 1088 |
Frequently asked questions
Is o3-pro better than Phi 3 Medium 4k Instruct?
o3-pro is the stronger model overall, scoring 42.9 to 33.0 on the Noometry Index.
Is o3-pro or Phi 3 Medium 4k Instruct better for coding?
o3-pro scores higher on coding benchmarks: 55.5 versus 32.9 in the Noometry coding category.
How many benchmarks do o3-pro and Phi 3 Medium 4k Instruct share?
0 benchmarks have published results for both models. o3-pro has 12 scored results on Noometry and Phi 3 Medium 4k Instruct has 17.