Model comparison
Mercury 2.5 vs Phi 3 Medium 4k Instruct
Phi 3 Medium 4k Instruct has enough public results to be ranked (#246); Mercury 2.5 does not yet, so treat this comparison as directional.
Last verified . 0 shared benchmarks.
MicrosoftSummary
- The widest gap is in math, where Phi 3 Medium 4k Instruct leads 30.9 to 22.4.
- Phi 3 Medium 4k Instruct has downloadable open weights; the other is API-only.
Side by side
| Mercury 2.5 | Phi 3 Medium 4k Instruct | |
|---|---|---|
| Provider | Inception | Microsoft |
| Noometry Index | 30.2 | 32.4 |
| Released | 2026-09-08 | — |
| Weights | Proprietary | Open |
| Context window | 260K | — |
| Max output | 66K | — |
| Input $ / M tokens | $0.04 | — |
| Output $ / M tokens | $0.15 | — |
| Results tracked | 2 | 17 |
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Category by category
Coding Not comparable
Mercury 2.5: —, Phi 3 Medium 4k Instruct: 32.3 (#263)
| Benchmark | Mercury 2.5 | Phi 3 Medium 4k Instruct |
|---|---|---|
| LMArena Coding | — | 1130 |
| ALE-Bench | 301.65 | — |
Reasoning Not comparable
Mercury 2.5: —, Phi 3 Medium 4k Instruct: 20.8 (#214)
| Benchmark | Mercury 2.5 | Phi 3 Medium 4k Instruct |
|---|---|---|
| LMArena Hard Prompts | — | 1127 |
Math Phi 3 Medium 4k Instruct leads
Mercury 2.5: 22.4, Phi 3 Medium 4k Instruct: 30.9 (#202)
| Benchmark | Mercury 2.5 | Phi 3 Medium 4k Instruct |
|---|---|---|
| ProofBench | 3% | — |
| LMArena Math | — | 1173 |
Knowledge Not comparable
Mercury 2.5: —, Phi 3 Medium 4k Instruct: 29.6 (#226)
| Benchmark | Mercury 2.5 | Phi 3 Medium 4k Instruct |
|---|---|---|
| LMArena Expert | — | 1108 |
Multilingual Not comparable
Mercury 2.5: —, Phi 3 Medium 4k Instruct: 30.8 (#258)
| Benchmark | Mercury 2.5 | Phi 3 Medium 4k Instruct |
|---|---|---|
| LMArena Non-English | — | 1094 |
| LMArena Chinese | — | 1108 |
| LMArena French | — | 1109 |
| LMArena German | — | 1101 |
| LMArena Japanese | — | 1042 |
| LMArena Korean | — | 954 |
| LMArena Russian | — | 1145 |
| LMArena Spanish | — | 1095 |
Instruction Following Not comparable
Mercury 2.5: —, Phi 3 Medium 4k Instruct: 57.8 (#263)
| Benchmark | Mercury 2.5 | Phi 3 Medium 4k Instruct |
|---|---|---|
| LMArena Instruction Following | — | 1114 |
Long Context Not comparable
Mercury 2.5: —, Phi 3 Medium 4k Instruct: 33.9 (#250)
| Benchmark | Mercury 2.5 | Phi 3 Medium 4k Instruct |
|---|---|---|
| LMArena Longer Query | — | 1120 |
Writing & Preference Not comparable
Mercury 2.5: —, Phi 3 Medium 4k Instruct: 34.3 (#267)
| Benchmark | Mercury 2.5 | Phi 3 Medium 4k Instruct |
|---|---|---|
| LMArena Text | — | 1138 |
| LMArena Creative Writing | — | 1106 |
| LMArena Multi-Turn | — | 1088 |
Frequently asked questions
Is Mercury 2.5 better than Phi 3 Medium 4k Instruct?
Phi 3 Medium 4k Instruct has enough public results to be ranked (#246); Mercury 2.5 does not yet, so treat this comparison as directional.
How many benchmarks do Mercury 2.5 and Phi 3 Medium 4k Instruct share?
0 benchmarks have published results for both models. Mercury 2.5 has 2 scored results on Noometry and Phi 3 Medium 4k Instruct has 17.