# Mercury 2.5 vs Phi 3 Medium 4k Instruct

> Mercury 2.5 and Phi 3 Medium 4k Instruct score almost the same on the Noometry Index (33.5 vs 33.0), so choose on price, context window or the category you care about most.

- Canonical page: https://noometry.com/compare/mercury-2-5-vs-phi-3-medium-4k-instruct
- Last updated: 2026-10-11
- Shared benchmarks: 0

## Summary

- The widest gap is in math, where Phi 3 Medium 4k Instruct leads 33.4 to 23.3.
- Phi 3 Medium 4k Instruct has downloadable open weights; the other is API-only.

## Snapshot

| | Mercury 2.5 | Phi 3 Medium 4k Instruct |
|---|---|---|
| Provider | Inception | Microsoft |
| Noometry Index | 33.5 | 33.0 |
| Rank | 242 | 250 |
| Context | 260K | — |
| Input $/M | $0.04 | — |
| Output $/M | $0.15 | — |
| Weights | Proprietary | Open |

## Coding

- Mercury 2.5: 39.5 (#156)
- Phi 3 Medium 4k Instruct: 32.9 (#268)

| Benchmark | Mercury 2.5 | Phi 3 Medium 4k Instruct |
|---|---|---|
| SciCode | 38.5% | — |
| LMArena Coding | — | 1130 |
| ALE-Bench | 301.65 | — |

## Reasoning

- Mercury 2.5: 22.4 (#193)
- Phi 3 Medium 4k Instruct: 21.7 (#214)

| Benchmark | Mercury 2.5 | Phi 3 Medium 4k Instruct |
|---|---|---|
| CritPt | 0% | — |
| LMArena Hard Prompts | — | 1127 |

## Math

- Mercury 2.5: 23.3 (#272)
- Phi 3 Medium 4k Instruct: 33.4 (#202)

| Benchmark | Mercury 2.5 | Phi 3 Medium 4k Instruct |
|---|---|---|
| ProofBench | 3% | — |
| LMArena Math | — | 1173 |

## Knowledge

- Mercury 2.5: —
- Phi 3 Medium 4k Instruct: 30.2 (#229)

| Benchmark | Mercury 2.5 | Phi 3 Medium 4k Instruct |
|---|---|---|
| LMArena Expert | — | 1108 |

## Multilingual

- Mercury 2.5: —
- Phi 3 Medium 4k Instruct: 30.6 (#263)

| Benchmark | Mercury 2.5 | 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

- Mercury 2.5: —
- Phi 3 Medium 4k Instruct: 57.6 (#268)

| Benchmark | Mercury 2.5 | Phi 3 Medium 4k Instruct |
|---|---|---|
| LMArena Instruction Following | — | 1113 |

## Long Context

- Mercury 2.5: —
- Phi 3 Medium 4k Instruct: 34.0 (#255)

| Benchmark | Mercury 2.5 | Phi 3 Medium 4k Instruct |
|---|---|---|
| LMArena Longer Query | — | 1120 |

## Writing & Preference

- Mercury 2.5: —
- Phi 3 Medium 4k Instruct: 34.1 (#272)

| Benchmark | Mercury 2.5 | Phi 3 Medium 4k Instruct |
|---|---|---|
| LMArena Text | — | 1138 |
| LMArena Creative Writing | — | 1107 |
| LMArena Multi-Turn | — | 1088 |

## FAQ

### Is Mercury 2.5 better than Phi 3 Medium 4k Instruct?

Mercury 2.5 and Phi 3 Medium 4k Instruct score almost the same on the Noometry Index (33.5 vs 33.0), so choose on price, context window or the category you care about most.

### Is Mercury 2.5 or Phi 3 Medium 4k Instruct better for coding?

Mercury 2.5 scores higher on coding benchmarks: 39.5 versus 32.9 in the Noometry coding category.

### 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 4 scored results on Noometry and Phi 3 Medium 4k Instruct has 17.