# Mercury 2.5 vs Qwen3-4B

> Qwen3-4B has enough public results to be ranked (#261); Mercury 2.5 does not yet, so treat this comparison as directional.

- Canonical page: https://noometry.com/compare/mercury-2-5-vs-qwen3-4b
- Last updated: 2026-10-10
- Shared benchmarks: 0

## Summary

- The widest gap is in math, where Qwen3-4B leads 28.5 to 22.4.
- Qwen3-4B has downloadable open weights; the other is API-only.

## Snapshot

| | Mercury 2.5 | Qwen3-4B |
|---|---|---|
| Provider | Inception | Alibaba (Qwen) |
| Noometry Index | 30.2 | 31.5 |
| Rank | — | 261 |
| Context | 260K | — |
| Input $/M | $0.04 | — |
| Output $/M | $0.15 | — |
| Weights | Proprietary | Open |

## Coding

- Mercury 2.5: —
- Qwen3-4B: —

| Benchmark | Mercury 2.5 | Qwen3-4B |
|---|---|---|
| ALE-Bench | 301.65 | — |

## Agentic & Tool Use

- Mercury 2.5: —
- Qwen3-4B: 27.3 (#94)

| Benchmark | Mercury 2.5 | Qwen3-4B |
|---|---|---|
| Berkeley Function Calling Leaderboard | — | 35.7% |

## Reasoning

- Mercury 2.5: —
- Qwen3-4B: 18.5 (#264)

| Benchmark | Mercury 2.5 | Qwen3-4B |
|---|---|---|
| Chess Puzzles | — | 4% |

## Math

- Mercury 2.5: 22.4
- Qwen3-4B: 28.5 (#228)

| Benchmark | Mercury 2.5 | Qwen3-4B |
|---|---|---|
| MathArena Final-Answer Competitions | — | 38.5% |
| OTIS Mock AIME 2024-2025 | — | 52.2% |
| ProofBench | 3% | — |

## Knowledge

- Mercury 2.5: —
- Qwen3-4B: 33.0 (#198)

| Benchmark | Mercury 2.5 | Qwen3-4B |
|---|---|---|
| GPQA Diamond | — | 52.3% |
| Vectara Hallucination Rate | — | 5.7% |

## FAQ

### Is Mercury 2.5 better than Qwen3-4B?

Qwen3-4B has enough public results to be ranked (#261); Mercury 2.5 does not yet, so treat this comparison as directional.

### How many benchmarks do Mercury 2.5 and Qwen3-4B share?

0 benchmarks have published results for both models. Mercury 2.5 has 2 scored results on Noometry and Qwen3-4B has 6.