# Aion 3.5 vs Muse Spark 1.3

> Muse Spark 1.3 has enough public results to be ranked (#27); Aion 3.5 does not yet, so treat this comparison as directional.

- Canonical page: https://noometry.com/compare/aion-3-5-vs-muse-spark-1-3
- Last updated: 2026-10-12
- Shared benchmarks: 1

## Summary

- They share 1 benchmark with published results for both. Aion 3.5 scores higher in 1 category and Muse Spark 1.3 in 0 categories; one gap is clear of the uncertainty.
- Muse Spark 1.3 is cheaper at $1.25 / $4.25 per million input/output tokens, against $3 / $6 for Aion 3.5.
- Muse Spark 1.3 accepts more context: 1.05M tokens versus 262K.

## Snapshot

| | Aion 3.5 | Muse Spark 1.3 |
|---|---|---|
| Provider | AionLabs | Meta |
| Noometry Index | 58.1 | 54.8 |
| Rank | — | 27 |
| Context | 262K | 1.05M |
| Input $/M | $3 | $1.25 |
| Output $/M | $6 | $4.25 |
| Weights | Proprietary | Proprietary |

## Coding

- Aion 3.5: —
- Muse Spark 1.3: 56.6 (#21)

| Benchmark | Aion 3.5 | Muse Spark 1.3 |
|---|---|---|
| CursorBench | — | 41.6% |
| LMArena WebDev | — | 1657 |
| SciCode | — | 59.7% |
| LMArena Coding | — | 1514 |

## Agentic & Tool Use

- Aion 3.5: —
- Muse Spark 1.3: 38.6 (#30)

| Benchmark | Aion 3.5 | Muse Spark 1.3 |
|---|---|---|
| APEX-Agents | — | 57.8% |
| GDP.pdf | — | 27.6% |

## Reasoning

- Aion 3.5: —
- Muse Spark 1.3: 54.0 (#27)

| Benchmark | Aion 3.5 | Muse Spark 1.3 |
|---|---|---|
| NYT Connections (extended) | — | 85.1% |
| CritPt | — | 26% |
| Chess Puzzles | — | 38% |
| LMArena Hard Prompts | — | 1503 |
| Mystery Game Puzzles | — | 25% |
| DTBench | — | 96.5% |
| LMCA | — | 53.9% |
| Bench to the Future 3 | — | 0.14 |
| Epoch Capabilities Index | — | 156.75 |

## Math

- Aion 3.5: —
- Muse Spark 1.3: 73.1 (#21)

| Benchmark | Aion 3.5 | Muse Spark 1.3 |
|---|---|---|
| FrontierMath (Tiers 1-3) | — | 74.4% |
| FrontierMath Tier 4 | — | 46.3% |
| OTIS Mock AIME 2024-2025 | — | 99.2% |
| ProofBench | — | 58% |
| LMArena Math | — | 1494 |

## Knowledge

- Aion 3.5: —
- Muse Spark 1.3: 42.6 (#95)

| Benchmark | Aion 3.5 | Muse Spark 1.3 |
|---|---|---|
| LMArena Expert | — | 1516 |

## Multimodal

- Aion 3.5: —
- Muse Spark 1.3: 43.7 (#22)

| Benchmark | Aion 3.5 | Muse Spark 1.3 |
|---|---|---|
| LMArena Vision | — | 1309 |
| LMArena Document | — | 1471 |

## Multilingual

- Aion 3.5: —
- Muse Spark 1.3: 57.4 (#8)

| Benchmark | Aion 3.5 | Muse Spark 1.3 |
|---|---|---|
| LMArena Non-English | — | 1481 |
| LMArena Chinese | — | 1529 |
| LMArena French | — | 1524 |
| LMArena German | — | 1515 |
| LMArena Japanese | — | 1474 |
| LMArena Korean | — | 1501 |
| LMArena Russian | — | 1490 |
| LMArena Spanish | — | 1490 |

## Instruction Following

- Aion 3.5: —
- Muse Spark 1.3: 77.5 (#22)

| Benchmark | Aion 3.5 | Muse Spark 1.3 |
|---|---|---|
| LMArena Instruction Following | — | 1477 |

## Long Context

- Aion 3.5: —
- Muse Spark 1.3: 45.6 (#32)

| Benchmark | Aion 3.5 | Muse Spark 1.3 |
|---|---|---|
| LMArena Longer Query | — | 1488 |

## Writing & Preference

- Aion 3.5: 74.9
- Muse Spark 1.3: 73.6 (#9)

| Benchmark | Aion 3.5 | Muse Spark 1.3 |
|---|---|---|
| EQ-Bench Creative Writing | 1929 | 1906 |
| LMArena Text | — | 1490 |
| LMArena Creative Writing | — | 1455 |
| LMArena Multi-Turn | — | 1482 |

## FAQ

### Is Aion 3.5 better than Muse Spark 1.3?

Muse Spark 1.3 has enough public results to be ranked (#27); Aion 3.5 does not yet, so treat this comparison as directional.

### Which is cheaper, Aion 3.5 or Muse Spark 1.3?

Muse Spark 1.3 is cheaper. It lists at $1.25 per million input tokens and $4.25 per million output tokens; Aion 3.5 lists at $3 and $6.

### Which has the bigger context window?

Muse Spark 1.3 does, with 1.05M tokens against 262K.

### How many benchmarks do Aion 3.5 and Muse Spark 1.3 share?

1 benchmark has published results for both models. Aion 3.5 has 1 scored results on Noometry and Muse Spark 1.3 has 37.