# Aion 3.5 vs Claude Sonnet 4.6

> Claude Sonnet 4.6 has enough public results to be ranked (#42); Aion 3.5 does not yet, so treat this comparison as directional.

- Canonical page: https://noometry.com/compare/aion-3-5-vs-claude-sonnet-4-6
- Last updated: 2026-10-10
- Shared benchmarks: 1

## Summary

- They share 1 benchmark with published results for both. Aion 3.5 scores higher in 1 category and Claude Sonnet 4.6 in 0 categories; one gap is clear of the uncertainty.
- The widest gap is in writing & preference, where Aion 3.5 leads 74.9 to 70.4.
- Aion 3.5 is cheaper at $3 / $6 per million input/output tokens, against $3 / $15 for Claude Sonnet 4.6.
- Claude Sonnet 4.6 accepts more context: 1M tokens versus 262K.

## Snapshot

| | Aion 3.5 | Claude Sonnet 4.6 |
|---|---|---|
| Provider | AionLabs | Anthropic |
| Noometry Index | 57.9 | 50.1 |
| Rank | — | 42 |
| Context | 262K | 1M |
| Input $/M | $3 | $3 |
| Output $/M | $6 | $15 |
| Weights | Proprietary | Proprietary |

## Coding

- Aion 3.5: —
- Claude Sonnet 4.6: 46.0 (#62)

| Benchmark | Aion 3.5 | Claude Sonnet 4.6 |
|---|---|---|
| SWE-bench Verified | — | 75.2% |
| DeepSWE | — | 29.9% |
| FrontierCode | — | 24.3% |
| LMArena WebDev | — | 1521 |
| SciCode | — | 46.8% |
| WeirdML | — | 66.1% |
| LMArena Coding | — | 1504 |
| ALE-Bench | — | 1,327 |

## Agentic & Tool Use

- Aion 3.5: —
- Claude Sonnet 4.6: 39.1 (#26)

| Benchmark | Aion 3.5 | Claude Sonnet 4.6 |
|---|---|---|
| Terminal-Bench | — | 53.4% |
| APEX-Agents | — | 43% |
| OSWorld 2.0 | — | 9.3% |
| DeepResearch Bench | — | 54.9% |
| OSWorld | — | 72.1% |
| ExploitBench | — | 23.6% |
| GBAEval | — | 48.8% |
| GDP.pdf | — | 18% |
| LMArena Search | — | 1221 |
| Vending-Bench 2 | — | 7,204 |

## Reasoning

- Aion 3.5: —
- Claude Sonnet 4.6: 46.1 (#40)

| Benchmark | Aion 3.5 | Claude Sonnet 4.6 |
|---|---|---|
| ARC-AGI-2 | — | 60.4% |
| NYT Connections (extended) | — | 80.9% |
| ARC-AGI-1 | — | 86.5% |
| CritPt | — | 3.1% |
| Chess Puzzles | — | 13% |
| Thematic Generalization | — | 76.3% |
| LMArena Hard Prompts | — | 1485 |
| Mystery Game Puzzles | — | 16% |
| DTBench | — | 89.9% |
| LMCA | — | 46.5% |
| Epoch Capabilities Index | — | 152.25 |
| ForecastBench | — | 62 |

## Math

- Aion 3.5: —
- Claude Sonnet 4.6: 51.9 (#41)

| Benchmark | Aion 3.5 | Claude Sonnet 4.6 |
|---|---|---|
| OTIS Mock AIME 2024-2025 | — | 85.8% |
| ProofBench | — | 45% |
| LMArena Math | — | 1463 |
| FrontierMath (Feb 2025 set) | — | 32.4% |
| FrontierMath Tier 4 (v1) | — | 8.3% |

## Knowledge

- Aion 3.5: —
- Claude Sonnet 4.6: 51.6 (#60)

| Benchmark | Aion 3.5 | Claude Sonnet 4.6 |
|---|---|---|
| GPQA Diamond | — | 87.4% |
| SimpleQA Verified | — | 35.5% |
| Vectara Hallucination Rate | — | 10.6% |
| LMArena Expert | — | 1500 |

## Multimodal

- Aion 3.5: —
- Claude Sonnet 4.6: 38.0 (#61)

| Benchmark | Aion 3.5 | Claude Sonnet 4.6 |
|---|---|---|
| LMArena Vision | — | 1283 |
| Blueprint-Bench 2 | — | 6.7% |
| LMArena Document | — | 1482 |

## Multilingual

- Aion 3.5: —
- Claude Sonnet 4.6: 54.6 (#39)

| Benchmark | Aion 3.5 | Claude Sonnet 4.6 |
|---|---|---|
| LMArena Non-English | — | 1440 |
| LMArena Chinese | — | 1491 |
| LMArena French | — | 1465 |
| LMArena German | — | 1428 |
| LMArena Japanese | — | 1419 |
| LMArena Korean | — | 1411 |
| LMArena Russian | — | 1440 |
| LMArena Spanish | — | 1465 |

## Instruction Following

- Aion 3.5: —
- Claude Sonnet 4.6: 77.6 (#23)

| Benchmark | Aion 3.5 | Claude Sonnet 4.6 |
|---|---|---|
| LMArena Instruction Following | — | 1476 |

## Long Context

- Aion 3.5: —
- Claude Sonnet 4.6: 45.3 (#40)

| Benchmark | Aion 3.5 | Claude Sonnet 4.6 |
|---|---|---|
| LMArena Longer Query | — | 1479 |

## Writing & Preference

- Aion 3.5: 74.9
- Claude Sonnet 4.6: 70.4 (#22)

| Benchmark | Aion 3.5 | Claude Sonnet 4.6 |
|---|---|---|
| EQ-Bench Creative Writing | 1929 | 1810 |
| LMArena Text | — | 1458 |
| LMArena Creative Writing | — | 1435 |
| EQ-Bench 4 | — | 1207 |
| LMArena Multi-Turn | — | 1464 |

## FAQ

### Is Aion 3.5 better than Claude Sonnet 4.6?

Claude Sonnet 4.6 has enough public results to be ranked (#42); Aion 3.5 does not yet, so treat this comparison as directional.

### Which is cheaper, Aion 3.5 or Claude Sonnet 4.6?

Aion 3.5 is cheaper. It lists at $3 per million input tokens and $6 per million output tokens; Claude Sonnet 4.6 lists at $3 and $15.

### Which has the bigger context window?

Claude Sonnet 4.6 does, with 1M tokens against 262K.

### How many benchmarks do Aion 3.5 and Claude Sonnet 4.6 share?

1 benchmark has published results for both models. Aion 3.5 has 1 scored results on Noometry and Claude Sonnet 4.6 has 57.