# Aion 3.5 vs Gemini 3.8 Flash

> Gemini 3.8 Flash has enough public results to be ranked (#13); Aion 3.5 does not yet, so treat this comparison as directional.

- Canonical page: https://noometry.com/compare/aion-3-5-vs-gemini-3-8-flash
- 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 Gemini 3.8 Flash in 0 categories; one gap is clear of the uncertainty.
- Gemini 3.8 Flash is cheaper at $0.75 / $3.75 per million input/output tokens, against $3 / $6 for Aion 3.5.
- Gemini 3.8 Flash accepts more context: 1.05M tokens versus 262K.

## Snapshot

| | Aion 3.5 | Gemini 3.8 Flash |
|---|---|---|
| Provider | AionLabs | Google |
| Noometry Index | 57.9 | 59.5 |
| Rank | — | 13 |
| Context | 262K | 1.05M |
| Input $/M | $3 | $0.75 |
| Output $/M | $6 | $3.75 |
| Weights | Proprietary | Proprietary |

## Coding

- Aion 3.5: —
- Gemini 3.8 Flash: 56.4 (#17)

| Benchmark | Aion 3.5 | Gemini 3.8 Flash |
|---|---|---|
| DeepSWE | — | 73.8% |
| FrontierCode | — | 41.2% |
| CursorBench | — | 39.6% |
| LMArena WebDev | — | 1581 |
| FrontierSWE | — | 19.6% |
| SciCode | — | 56.6% |
| LMArena Coding | — | 1512 |
| ALE-Bench | — | 1,270 |

## Agentic & Tool Use

- Aion 3.5: —
- Gemini 3.8 Flash: 40.3 (#22)

| Benchmark | Aion 3.5 | Gemini 3.8 Flash |
|---|---|---|
| APEX-Agents | — | 64.3% |
| GDP.pdf | — | 23.4% |
| Vending-Bench 2 | — | 5,094 |

## Reasoning

- Aion 3.5: —
- Gemini 3.8 Flash: 64.7 (#13)

| Benchmark | Aion 3.5 | Gemini 3.8 Flash |
|---|---|---|
| NYT Connections (extended) | — | 97.4% |
| CritPt | — | 18.3% |
| Chess Puzzles | — | 61% |
| LMArena Hard Prompts | — | 1506 |
| Mystery Game Puzzles | — | 47% |
| DTBench | — | 95.7% |
| LMCA | — | 52.9% |
| Surface Evolver Bench | — | 76.9% |
| Epoch Capabilities Index | — | 157.13 |

## Math

- Aion 3.5: —
- Gemini 3.8 Flash: 65.2 (#22)

| Benchmark | Aion 3.5 | Gemini 3.8 Flash |
|---|---|---|
| FrontierMath (Tiers 1-3) | — | 68.4% |
| FrontierMath Tier 4 | — | 22% |
| OTIS Mock AIME 2024-2025 | — | 98.9% |
| ProofBench | — | 48% |
| LMArena Math | — | 1528 |

## Knowledge

- Aion 3.5: —
- Gemini 3.8 Flash: 74.9 (#2)

| Benchmark | Aion 3.5 | Gemini 3.8 Flash |
|---|---|---|
| GPQA Diamond | — | 95.4% |
| Humanity's Last Exam | — | 44.5% |
| SimpleQA Verified | — | 69.7% |
| LMArena Expert | — | 1529 |

## Multimodal

- Aion 3.5: —
- Gemini 3.8 Flash: 40.9 (#33)

| Benchmark | Aion 3.5 | Gemini 3.8 Flash |
|---|---|---|
| LMArena Vision | — | 1312 |
| Blueprint-Bench 2 | — | 38.6% |
| Furniture Assembly | — | 31.7% |

## Multilingual

- Aion 3.5: —
- Gemini 3.8 Flash: 57.9 (#5)

| Benchmark | Aion 3.5 | Gemini 3.8 Flash |
|---|---|---|
| LMArena Non-English | — | 1486 |
| LMArena Chinese | — | 1547 |
| LMArena French | — | 1502 |
| LMArena German | — | 1470 |
| LMArena Japanese | — | 1505 |
| LMArena Korean | — | 1479 |
| LMArena Russian | — | 1507 |
| LMArena Spanish | — | 1492 |

## Instruction Following

- Aion 3.5: —
- Gemini 3.8 Flash: 78.2 (#11)

| Benchmark | Aion 3.5 | Gemini 3.8 Flash |
|---|---|---|
| LMArena Instruction Following | — | 1489 |

## Long Context

- Aion 3.5: —
- Gemini 3.8 Flash: 46.2 (#23)

| Benchmark | Aion 3.5 | Gemini 3.8 Flash |
|---|---|---|
| LMArena Longer Query | — | 1506 |

## Writing & Preference

- Aion 3.5: 74.9
- Gemini 3.8 Flash: 72.1 (#16)

| Benchmark | Aion 3.5 | Gemini 3.8 Flash |
|---|---|---|
| EQ-Bench Creative Writing | 1929 | 1748 |
| LMArena Text | — | 1494 |
| LMArena Creative Writing | — | 1485 |
| LMArena Multi-Turn | — | 1503 |

## FAQ

### Is Aion 3.5 better than Gemini 3.8 Flash?

Gemini 3.8 Flash has enough public results to be ranked (#13); Aion 3.5 does not yet, so treat this comparison as directional.

### Which is cheaper, Aion 3.5 or Gemini 3.8 Flash?

Gemini 3.8 Flash is cheaper. It lists at $0.75 per million input tokens and $3.75 per million output tokens; Aion 3.5 lists at $3 and $6.

### Which has the bigger context window?

Gemini 3.8 Flash does, with 1.05M tokens against 262K.

### How many benchmarks do Aion 3.5 and Gemini 3.8 Flash share?

1 benchmark has published results for both models. Aion 3.5 has 1 scored results on Noometry and Gemini 3.8 Flash has 46.