# AI Co-Mathematician vs DeepSeek V4 Flash

> DeepSeek V4 Flash has enough public results to be ranked (#35); AI Co-Mathematician does not yet, so treat this comparison as directional.

- Canonical page: https://noometry.com/compare/ai-co-mathematician-vs-deepseek-v4-flash
- Last updated: 2026-10-12
- Shared benchmarks: 1

## Summary

- They share 1 benchmark with published results for both. AI Co-Mathematician scores higher in 1 category and DeepSeek V4 Flash in 0 categories; one gap is clear of the uncertainty.
- The widest gap is in math, where AI Co-Mathematician leads 72.3 to 60.3.
- The biggest single-benchmark swing is FrontierMath Tier 4: 75.6% for AI Co-Mathematician and 24.4% for DeepSeek V4 Flash.
- DeepSeek V4 Flash has downloadable open weights; the other is API-only.

## Snapshot

| | AI Co-Mathematician | DeepSeek V4 Flash |
|---|---|---|
| Provider | Google | DeepSeek |
| Noometry Index | 58.1 | 53.6 |
| Rank | — | 35 |
| Context | — | 1M |
| Input $/M | — | $0.15 |
| Output $/M | — | $0.60 |
| Weights | Proprietary | Open |

## Coding

- AI Co-Mathematician: —
- DeepSeek V4 Flash: 47.9 (#59)

| Benchmark | AI Co-Mathematician | DeepSeek V4 Flash |
|---|---|---|
| FrontierCode | — | 18.8% |
| LMArena WebDev | — | 1582 |
| SciCode | — | 49.9% |
| WeirdML | — | 63% |
| LMArena Coding | — | 1457 |
| ALE-Bench | — | 1,306 |

## Reasoning

- AI Co-Mathematician: —
- DeepSeek V4 Flash: 53.7 (#30)

| Benchmark | AI Co-Mathematician | DeepSeek V4 Flash |
|---|---|---|
| ARC-AGI-2 | — | 61.4% |
| SimpleBench | — | 61.1% |
| Kagi LLM Benchmark | — | 52.2% |
| NYT Connections (extended) | — | 89.6% |
| ARC-AGI-1 | — | 89% |
| CritPt | — | 16.6% |
| Chess Puzzles | — | 33% |
| LMArena Hard Prompts | — | 1444 |
| Mystery Game Puzzles | — | 34% |
| DTBench | — | 90.9% |
| LMCA | — | 41.7% |
| Epoch Capabilities Index | — | 154.49 |

## Math

- AI Co-Mathematician: 72.3
- DeepSeek V4 Flash: 60.3 (#37)

| Benchmark | AI Co-Mathematician | DeepSeek V4 Flash |
|---|---|---|
| FrontierMath Tier 4 | 75.6% | 24.4% |
| FrontierMath (Tiers 1-3) | — | 57.5% |
| MathArena Final-Answer Competitions | — | 76.5% |
| OTIS Mock AIME 2024-2025 | — | 94.4% |
| ProofBench | — | 56% |
| LMArena Math | — | 1427 |
| FrontierMath Tier 4 (v1) | 47.9% | — |

## Knowledge

- AI Co-Mathematician: —
- DeepSeek V4 Flash: 55.4 (#48)

| Benchmark | AI Co-Mathematician | DeepSeek V4 Flash |
|---|---|---|
| GPQA Diamond | — | 91% |
| SimpleQA Verified | — | 33.6% |
| LMArena Expert | — | 1441 |

## Multilingual

- AI Co-Mathematician: —
- DeepSeek V4 Flash: 53.0 (#72)

| Benchmark | AI Co-Mathematician | DeepSeek V4 Flash |
|---|---|---|
| LMArena Non-English | — | 1420 |
| LMArena Chinese | — | 1468 |
| LMArena French | — | 1439 |
| LMArena German | — | 1418 |
| LMArena Japanese | — | 1406 |
| LMArena Korean | — | 1384 |
| LMArena Russian | — | 1428 |
| LMArena Spanish | — | 1436 |

## Instruction Following

- AI Co-Mathematician: —
- DeepSeek V4 Flash: 74.9 (#81)

| Benchmark | AI Co-Mathematician | DeepSeek V4 Flash |
|---|---|---|
| LMArena Instruction Following | — | 1421 |

## Long Context

- AI Co-Mathematician: —
- DeepSeek V4 Flash: 43.8 (#85)

| Benchmark | AI Co-Mathematician | DeepSeek V4 Flash |
|---|---|---|
| LMArena Longer Query | — | 1434 |

## Writing & Preference

- AI Co-Mathematician: —
- DeepSeek V4 Flash: 63.8 (#61)

| Benchmark | AI Co-Mathematician | DeepSeek V4 Flash |
|---|---|---|
| LMArena Text | — | 1432 |
| LMArena Creative Writing | — | 1403 |
| EQ-Bench Creative Writing | — | 1559 |
| LMArena Multi-Turn | — | 1449 |

## FAQ

### Is AI Co-Mathematician better than DeepSeek V4 Flash?

DeepSeek V4 Flash has enough public results to be ranked (#35); AI Co-Mathematician does not yet, so treat this comparison as directional.

### How many benchmarks do AI Co-Mathematician and DeepSeek V4 Flash share?

1 benchmark has published results for both models. AI Co-Mathematician has 2 scored results on Noometry and DeepSeek V4 Flash has 41.