# DeepSeek V4.1 Flash vs Gemini 3 Flash Preview

> Gemini 3 Flash Preview is the stronger model overall, scoring 52.3 to 50.3 on the Noometry Index. DeepSeek V4.1 Flash costs 4.3× less per token, which makes it the better buy when Gemini 3 Flash Preview's lead doesn't matter for your workload.

- Canonical page: https://noometry.com/compare/deepseek-v4-1-flash-vs-gemini-3-flash-preview
- Last updated: 2026-10-10
- Shared benchmarks: 21

## Summary

- They share 21 benchmarks with published results for both. DeepSeek V4.1 Flash scores higher in 4 categories and Gemini 3 Flash Preview in 4 categories; 5 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where Gemini 3 Flash Preview leads 58.8 to 41.6.
- The biggest single-benchmark swing is ProofBench: 54% for DeepSeek V4.1 Flash and 15% for Gemini 3 Flash Preview.
- DeepSeek V4.1 Flash is cheaper at $0.15 / $0.60 per million input/output tokens, against $0.50 / $3 for Gemini 3 Flash Preview.
- Gemini 3 Flash Preview accepts more context: 1.05M tokens versus 1M.
- DeepSeek V4.1 Flash has downloadable open weights; the other is API-only.

## Snapshot

| | DeepSeek V4.1 Flash | Gemini 3 Flash Preview |
|---|---|---|
| Provider | DeepSeek | Google |
| Noometry Index | 50.3 | 52.3 |
| Rank | 40 | 33 |
| Context | 1M | 1.05M |
| Input $/M | $0.15 | $0.50 |
| Output $/M | $0.60 | $3 |
| Weights | Open | Proprietary |

## Coding

- DeepSeek V4.1 Flash: 52.8 (#29)
- Gemini 3 Flash Preview: 51.5 (#35)

| Benchmark | DeepSeek V4.1 Flash | Gemini 3 Flash Preview |
|---|---|---|
| LMArena WebDev | 1620 | 1439 |
| LMArena Coding | 1511 | 1460 |
| ALE-Bench | 1,092 | 1,367 |
| SWE-bench Verified | — | 75.4% |
| SWE-bench Verified (bash only) | — | 75.8% |
| SWE-bench Multilingual | — | 72.7% |
| SciCode | 51.9% | — |
| GSO | — | 9.8% |
| WeirdML | — | 61.6% |

## Agentic & Tool Use

- DeepSeek V4.1 Flash: —
- Gemini 3 Flash Preview: 38.6 (#27)

| Benchmark | DeepSeek V4.1 Flash | Gemini 3 Flash Preview |
|---|---|---|
| Terminal-Bench | — | 64.3% |
| τ²-bench Airline | — | 82.5% |
| τ²-bench Banking | — | 27.3% |
| τ²-bench Retail | — | 76.8% |
| τ²-bench Telecom | — | 91.2% |
| DeepResearch Bench | — | 49.8% |
| BALROG | — | 48.1% |
| GDP.pdf | — | 10% |
| LMArena Search | — | 1198 |
| Vending-Bench 2 | — | 3,635 |

## Reasoning

- DeepSeek V4.1 Flash: 46.2 (#39)
- Gemini 3 Flash Preview: 49.2 (#35)

| Benchmark | DeepSeek V4.1 Flash | Gemini 3 Flash Preview |
|---|---|---|
| NYT Connections (extended) | 89.6% | 83.1% |
| LMArena Hard Prompts | 1485 | 1465 |
| DTBench | 89.9% | 89.1% |
| LMCA | 47% | 43.1% |
| Epoch Capabilities Index | 155.01 | 151.83 |
| ARC-AGI-2 | — | 33.6% |
| SimpleBench | — | 61.1% |
| ARC-AGI-1 | — | 84.7% |
| CritPt | 14.3% | — |
| Chess Puzzles | — | 40% |
| Mystery Game Puzzles | — | 26% |
| Surface Evolver Bench | 46.3% | — |
| ForecastBench | — | 58.5 |

## Math

- DeepSeek V4.1 Flash: 48.4 (#52)
- Gemini 3 Flash Preview: 51.4 (#42)

| Benchmark | DeepSeek V4.1 Flash | Gemini 3 Flash Preview |
|---|---|---|
| ProofBench | 54% | 15% |
| LMArena Math | 1493 | 1472 |
| FrontierMath (Tiers 1-3) | — | 51.2% |
| FrontierMath Tier 4 | — | 17.1% |
| MathArena Final-Answer Competitions | — | 67.6% |
| OTIS Mock AIME 2024-2025 | — | 95.6% |
| FrontierMath (Feb 2025 set) | — | 35.6% |
| FrontierMath Tier 4 (v1) | — | 4.2% |

## Knowledge

- DeepSeek V4.1 Flash: 41.6 (#97)
- Gemini 3 Flash Preview: 58.8 (#30)

| Benchmark | DeepSeek V4.1 Flash | Gemini 3 Flash Preview |
|---|---|---|
| LMArena Expert | 1505 | 1461 |
| GPQA Diamond | — | 89.4% |
| SimpleQA Verified | — | 66.8% |
| Vectara Hallucination Rate | — | 13.5% |

## Multimodal

- DeepSeek V4.1 Flash: —
- Gemini 3 Flash Preview: 45.3 (#15)

| Benchmark | DeepSeek V4.1 Flash | Gemini 3 Flash Preview |
|---|---|---|
| LMArena Vision | — | 1285 |
| GeoBench | — | 88% |
| VPCT | — | 72.6% |
| Blueprint-Bench 2 | — | 0% |
| LMArena Document | — | 1413 |

## Multilingual

- DeepSeek V4.1 Flash: 55.5 (#29)
- Gemini 3 Flash Preview: 55.9 (#26)

| Benchmark | DeepSeek V4.1 Flash | Gemini 3 Flash Preview |
|---|---|---|
| LMArena Non-English | 1452 | 1458 |
| LMArena Chinese | 1506 | 1510 |
| LMArena French | 1448 | 1478 |
| LMArena Russian | 1473 | 1480 |
| LMArena Spanish | 1499 | 1470 |
| LMArena German | — | 1497 |
| LMArena Japanese | — | 1488 |
| LMArena Korean | — | 1443 |

## Instruction Following

- DeepSeek V4.1 Flash: 77.6 (#24)
- Gemini 3 Flash Preview: 75.8 (#52)

| Benchmark | DeepSeek V4.1 Flash | Gemini 3 Flash Preview |
|---|---|---|
| LMArena Instruction Following | 1475 | 1437 |

## Long Context

- DeepSeek V4.1 Flash: 45.2 (#46)
- Gemini 3 Flash Preview: 44.4 (#63)

| Benchmark | DeepSeek V4.1 Flash | Gemini 3 Flash Preview |
|---|---|---|
| LMArena Longer Query | 1476 | 1452 |

## Writing & Preference

- DeepSeek V4.1 Flash: 65.8 (#43)
- Gemini 3 Flash Preview: 65.6 (#44)

| Benchmark | DeepSeek V4.1 Flash | Gemini 3 Flash Preview |
|---|---|---|
| LMArena Text | 1465 | 1466 |
| LMArena Creative Writing | 1436 | 1457 |
| LMArena Multi-Turn | 1460 | 1471 |
| EQ-Bench Creative Writing | 1540 | — |

## FAQ

### Is DeepSeek V4.1 Flash better than Gemini 3 Flash Preview?

Gemini 3 Flash Preview is the stronger model overall, scoring 52.3 to 50.3 on the Noometry Index. DeepSeek V4.1 Flash costs 4.3× less per token, which makes it the better buy when Gemini 3 Flash Preview's lead doesn't matter for your workload.

### Which is cheaper, DeepSeek V4.1 Flash or Gemini 3 Flash Preview?

DeepSeek V4.1 Flash is cheaper. It lists at $0.15 per million input tokens and $0.60 per million output tokens; Gemini 3 Flash Preview lists at $0.50 and $3.

### Is DeepSeek V4.1 Flash or Gemini 3 Flash Preview better for coding?

DeepSeek V4.1 Flash scores higher on coding benchmarks: 52.8 versus 51.5 in the Noometry coding category.

### Which has the bigger context window?

Gemini 3 Flash Preview does, with 1.05M tokens against 1M.

### How many benchmarks do DeepSeek V4.1 Flash and Gemini 3 Flash Preview share?

21 benchmarks have published results for both models. DeepSeek V4.1 Flash has 25 scored results on Noometry and Gemini 3 Flash Preview has 59.