# DeepSeek V4 Flash 0731 vs Gemini 3.5 Flash

> Side-by-side benchmark comparison for DeepSeek V4 Flash 0731 and Gemini 3.5 Flash across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/deepseek-v4-flash-0731-vs-gemini-3-5-flash
- Last updated: September 27, 2026

- Shared sourced benchmarks: 14
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.7

## Quick Verdict

Pick Gemini 3.5 Flash if you want the stronger benchmark profile. DeepSeek V4 Flash 0731 only makes more sense when its price, context window, or workload-specific category wins matter more than the overall score.

## Summary

- Gemini 3.5 Flash leads overall 63.49 to 57.
- The clearest category separation is in mathematics, where the averages are 79.9 for DeepSeek V4 Flash 0731 and 55.1 for Gemini 3.5 Flash.
- The biggest single benchmark swing is MRCR 1M in Reasoning, with scores of 78.7% and 26.6%.
- DeepSeek V4 Flash 0731 is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.

## Model Snapshot

| Property | DeepSeek V4 Flash 0731 | Gemini 3.5 Flash |
|----------|----------|----------|
| Creator | DeepSeek | Google |
| Type | Open Weight | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 1M | 1M |
| Overall Score | null | 63.49 |
| Benchmarks Covered | 42 | 27 |
| Pricing (input/output) | $0.14 / $0.28 | $1.50 / $9.00 |

## Category Breakdown

### Agentic

- Winner: Not comparable
- DeepSeek V4 Flash 0731 public-lane score: Coming soon
- Gemini 3.5 Flash public-lane score: 50 (Supported · #35/105)

| Benchmark | DeepSeek V4 Flash 0731 | Gemini 3.5 Flash | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.0 | 56.9% | Coming soon | Coming soon |
| BrowseComp | 73.2% | Coming soon | Coming soon |
| HLE w/ tools | 45.1% | Coming soon | Coming soon |
| MCP Atlas | 69% | 83.6% | Gemini 3.5 Flash |
| Toolathlon | 47.8% | 56.5% | Gemini 3.5 Flash |
| Terminal-Bench 2.1 | 82.7% | 76.2% | DeepSeek V4 Flash 0731 |
| CyberGym | 76.7% | Coming soon | Coming soon |
| Toolathlon-Verified | 70.3% | Coming soon | Coming soon |
| Agents' Last Exam | 25.2% | Coming soon | Coming soon |
| AutomationBench | 25.1% | Coming soon | Coming soon |
| Terminal-Bench 2.1 (Vals) | 67.0% | 74.2% | Gemini 3.5 Flash |
| OSWorld-Verified | Coming soon | 78.4% | Coming soon |
| Finance Agent v2 | Coming soon | 57.9% | Coming soon |
| Gert Labs | Coming soon | 61.85% | Coming soon |
| ResearchClawBench | Coming soon | 18.0% | Coming soon |

### Coding

- Winner: Not comparable
- DeepSeek V4 Flash 0731 public-lane score: Coming soon
- Gemini 3.5 Flash public-lane score: 53.2 (Supported · #33/135)

| Benchmark | DeepSeek V4 Flash 0731 | Gemini 3.5 Flash | Winner |
|-----------|-----------|-----------|--------|
| LiveCodeBench Pass@1-COT | 91.6% | Coming soon | Coming soon |
| Codeforces | 3052.0 | Coming soon | Coming soon |
| SWE-bench Verified | 79% | Coming soon | Coming soon |
| SWE-bench Pro | 52.6% | 55.1% | Gemini 3.5 Flash |
| SWE Multilingual | 73.3% | Coming soon | Coming soon |
| Terminal-Bench 2.0 | 56.9% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | 82.7% | 76.2% | DeepSeek V4 Flash 0731 |
| NL2Repo | 54.2% | Coming soon | Coming soon |
| DeepSWE | 54.4% | Coming soon | Coming soon |
| DSBench-FullStack | 68.7% | Coming soon | Coming soon |
| DSBench-Hard | 59.6% | Coming soon | Coming soon |
| VulcanBench v3 | 88.4% | Coming soon | Coming soon |
| OpenHarmony Bench | 53.8% | Coming soon | Coming soon |
| LiveCodeBench (Vals) | 87.3% | 87.6% | Gemini 3.5 Flash |
| SWE-bench (Vals) | 88.8% | 78.8% | DeepSeek V4 Flash 0731 |
| Vibe Code Bench | Coming soon | 48.68% | Coming soon |
| cursorBench31 | Coming soon | 49.8% | Coming soon |
| cursorBench32 | Coming soon | 48.8% | Coming soon |

### Reasoning

- Winner: Not comparable
- DeepSeek V4 Flash 0731 public-lane score: 57 (Unranked · 4 rankable rows)
- Gemini 3.5 Flash public-lane score: 62.7 (#13/19)

| Benchmark | DeepSeek V4 Flash 0731 | Gemini 3.5 Flash | Winner |
|-----------|-----------|-----------|--------|
| MRCR 1M | 78.7% | 26.6% | DeepSeek V4 Flash 0731 |
| CorpusQA 1M | 60.5% | Coming soon | Coming soon |
| ARC-AGI-1 | 89.00% | Coming soon | Coming soon |
| ARC-AGI-2 | 61.4% | 72.1% | Gemini 3.5 Flash |
| MRCRv2 | Coming soon | 77.3% | Coming soon |

### Multimodal & Grounded

- Winner: Not comparable
- DeepSeek V4 Flash 0731 public-lane score: Coming soon
- Gemini 3.5 Flash public-lane score: 86.8 (#7/50)

| Benchmark | DeepSeek V4 Flash 0731 | Gemini 3.5 Flash | Winner |
|-----------|-----------|-----------|--------|
| CharXiv | Coming soon | 84.2% | Coming soon |
| MMMU-Pro | Coming soon | 83.6% | Coming soon |
| Blueprint-Bench 2 | Coming soon | 33.6% | Coming soon |

### Knowledge

- Winner: Not comparable
- DeepSeek V4 Flash 0731 public-lane score: Coming soon
- Gemini 3.5 Flash public-lane score: 64.4 (Supported · #24/158)

| Benchmark | DeepSeek V4 Flash 0731 | Gemini 3.5 Flash | Winner |
|-----------|-----------|-----------|--------|
| MMLU-Pro | 86.2% | Coming soon | Coming soon |
| SimpleQA | 34.1% | Coming soon | Coming soon |
| Chinese-SimpleQA | 78.9% | Coming soon | Coming soon |
| GPQA | 88.1% | Coming soon | Coming soon |
| GPQA-D | 88.1% | 92.7% | Gemini 3.5 Flash |
| HLE | 34.8% | 40.2% | Gemini 3.5 Flash |
| GPQA Diamond (Vals) | 89.9% | 92.7% | Gemini 3.5 Flash |
| MMLU-Pro (Vals) | 86.2% | 89.5% | Gemini 3.5 Flash |

### Instruction Following

- Winner: Not comparable
- DeepSeek V4 Flash 0731 public-lane score: Coming soon
- Gemini 3.5 Flash public-lane score: 84.1 (#43/124)

### Mathematics

- Winner: Not comparable
- DeepSeek V4 Flash 0731 public-lane score: 79.9 (Unranked · 4 rankable rows)
- Gemini 3.5 Flash public-lane score: 55.1 (Unranked · 2 rankable rows)

| Benchmark | DeepSeek V4 Flash 0731 | Gemini 3.5 Flash | Winner |
|-----------|-----------|-----------|--------|
| HMMT Feb 2026 | 94.8% | Coming soon | Coming soon |
| IMOAnswerBench | 88.4% | Coming soon | Coming soon |
| Apex | 33.0% | Coming soon | Coming soon |
| Apex Shortlist | 85.7% | Coming soon | Coming soon |
| FrontierMath v2 (Tiers 1-3) | Coming soon | 38.966% | Coming soon |
| FrontierMath v2 (Tier 4) | Coming soon | 14.583% | Coming soon |

## FAQ

### Which is better overall, DeepSeek V4 Flash 0731 or Gemini 3.5 Flash?

Gemini 3.5 Flash is ahead overall on BenchLM right now.

### Where is the biggest gap between DeepSeek V4 Flash 0731 and Gemini 3.5 Flash?

The widest category gap is in mathematics, where the averages are 79.9 for DeepSeek V4 Flash 0731 and 55.1 for Gemini 3.5 Flash.

### How many benchmarks does DeepSeek V4 Flash 0731 cover on BenchLM?

DeepSeek V4 Flash 0731 currently has 42 sourced benchmark scores on BenchLM.

### How many benchmarks does Gemini 3.5 Flash cover on BenchLM?

Gemini 3.5 Flash currently has 27 sourced benchmark scores on BenchLM.

## Related Comparisons

- [DeepSeek V4 Flash 0731 vs Gemini 3.5 Flash Cyber](/compare/deepseek-v4-flash-0731-vs-gemini-3-5-flash-cyber)
- [Gemini 3.5 Flash vs Gemini 3.5 Flash Cyber](/compare/gemini-3-5-flash-vs-gemini-3-5-flash-cyber)
- [DeepSeek V4 Flash 0731 vs GPT-6 Astra](/compare/deepseek-v4-flash-0731-vs-gpt-6-astra)
- [Gemini 3.5 Flash vs GPT-6 Astra](/compare/gemini-3-5-flash-vs-gpt-6-astra)

## Explore More

- [DeepSeek V4 Flash 0731 profile](/models/deepseek-v4-flash-0731)
- [Gemini 3.5 Flash profile](/models/gemini-3-5-flash)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)