# Composer 2.5 vs DeepSeek V4 Flash 0731

> Side-by-side benchmark comparison for Composer 2.5 and DeepSeek V4 Flash 0731 across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/composer-2-5-vs-deepseek-v4-flash-0731
- Last updated: September 27, 2026

- Shared sourced benchmarks: 5
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.7

## Quick Verdict

Pick Composer 2.5 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

- Composer 2.5 leads overall 60 to 57.
- The biggest single benchmark swing is Terminal-Bench 2.0 in Agentic, with scores of 69.3% and 56.9%.
- DeepSeek V4 Flash 0731 is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.
- DeepSeek V4 Flash 0731 also has the larger context window at 1M.

## Model Snapshot

| Property | Composer 2.5 | DeepSeek V4 Flash 0731 |
|----------|----------|----------|
| Creator | Cursor | DeepSeek |
| Type | Proprietary | Open Weight |
| Reasoning | Reasoning | Reasoning |
| Context | 200K | 1M |
| Overall Score | null | null |
| Benchmarks Covered | 7 | 42 |
| Pricing (input/output) | $0.50 / $2.50 | $0.14 / $0.28 |

## Category Breakdown

### Agentic

- Winner: Not comparable
- Composer 2.5 public-lane score: Coming soon
- DeepSeek V4 Flash 0731 public-lane score: Coming soon

| Benchmark | Composer 2.5 | DeepSeek V4 Flash 0731 | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.0 | 69.3% | 56.9% | Composer 2.5 |
| Terminal-Bench 2.1 (Vals) | 58.4% | 67.0% | DeepSeek V4 Flash 0731 |
| BrowseComp | Coming soon | 73.2% | Coming soon |
| HLE w/ tools | Coming soon | 45.1% | Coming soon |
| MCP Atlas | Coming soon | 69% | Coming soon |
| Toolathlon | Coming soon | 47.8% | Coming soon |
| Terminal-Bench 2.1 | Coming soon | 82.7% | Coming soon |
| CyberGym | Coming soon | 76.7% | Coming soon |
| Toolathlon-Verified | Coming soon | 70.3% | Coming soon |
| Agents' Last Exam | Coming soon | 25.2% | Coming soon |
| AutomationBench | Coming soon | 25.1% | Coming soon |

### Coding

- Winner: Not comparable
- Composer 2.5 public-lane score: Coming soon
- DeepSeek V4 Flash 0731 public-lane score: Coming soon

| Benchmark | Composer 2.5 | DeepSeek V4 Flash 0731 | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.0 | 69.3% | 56.9% | Composer 2.5 |
| SWE Multilingual | 79.8% | 73.3% | Composer 2.5 |
| cursorBench31 | 63.2% | Coming soon | Coming soon |
| cursorBench32 | 56.1% | Coming soon | Coming soon |
| SWE-bench (Vals) | 79.6% | 88.8% | DeepSeek V4 Flash 0731 |
| LiveCodeBench Pass@1-COT | Coming soon | 91.6% | Coming soon |
| Codeforces | Coming soon | 3052.0 | Coming soon |
| SWE-bench Verified | Coming soon | 79% | Coming soon |
| SWE-bench Pro | Coming soon | 52.6% | Coming soon |
| Terminal-Bench 2.1 | Coming soon | 82.7% | Coming soon |
| NL2Repo | Coming soon | 54.2% | Coming soon |
| DeepSWE | Coming soon | 54.4% | Coming soon |
| DSBench-FullStack | Coming soon | 68.7% | Coming soon |
| DSBench-Hard | Coming soon | 59.6% | Coming soon |
| VulcanBench v3 | Coming soon | 88.4% | Coming soon |
| OpenHarmony Bench | Coming soon | 53.8% | Coming soon |
| LiveCodeBench (Vals) | Coming soon | 87.3% | Coming soon |

### Reasoning

- Winner: Not comparable
- Composer 2.5 public-lane score: Coming soon
- DeepSeek V4 Flash 0731 public-lane score: 57 (Unranked · 4 rankable rows)

| Benchmark | Composer 2.5 | DeepSeek V4 Flash 0731 | Winner |
|-----------|-----------|-----------|--------|
| MRCR 1M | Coming soon | 78.7% | Coming soon |
| CorpusQA 1M | Coming soon | 60.5% | Coming soon |
| ARC-AGI-1 | Coming soon | 89.00% | Coming soon |
| ARC-AGI-2 | Coming soon | 61.4% | Coming soon |

### Knowledge

- Winner: Not comparable
- Composer 2.5 public-lane score: Coming soon
- DeepSeek V4 Flash 0731 public-lane score: Coming soon

| Benchmark | Composer 2.5 | DeepSeek V4 Flash 0731 | Winner |
|-----------|-----------|-----------|--------|
| MMLU-Pro | Coming soon | 86.2% | Coming soon |
| SimpleQA | Coming soon | 34.1% | Coming soon |
| Chinese-SimpleQA | Coming soon | 78.9% | Coming soon |
| GPQA | Coming soon | 88.1% | Coming soon |
| GPQA-D | Coming soon | 88.1% | Coming soon |
| HLE | Coming soon | 34.8% | Coming soon |
| GPQA Diamond (Vals) | Coming soon | 89.9% | Coming soon |
| MMLU-Pro (Vals) | Coming soon | 86.2% | Coming soon |

### Mathematics

- Winner: Not comparable
- Composer 2.5 public-lane score: Coming soon
- DeepSeek V4 Flash 0731 public-lane score: 79.9 (Unranked · 4 rankable rows)

| Benchmark | Composer 2.5 | DeepSeek V4 Flash 0731 | Winner |
|-----------|-----------|-----------|--------|
| HMMT Feb 2026 | Coming soon | 94.8% | Coming soon |
| IMOAnswerBench | Coming soon | 88.4% | Coming soon |
| Apex | Coming soon | 33.0% | Coming soon |
| Apex Shortlist | Coming soon | 85.7% | Coming soon |

## FAQ

### Which is better overall, Composer 2.5 or DeepSeek V4 Flash 0731?

Composer 2.5 is ahead overall on BenchLM right now.

### How many benchmarks does Composer 2.5 cover on BenchLM?

Composer 2.5 currently has 7 sourced benchmark scores on BenchLM.

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

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

## Related Comparisons

- [Composer 2.5 vs Composer 2](/compare/composer-2-vs-composer-2-5)
- [DeepSeek V4 Flash 0731 vs Composer 2](/compare/composer-2-vs-deepseek-v4-flash-0731)
- [Composer 2.5 vs Composer 2 Fast](/compare/composer-2-5-vs-composer-2-fast)
- [DeepSeek V4 Flash 0731 vs Composer 2 Fast](/compare/composer-2-fast-vs-deepseek-v4-flash-0731)

## Explore More

- [Composer 2.5 profile](/models/composer-2-5)
- [DeepSeek V4 Flash 0731 profile](/models/deepseek-v4-flash-0731)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)