# DeepSeek V4.1 Flash vs GLM-5.1

> Side-by-side benchmark comparison for DeepSeek V4.1 Flash and GLM-5.1 across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/deepseek-v4-1-flash-vs-glm-5-1
- Last updated: September 10, 2026

- Shared sourced benchmarks: 4
- HTML indexing: indexable
- Ranking lane: BenchAlign v5

## Quick Verdict

Pick GLM-5.1 if you want the stronger benchmark profile. DeepSeek V4.1 Flash only makes more sense when its price, context window, or workload-specific category wins matter more than the overall score.

## Summary

- GLM-5.1 leads overall 63.49 to 55.
- The biggest single benchmark swing is NL2Repo in Coding, with scores of 65.4% and 42.7%.
- DeepSeek V4.1 Flash is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.
- DeepSeek V4.1 Flash also has the larger context window at 1M.

## Model Snapshot

| Property | DeepSeek V4.1 Flash | GLM-5.1 |
|----------|----------|----------|
| Creator | DeepSeek | Z.AI |
| Type | Open Weight | Open Weight |
| Reasoning | Reasoning | Reasoning |
| Context | 1M | 203K |
| Overall Score | null | 63.49 |
| Benchmarks Covered | 21 | 26 |
| Pricing (input/output) | $0.30 / $1.20 | $1.40 / $4.40 |

## Category Breakdown

### Agentic

- Winner: Coming soon
- DeepSeek V4.1 Flash public-lane score: Coming soon
- GLM-5.1 public-lane score: 54.5 (Estimated · #37/152)

| Benchmark | DeepSeek V4.1 Flash | GLM-5.1 | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.1 | 90.6% | Coming soon | Coming soon |
| terminalBench3 | 30% | Coming soon | Coming soon |
| Terminal-Bench 4.0 | 31.20% | Coming soon | Coming soon |
| CyberGym | 88.1% | 68.7% | DeepSeek V4.1 Flash |
| ExploitGym | 15.3% | Coming soon | Coming soon |
| HLE w/ tools | 63.9% | Coming soon | Coming soon |
| AutomationBench | 54.8% | Coming soon | Coming soon |
| Agents' Last Exam | 31.8% | Coming soon | Coming soon |
| Terminal-Bench 2.0 | Coming soon | 63.5% | Coming soon |
| BrowseComp | Coming soon | 68% | Coming soon |
| τ³-bench results | Coming soon | 70.6% | Coming soon |
| MCP Atlas | Coming soon | 71.8% | Coming soon |
| Claw-Eval | Coming soon | 62.3% | Coming soon |
| Gert Labs | Coming soon | 60.11% | Coming soon |
| ResearchClawBench | Coming soon | 18.2% | Coming soon |
| Terminal-Bench 2.1 (Vals) | Coming soon | 56.9% | Coming soon |

### Coding

- Winner: Coming soon
- DeepSeek V4.1 Flash public-lane score: Coming soon
- GLM-5.1 public-lane score: 56.5 (Supported · #38/151)

| Benchmark | DeepSeek V4.1 Flash | GLM-5.1 | Winner |
|-----------|-----------|-----------|--------|
| Codeforces | 3471.0 | Coming soon | Coming soon |
| Terminal-Bench 2.1 | 90.6% | Coming soon | Coming soon |
| terminalBench3 | 30% | Coming soon | Coming soon |
| DeepSWE | 74.2% | Coming soon | Coming soon |
| ProgramBench | 20.3% | Coming soon | Coming soon |
| NL2Repo | 65.4% | 42.7% | DeepSeek V4.1 Flash |
| SWE-bench Pro | Coming soon | 58.4% | Coming soon |
| SWE-Rebench | Coming soon | 62.7% | Coming soon |
| Vibe Code Bench | Coming soon | 31.46% | Coming soon |
| OpenHarmony Bench | Coming soon | 52.3% | Coming soon |
| LiveCodeBench (Vals) | Coming soon | 81.4% | Coming soon |
| SWE-bench (Vals) | Coming soon | 76.4% | Coming soon |

### Multimodal & Grounded

- Winner: Coming soon
- DeepSeek V4.1 Flash public-lane score: Coming soon
- GLM-5.1 public-lane score: Coming soon

| Benchmark | DeepSeek V4.1 Flash | GLM-5.1 | Winner |
|-----------|-----------|-----------|--------|
| Chartography (tools) | 78.9% | Coming soon | Coming soon |
| BabyVision w/ Python | 89.6% | Coming soon | Coming soon |
| ZeroBench w/ Python | 49.0% | Coming soon | Coming soon |

### Reasoning

- Winner: Coming soon
- DeepSeek V4.1 Flash public-lane score: Coming soon
- GLM-5.1 public-lane score: 71.7 (Unranked · 2 rankable rows)

### Knowledge

- Winner: Coming soon
- DeepSeek V4.1 Flash public-lane score: Coming soon
- GLM-5.1 public-lane score: 55 (Supported · #54/182)

| Benchmark | DeepSeek V4.1 Flash | GLM-5.1 | Winner |
|-----------|-----------|-----------|--------|
| GPQA | 90.9% | Coming soon | Coming soon |
| GPQA-D | 90.9% | 86.2% | DeepSeek V4.1 Flash |
| HLE | 36.8% | 52.3% | GLM-5.1 |
| GPQA Diamond (Vals) | Coming soon | 84.5% | Coming soon |
| MMLU-Pro (Vals) | Coming soon | 86.9% | Coming soon |

### Instruction Following

- Winner: Coming soon
- DeepSeek V4.1 Flash public-lane score: Coming soon
- GLM-5.1 public-lane score: 93.7 (#5/121)

### Mathematics

- Winner: Coming soon
- DeepSeek V4.1 Flash public-lane score: Coming soon
- GLM-5.1 public-lane score: 64.1 (#3/7)

| Benchmark | DeepSeek V4.1 Flash | GLM-5.1 | Winner |
|-----------|-----------|-----------|--------|
| Apex | 65.6% | Coming soon | Coming soon |
| AIME26 | Coming soon | 95.3% | Coming soon |
| HMMT Nov 2025 | Coming soon | 94.0% | Coming soon |
| HMMT Feb 2026 | Coming soon | 82.6% | Coming soon |
| MMAnswerBench | Coming soon | 83.8% | Coming soon |
| FrontierMath v2 (Tiers 1-3) | Coming soon | 33.448% | Coming soon |
| FrontierMath v2 (Tier 4) | Coming soon | 12.500% | Coming soon |

## FAQ

### Which is better overall, DeepSeek V4.1 Flash or GLM-5.1?

GLM-5.1 is ahead overall on BenchLM right now.

### How many benchmarks does DeepSeek V4.1 Flash cover on BenchLM?

DeepSeek V4.1 Flash currently has 21 sourced benchmark scores on BenchLM.

### How many benchmarks does GLM-5.1 cover on BenchLM?

GLM-5.1 currently has 26 sourced benchmark scores on BenchLM.

## Related Comparisons

- [DeepSeek V4.1 Flash vs GLM-5.3](/compare/deepseek-v4-1-flash-vs-glm-5-3)
- [GLM-5.1 vs GLM-5.3](/compare/glm-5-1-vs-glm-5-3)
- [DeepSeek V4.1 Flash vs GLM-5.2](/compare/deepseek-v4-1-flash-vs-glm-5-2)
- [GLM-5.1 vs GLM-5.2](/compare/glm-5-1-vs-glm-5-2)

## Explore More

- [DeepSeek V4.1 Flash profile](/models/deepseek-v4-1-flash)
- [GLM-5.1 profile](/models/glm-5-1)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)