Data points: 108
The readout for DeepSeek V4 Flash and GLM-5.1, before the detailed comparison sheet.
Decision read
DeepSeek V4 Flash
DeepSeek V4 Flash currently has the stronger profile, with verified wins split 5 to 1.
Evidence depth
108 data points
Includes 8 benchmark rows, 6 audit samples, and 9 provider examples.
Selection signal
Start with DeepSeek V4 Flash
The charts below split 23 high-signal samples across speed, scores, and audit health.
Model compare DeepSeek V4 Flash vs GLM-5.1deepseek-v4-flash-vs-glm-5-1 | Model A DeepSeek V4 Flash | Model B GLM-5.1 |
|---|---|---|
| Overall leader | Leading | Contender |
| Verified metric wins | 5 wins | 1 wins |
| Where it leads | Average speed, First-token latency, Free providers, Provider coverage, Recent tests | Cheapest input price |
| Model metadata | DeepSeek V4 Flash exposes 1.0M tokens; notable signals: Text input, Text output, Tool calling, Structured outputs. | No OpenRouter metadata is available yet for this model. |
| Developer | DeepSeek | Zhipu AI |
| Context window | 1.0M tokens | No data |
| Max output | 131.1K tokens | No data |
| Released | Apr 2026 | No data |
| Modalities | Input Text Output Text | No data |
| Features | Text inputText outputTool callingStructured outputsJSON modeReasoning | None listed |
| Parameters | No data | No data |
| Tokenizer | DeepSeek | No data |
| Knowledge cutoff | No data | No data |
| OpenRouter ID | deepseek/deepseek-v4-flash | No data |
| References | No data | No data |
Third-party benchmark profile synced into LMSpeed; only metrics available for both models are shown.
| Metric | DeepSeek V4 Flash | GLM-5.1 |
|---|---|---|
| Output price | $0.280/M#4 | $4.40/M#33 |
| Input price | $0.140/M#8 | $1.40/M#32 |
| Blended price | $0.175/M#10 | $2.15/M#53 |
| GPQA | 89.4%#11 | 86.8%#22 |
| HLE | 32.1%#13 | 28.0%#18 |
| SciCode | 44.9%#23 | 43.8%#26 |
| Time to first token | 0.94 s#34 | 0.90 s#31 |
| Output speed | 96.7 tok/s#52 | 71.0 tok/s#72 |
Latest completed audits from shared providers, with four safety and integrity score groups plus report links.
| Provider | DeepSeek V4 Flash | GLM-5.1 |
|---|---|---|
PICO APIWinner: DeepSeek V4 Flash | DeepSeek V4 Flash deepseek-v4-flash Audit score 92 10068100100 | GLM-5.1 glm-5.1 No audit yet |
MyDamoxingWinner: DeepSeek V4 Flash | DeepSeek V4 Flash deepseek-v4-flash Audit score 84 787584100 | GLM-5.1 GLM-5.1 No audit yet |
CatClaw APIWinner: DeepSeek V4 Flash | DeepSeek V4 Flash deepseek-v4-flash Audit score 83 766886100 | GLM-5.1 glm-5.1 Audit score 78 766868100 |
小水管 APIWinner: DeepSeek V4 Flash | DeepSeek V4 Flash deepseek-v4-flash Audit score 81 727280100 | GLM-5.1 glm-5.1 No audit yet |
TokenessWinner: DeepSeek V4 Flash | DeepSeek V4 Flash deepseek-v4-flash Audit score 79 648468100 | GLM-5.1 glm-5.1 No audit yet |
VSLLMWinner: GLM-5.1 | DeepSeek V4 Flash deepseek-v4-flash-free No audit yet | GLM-5.1 glm-5.1-free Audit score 79 678465100 |
Speed aggregates and input/output pricing share each provider row for real API selection and migration cost checks.
| Provider | DeepSeek V4 Flash | GLM-5.1 |
|---|---|---|
NVIDIA NIM45 tests | DeepSeek V4 Flash speed / latency 24 tok/s / 9354ms input / output No data | GLM-5.1 speed / latency 123 tok/s / 671ms input / output No data |
SiliconFlow35 tests | DeepSeek V4 Flash speed / latency 45 tok/s / 9731ms input / output No data | GLM-5.1 speed / latency 50 tok/s / 9040ms input / output No data |
火山引擎 Ark35 tests | DeepSeek V4 Flash speed / latency 73 tok/s / 3161ms input / output No data | GLM-5.1 speed / latency 35 tok/s / 22863ms input / output No data |
小水管 API25 tests | DeepSeek V4 Flash speed / latency 83 tok/s / 5114ms input / output No data | GLM-5.1 speed / latency 37 tok/s / 20151ms input / output No data |
阿里云百炼 DashScope25 tests | DeepSeek V4 Flash speed / latency 108 tok/s / 3324ms input / output No data | GLM-5.1 speed / latency 45 tok/s / 14244ms input / output No data |
DeepSeek V4 Flash deepseek-ai/deepseek-v4-flash speed / latency No data input / output $0/M / $0/M | GLM-5.1 glm-5.1 speed / latency No data input / output $0.050/M / $0.050/M | |
DeepSeek V4 Flash deepseek-v4-flash speed / latency No data input / output $0/M / $0/M | GLM-5.1 z-ai/glm-5.1 speed / latency No data input / output $375.00/M / $375.00/M | |
DeepSeek V4 Flash deepseek-ai/deepseek-v4-flash speed / latency No data input / output $0/M / $0/M | GLM-5.1 glm-5.1 speed / latency No data input / output $3.65/M / $11.68/M | |
DeepSeek V4 Flash deepseek-v4-flash-nothinking speed / latency No data input / output $75.00/M / $75.00/M | GLM-5.1 glm-5.1 speed / latency No data input / output $0/M / $0/M |
This report only uses LMSpeed data for DeepSeek V4 Flash and GLM-5.1: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Guidance | DeepSeek V4 Flash | GLM-5.1 |
|---|---|---|
| When to choose each model | DeepSeek V4 Flash DeepSeek V4 Flash is stronger when you prioritize Average speed, First-token latency, Free providers, Provider coverage, Recent tests. | GLM-5.1 GLM-5.1 is stronger when you prioritize Cheapest input price. |
TL;DR: DeepSeek V4 Flash leads across 108 verifiable data points, including pricing, speed, latency, benchmarks, and provider examples.
Continue from DeepSeek V4 Flash vs GLM-5.1 into nearby model comparisons with enough verified LMSpeed data.
Rankings are based on community-submitted tests and periodic health probes. Advisory only, not official data.
