Data points: 164
Model compare
The readout for DeepSeek V4 Flash and GLM-5.1, before the detailed comparison sheet.
Weighted outcome: GLM-5.1. Benchmark capability categories carry 80%, while price, API performance, and availability carry 20%.
Decision read
GLM-5.1
GLM-5.1 has the higher weighted result; Model A / B score 20 to 80.
Evidence depth
164 data points
Includes 34 benchmark rows, 6 audit samples, and 9 provider examples.
Selection signal
Start with GLM-5.1
The charts below split 49 high-signal samples across speed, scores, and audit health.
Switch either side of this report to compare another model with the same LMSpeed data pipeline.
Select a different model to open a new comparison URL.
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.
| Model compare | DeepSeek V4 Flash | GLM-5.1 |
|---|---|---|
| Overall leader | Contender | Leading |
| Weighted overall score | 20.0 pts | 80.0 pts |
| Benchmark category leads | 0 categories | 6 categories |
| Operational advantages | Cheapest input price, Average speed, First-token latency, Free providers, Provider coverage | No data |
| Context window | 1.0M tokens | 204.8K tokens |
| Max output | 393.2K tokens | 128K tokens |
| Modalities | Input Text Output Text | Input Text Output Text |
| Features | Text inputText outputTool callingStructured outputsJSON modeReasoning | Text inputText outputTool callingStructured outputsJSON modeReasoning |
The overall result weights benchmark capability categories at 80% and price, API speed/latency, and availability at 20%. Recent test volume does not affect the winner, and missing benchmark categories are excluded.
| Model compare | DeepSeek V4 Flash | GLM-5.1 |
|---|---|---|
| Developer | DeepSeek | Z.ai |
| Released | Apr 2026 | Apr 2026 |
| Parameters | No data | No data |
| Tokenizer | DeepSeek | Other |
| Knowledge cutoff | No data | No data |
| OpenRouter ID | deepseek/deepseek-v4-flash | z-ai/glm-5.1 |
| References | No data | No data |
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.
DeepSeek V4 Flash
DeepSeek V4 Flash has these operational advantages: Cheapest input price, Average speed, First-token latency, Free providers, Provider coverage.
GLM-5.1
GLM-5.1 leads these benchmark categories: Agents, Coding, Reasoning, Knowledge, Math.
Third-party benchmark profile synced into LMSpeed; only metrics available for both models are shown.
Compare benchmark category scores on a 0-100 scale. Select a category to inspect the gap.
Avg. score
DeepSeek V4 Flash
45.4
Avg. score
GLM-5.1
54.4
GLM-5.1 leads by 6.8
GLM-5.1 leads by 10.2
GLM-5.1 leads by 2.7
GLM-5.1 leads by 17.9
GLM-5.1 leads by 15.1
No data
No data
GLM-5.1 leads by 1.1
Metric-level scores with benchmark source, rank depth, confidence, error, and evaluation date where available.
DeepSeek V4 Flash
56.0
Rank #41/84 · confidence 2 · eval date 2026-04-24
GLM-5.1
winner63.0
Rank #25/84 · confidence 2 · eval date 2026-04-07
DeepSeek V4 Flash
winner$0.280/M
Rank #7/162 · confidence 4
GLM-5.1
$4.40/M
Rank #97/162 · confidence 4
DeepSeek V4 Flash
winner$0.175/M
Rank #12/162 · confidence 4
GLM-5.1
$2.13/M
Rank #103/162 · confidence 4
DeepSeek V4 Flash
winner$0.140/M
Rank #17/162 · confidence 4
GLM-5.1
$1.38/M
Rank #116/162 · confidence 4
DeepSeek V4 Flash
winner7.1
Rank #29/73 · confidence 2 · eval date 2026-04-24
GLM-5.1
4.6
Rank #37/73 · confidence 2 · eval date 2026-04-07
DeepSeek V4 Flash
86.7%
Rank #36/188 · confidence 4
GLM-5.1
winner86.8%
Rank #35/188 · confidence 4
DeepSeek V4 Flash
27.8%
Rank #36/187 · confidence 4
GLM-5.1
winner28.0%
Rank #35/187 · confidence 4
DeepSeek V4 Flash
winner63.0
Rank #53/89 · confidence 2 · eval date 2026-04-24
GLM-5.1
62.3
Rank #55/89 · confidence 2 · eval date 2026-04-07
DeepSeek V4 Flash
46.8
Rank #47/65 · confidence 2 · eval date 2026-04-24
GLM-5.1
winner62.7
Rank #12/65 · confidence 2 · eval date 2026-04-07
DeepSeek V4 Flash
52.6
Rank #31/37 · confidence 2 · eval date 2026-04-24
GLM-5.1
winner58.4
Rank #14/37 · confidence 2 · eval date 2026-04-07
DeepSeek V4 Flash
winner56.2
Rank #23/59 · confidence 2 · eval date 2026-04-24
GLM-5.1
55.8
Rank #27/59 · confidence 2 · eval date 2026-04-07
DeepSeek V4 Flash
42.0%
Rank #52/185 · confidence 4
GLM-5.1
winner43.8%
Rank #39/185 · confidence 4
DeepSeek V4 Flash
winner44.9
Rank #41/96 · confidence 2 · eval date 2026-04-24
GLM-5.1
43.8
Rank #42/96 · confidence 2 · eval date 2026-04-07
DeepSeek V4 Flash
winner94.8
Rank #3/14 · confidence 2 · eval date 2026-04-24
GLM-5.1
82.6
Rank #14/14 · confidence 2 · eval date 2026-04-07
DeepSeek V4 Flash
winner81.6
Rank #6/56 · confidence 2 · eval date 2026-04-24
GLM-5.1
64.6
Rank #18/56 · confidence 2 · eval date 2026-04-07
DeepSeek V4 Flash
winner95.8
Rank #1/90 · confidence 2 · eval date 2026-04-24
GLM-5.1
29.4
Rank #83/90 · confidence 2 · eval date 2026-04-07
DeepSeek V4 Flash
60.1
Rank #40/55 · confidence 2 · eval date 2026-04-24
GLM-5.1
winner77.6
Rank #15/55 · confidence 2 · eval date 2026-04-07
DeepSeek V4 Flash
winner88.1
Rank #18/24 · confidence 2 · eval date 2026-04-24
GLM-5.1
86.2
Rank #22/24 · confidence 2 · eval date 2026-04-07
DeepSeek V4 Flash
winner89.4
Rank #27/96 · confidence 2 · eval date 2026-04-24
GLM-5.1
86.8
Rank #38/96 · confidence 2 · eval date 2026-04-07
DeepSeek V4 Flash
winner32.1
Rank #27/96 · confidence 2 · eval date 2026-04-24
GLM-5.1
28.0
Rank #35/96 · confidence 2 · eval date 2026-04-07
DeepSeek V4 Flash
winner40.3
Rank #27/99 · confidence 2 · eval date 2026-04-24
GLM-5.1
40.2
Rank #28/99 · confidence 2 · eval date 2026-04-07
DeepSeek V4 Flash
winner37.2
Rank #33/90 · confidence 2 · eval date 2026-04-24
GLM-5.1
24.2
Rank #62/90 · confidence 2 · eval date 2026-04-07
DeepSeek V4 Flash
1233.0
Rank #33/66 · confidence 2 · eval date 2026-04-24
GLM-5.1
winner1299.0
Rank #14/66 · confidence 2 · eval date 2026-04-07
DeepSeek V4 Flash
winner79.2
Rank #5/86 · confidence 2 · eval date 2026-04-24
GLM-5.1
76.3
Rank #13/86 · confidence 2 · eval date 2026-04-07
DeepSeek V4 Flash
95.0
Rank #19/84 · confidence 2 · eval date 2026-04-24
GLM-5.1
winner97.7
Rank #7/84 · confidence 2 · eval date 2026-04-07
DeepSeek V4 Flash
57.8
Rank #17/28 · confidence 2 · eval date 2026-04-24
GLM-5.1
winner62.3
Rank #10/28 · confidence 2 · eval date 2026-04-07
DeepSeek V4 Flash
54.4
Rank #18/50 · confidence 2 · eval date 2026-04-24
GLM-5.1
winner60.1
Rank #12/50 · confidence 2 · eval date 2026-04-07
DeepSeek V4 Flash
69.0
Rank #14/23 · confidence 2 · eval date 2026-04-24
GLM-5.1
winner71.8
Rank #12/23 · confidence 2 · eval date 2026-04-07
DeepSeek V4 Flash
winner31.1
Rank #16/55 · confidence 2 · eval date 2026-04-24
GLM-5.1
29.9
Rank #22/55 · confidence 2 · eval date 2026-04-07
DeepSeek V4 Flash
winner73.2
Rank #17/25 · confidence 2 · eval date 2026-04-24
GLM-5.1
68.0
Rank #18/25 · confidence 2 · eval date 2026-04-07
DeepSeek V4 Flash
1189.0
Rank #21/55 · confidence 2 · eval date 2026-04-24
GLM-5.1
winner1256.0
Rank #18/55 · confidence 2 · eval date 2026-04-07
DeepSeek V4 Flash
34.4
Rank #21/50 · confidence 2 · eval date 2026-04-24
GLM-5.1
winner37.8
Rank #18/50 · confidence 2 · eval date 2026-04-07
DeepSeek V4 Flash
56.9
Rank #32/46 · confidence 2 · eval date 2026-04-24
GLM-5.1
winner63.5
Rank #24/46 · confidence 2 · eval date 2026-04-07
DeepSeek V4 Flash
46.7
Rank #37/53 · confidence 2 · eval date 2026-04-24
GLM-5.1
winner48.9
Rank #34/53 · confidence 2 · eval date 2026-04-07
Latest completed audits from shared providers, with four safety and integrity score groups plus report links.
| Provider | DeepSeek V4 Flash | GLM-5.1 |
|---|---|---|
ChooseC APIWinner: GLM-5.1 | DeepSeek V4 Flash deepseek-v4-flash No audit yet | GLM-5.1 glm-5.1 Audit score 97 10010086100 |
AutoRouterWinner: DeepSeek V4 Flash | DeepSeek V4 Flash deepseek-v4-flash Audit score 93 1008486100 | GLM-5.1 glm-5.1 No audit yet |
向量引擎Winner: DeepSeek V4 Flash | DeepSeek V4 Flash deepseek-v4-flash Audit score 92 1008484100 | GLM-5.1 glm-5.1 No audit yet |
YUNWU APIWinner: DeepSeek V4 Flash | DeepSeek V4 Flash deepseek-v4-flash Audit score 85 846886100 | 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-5.1-20260408 No audit yet |
小水管 APIWinner: DeepSeek V4 Flash | DeepSeek V4 Flash deepseek-v4-flash Audit score 83 807280100 | GLM-5.1 glm-5.1 No audit yet |
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 |
|---|---|---|
OpenCode70 tests | DeepSeek V4 Flash speed / latency 59 tok/s / 29380ms input / output No data | GLM-5.1 speed / latency N/A / N/A input / output No data |
NVIDIA NIM65 tests | DeepSeek V4 Flash speed / latency 24 tok/s / 13618ms input / output No data | GLM-5.1 speed / latency 82 tok/s / 9309ms 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 |
DeepSeek V4 Flash deepseek-ai/deepseek-v4-flash speed / latency No data input / output $0/request | GLM-5.1 glm-5.1 speed / latency No data input / output $0.050/request | |
DeepSeek V4 Flash deepseek-v4-flash speed / latency No data input / output $0.012/M/$0.023/M | GLM-5.1 glm-5.1 speed / latency No data input / output $0/M/$0/M | |
DeepSeek V4 Flash 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/M/$0/M | |
DeepSeek V4 Flash 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 $0.096/M/$0.301/M |
Weighted outcome: GLM-5.1. Benchmark capability categories carry 80%, while price, API performance, and availability carry 20%.
