Data points: 101
Model compare
The readout for GLM-4.7 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 4 to 96.
Evidence depth
101 data points
Includes 10 benchmark rows, 3 audit samples, and 9 provider examples.
Selection signal
Start with GLM-5.1
The charts below split 22 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 GLM-4.7 Flash and GLM-5.1: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Model compare | GLM-4.7 Flash | GLM-5.1 |
|---|---|---|
| Overall leader | Contender | Leading |
| Weighted overall score | 4.0 pts | 96.0 pts |
| Benchmark category leads | 0 categories | 2 categories |
| Operational advantages | Average speed | Cheapest input price, First-token latency, Free providers, Provider coverage |
| Context window | 200K tokens | 202.8K tokens |
| Max output | 131.1K tokens | 128K tokens |
| Modalities | Input Text Output Text | Input Text |
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 | GLM-4.7 Flash | GLM-5.1 |
|---|---|---|
| Developer | Z.ai | Z.ai |
| Released | Jan 2026 | Apr 2026 |
| Parameters | No data | No data |
| Tokenizer | Other | Other |
| Knowledge cutoff | No data | No data |
| OpenRouter ID | z-ai/glm-4.7-flash | z-ai/glm-5.1 |
| References | No data | No data |
This report only uses LMSpeed data for GLM-4.7 Flash and GLM-5.1: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
GLM-4.7 Flash
GLM-4.7 Flash has these operational advantages: Average speed.
GLM-5.1
GLM-5.1 is stronger in benchmark categories (Coding, Reasoning) and operational dimensions (Cheapest input price, First-token latency, Free providers, Provider coverage).
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
GLM-4.7 Flash
41.5
Avg. score
GLM-5.1
55.1
GLM-5.1
GLM-5.1 leads by 13.3
GLM-5.1 leads by 13.6
GLM-5.1
GLM-5.1
No data
No data
GLM-5.1
Metric-level scores with benchmark source, rank depth, confidence, error, and evaluation date where available.
GLM-4.7 Flash
11.0
Rank #116/127 · confidence 1 · eval date 2025-10-01
GLM-5.1
winner67.0
Rank #39/127 · confidence 3 · eval date 2026-04-07
GLM-4.7 Flash
winner0.92 s
Rank #46/139 · confidence 4
GLM-5.1
0.93 s
Rank #48/139 · confidence 4
GLM-4.7 Flash
winner84.7 tok/s
Rank #73/139 · confidence 4
GLM-5.1
65.7 tok/s
Rank #88/139 · confidence 4
GLM-4.7 Flash
winner24.52 s
Rank #97/139 · confidence 4
GLM-5.1
58.62 s
Rank #125/139 · confidence 4
GLM-4.7 Flash
winner$0.070/M
Rank #5/163 · confidence 4
GLM-5.1
$1.40/M
Rank #118/163 · confidence 4
GLM-4.7 Flash
winner$0.153/M
Rank #11/163 · confidence 4
GLM-5.1
$2.15/M
Rank #105/163 · confidence 4
GLM-4.7 Flash
winner$0.400/M
Rank #13/163 · confidence 4
GLM-5.1
$4.40/M
Rank #99/163 · confidence 4
GLM-4.7 Flash
58.1%
Rank #147/187 · confidence 4
GLM-5.1
winner86.8%
Rank #34/187 · confidence 4
GLM-4.7 Flash
7.1%
Rank #111/186 · confidence 4
GLM-5.1
winner28.0%
Rank #34/186 · confidence 4
GLM-4.7 Flash
33.7%
Rank #118/184 · confidence 4
GLM-5.1
winner43.8%
Rank #38/184 · confidence 4
Latest completed audits from shared providers, with four safety and integrity score groups plus report links.
| Provider | GLM-4.7 Flash | GLM-5.1 |
|---|---|---|
Winner: GLM-5.1 | GLM-4.7 Flash glm-4.7-flash No audit yet | GLM-5.1 glm-5.1 Audit score 97 10010086100 |
Winner: GLM-5.1 | GLM-4.7 Flash glm-4.7-flash-free No audit yet | GLM-5.1 glm-5.1-free Audit score 81 727280100 |
Winner: GLM-5.1 | GLM-4.7 Flash zhipu/glm-4.7-flash No audit yet | GLM-5.1 z-ai/glm-5.1 Audit score 78 70728088 |
Speed aggregates and input/output pricing share each provider row for real API selection and migration cost checks.
| Provider | GLM-4.7 Flash | GLM-5.1 |
|---|---|---|
80 tests | GLM-4.7 Flash speed / latency 65 tok/s / 19728ms input / output No data | GLM-5.1 speed / latency 35 tok/s / 17508ms input / output No data |
15 tests | GLM-4.7 Flash speed / latency N/A / N/A input / output No data | GLM-5.1 speed / latency 58 tok/s / 14051ms input / output No data |
10 tests | GLM-4.7 Flash speed / latency N/A / N/A input / output No data | GLM-5.1 speed / latency 42 tok/s / 15344ms input / output No data |
10 tests | GLM-4.7 Flash speed / latency 34 tok/s / 1567ms input / output No data | GLM-5.1 speed / latency 22 tok/s / 9579ms input / output No data |
5 tests | GLM-4.7 Flash speed / latency N/A / N/A input / output No data | GLM-5.1 speed / latency 148 tok/s / 5296ms input / output No data |
GLM-4.7 Flash glm-4.7-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 | |
GLM-4.7 Flash glm-4.7-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 | |
GLM-4.7 Flash glm-4.7-flash-free speed / latency No data input / output $0/request | GLM-5.1 glm-5.1-free speed / latency No data input / output $0.015/request | |
GLM-4.7 Flash glm-4.7-flash speed / latency No data input / output $0.0062/M/$0.036/M | GLM-5.1 glm-5.1 speed / latency No data input / output $0.096/M |
Weighted outcome: GLM-5.1. Benchmark capability categories carry 80%, while price, API performance, and availability carry 20%.
Output
| Features | Text inputText outputTool callingStructured outputsJSON modeReasoning | Text inputText outputTool callingStructured outputsJSON modeReasoning |
|---|
