Compare · ModelsLive · 2 picked · head to head
GLM 5.1 vs GLM 5
Side by side · benchmarks, pricing, and signals you can act on.
Winner summary
GLM 5.1 wins on 7/9 benchmarks
GLM 5.1 wins 7 of 9 shared benchmarks. Leads in arena · coding · language.
Category leads
arena·GLM 5.1coding·GLM 5.1reasoning·GLM 5language·GLM 5.1math·GLM 5.1knowledge·GLM 5.1
Hype vs Reality
Attention vs performance
GLM 5.1
#14 by perf·no signal
GLM 5
#53 by perf·#27 by attention
Best value
GLM 5
1.1x better value than GLM 5.1
GLM 5.1
34.2 pts/$
$2.05/M
GLM 5
38.1 pts/$
$1.51/M
Vendor risk
Who is behind the model
z-ai
private · undisclosed
z-ai
private · undisclosed
Head to head
9 benchmarks · 2 models
GLM 5.1GLM 5
Chatbot Arena Elo · Overall
GLM 5.1 leads by +11.9
GLM 5.1
1467.4
GLM 5
1455.6
LiveBench · Agentic Coding
GLM 5.1
55.0
GLM 5
55.0
LiveBench · Coding
GLM 5.1 leads by +1.7
GLM 5.1
75.4
GLM 5
73.6
LiveBench · Data Analysis
GLM 5 leads by +4.7
GLM 5.1
63.2
GLM 5
67.9
LiveBench · If
GLM 5.1 leads by +13.1
GLM 5.1
68.5
GLM 5
55.3
LiveBench · Language
GLM 5 leads by +5.8
GLM 5.1
71.8
GLM 5
77.5
LiveBench · Mathematics
GLM 5.1 leads by +1.4
GLM 5.1
84.9
GLM 5
83.5
LiveBench · Overall
GLM 5.1 leads by +1.3
GLM 5.1
70.2
GLM 5
68.8
LiveBench · Reasoning
GLM 5.1 leads by +3.4
GLM 5.1
72.5
GLM 5
69.1
Full benchmark table
| Benchmark | GLM 5.1 | GLM 5 |
|---|---|---|
Chatbot Arena Elo · Overall | 1467.4 | 1455.6 |
LiveBench · Agentic Coding | 55.0 | 55.0 |
LiveBench · Coding | 75.4 | 73.6 |
LiveBench · Data Analysis | 63.2 | 67.9 |
LiveBench · If | 68.5 | 55.3 |
LiveBench · Language | 71.8 | 77.5 |
LiveBench · Mathematics | 84.9 | 83.5 |
LiveBench · Overall | 70.2 | 68.8 |
LiveBench · Reasoning | 72.5 | 69.1 |
Pricing · per 1M tokens · projected $/mo at 10M tokens