Compare · ModelsLive · 2 picked · head to head
GLM 5 vs Step 3.5 Flash
Side by side · benchmarks, pricing, and signals you can act on.
Winner summary
GLM 5 wins on 7/7 benchmarks
GLM 5 wins 7 of 7 shared benchmarks. Leads in arena · math · knowledge.
Category leads
arena·GLM 5math·GLM 5knowledge·GLM 5language·GLM 5coding·GLM 5
Hype vs Reality
Attention vs performance
GLM 5
#53 by perf·#27 by attention
Step 3.5 Flash
#7 by perf·#11 by attention
Best value
Step 3.5 Flash
10.1x better value than GLM 5
GLM 5
38.1 pts/$
$1.51/M
Step 3.5 Flash
384.5 pts/$
$0.20/M
Vendor risk
Mixed exposure
One or more vendors flagged
z-ai
private · undisclosed
StepFun
$5.0B·Tier 1
Head to head
7 benchmarks · 2 models
GLM 5Step 3.5 Flash
Chatbot Arena Elo · Overall
GLM 5 leads by +64.2
GLM 5
1455.6
Step 3.5 Flash
1391.4
OpenCompass · AIME2025
GLM 5 leads by +0.1
GLM 5
95.8
Step 3.5 Flash
95.7
OpenCompass · GPQA-Diamond
GLM 5 leads by +1.6
GLM 5
85.3
Step 3.5 Flash
83.7
OpenCompass · HLE
GLM 5 leads by +6.5
GLM 5
28.1
Step 3.5 Flash
21.6
OpenCompass · IFEval
GLM 5
93.2
Step 3.5 Flash
93.2
OpenCompass · LiveCodeBenchV6
GLM 5 leads by +2.3
GLM 5
86.2
Step 3.5 Flash
83.9
OpenCompass · MMLU-Pro
GLM 5 leads by +1.7
GLM 5
85.2
Step 3.5 Flash
83.5
Full benchmark table
| Benchmark | GLM 5 | Step 3.5 Flash |
|---|---|---|
Chatbot Arena Elo · Overall | 1455.6 | 1391.4 |
OpenCompass · AIME2025 | 95.8 | 95.7 |
OpenCompass · GPQA-Diamond | 85.3 | 83.7 |
OpenCompass · HLE | 28.1 | 21.6 |
OpenCompass · IFEval | 93.2 | 93.2 |
OpenCompass · LiveCodeBenchV6 | 86.2 | 83.9 |
OpenCompass · MMLU-Pro | 85.2 | 83.5 |
Pricing · per 1M tokens · projected $/mo at 10M tokens
| Model | Input | Output | Context | Projected $/mo |
|---|---|---|---|---|
| GLM 5 | $0.72 | $2.30 | 80K tokens (~40 books) | $11.15 |
| Step 3.5 Flash | $0.10 | $0.30 | 262K tokens (~131 books) | $1.50 |
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