Compare · ModelsLive · 2 picked · head to head
GLM 4.5 vs GPT-5 Chat
Side by side · benchmarks, pricing, and signals you can act on.
Winner summary
GPT-5 Chat wins on 1/1 benchmarks
GPT-5 Chat wins 1 of 1 shared benchmarks. Leads in arena.
Category leads
arena·GPT-5 Chat
Hype vs Reality
Attention vs performance
GLM 4.5
#18 by perf·no signal
GPT-5 Chat
#1 by perf·#1 by attention
Best value
GLM 4.5
3.4x better value than GPT-5 Chat
GLM 4.5
49.4 pts/$
$1.40/M
GPT-5 Chat
14.6 pts/$
$5.63/M
Vendor risk
Who is behind the model
z-ai
private · undisclosed
OpenAI
$840.0B·Tier 1
Head to head
1 benchmark · 2 models
GLM 4.5GPT-5 Chat
Chatbot Arena Elo · Overall
GPT-5 Chat leads by +15.1
GLM 4.5
1410.9
GPT-5 Chat
1426.0
Full benchmark table
| Benchmark | GLM 4.5 | GPT-5 Chat |
|---|---|---|
Chatbot Arena Elo · Overall | 1410.9 | 1426.0 |
Pricing · per 1M tokens · projected $/mo at 10M tokens
| Model | Input | Output | Context | Projected $/mo |
|---|---|---|---|---|
| GLM 4.5 | $0.60 | $2.20 | 131K tokens (~66 books) | $10.00 |
| GPT-5 Chat | $1.25 | $10.00 | 128K tokens (~64 books) | $34.38 |