Compare · ModelsLive · 2 picked · head to head
GLM 4.5 vs GPT-5.5 Pro
Side by side · benchmarks, pricing, and signals you can act on.
Winner summary
GPT-5.5 Pro wins on 0/0 benchmarks
Not enough overlapping benchmarks to declare a winner yet · GLM 4.5 · GPT-5.5 Pro are still filling in scores.
Hype vs Reality
Attention vs performance
GLM 4.5
#20 by perf·no signal
GPT-5.5 Pro
#1 by perf·no signal
Best value
GLM 4.5
59.1x better value than GPT-5.5 Pro
GLM 4.5
49.4 pts/$
$1.40/M
GPT-5.5 Pro
0.8 pts/$
$105.00/M
Vendor risk
Who is behind the model
z-ai
private · undisclosed
OpenAI
$840.0B·Tier 1
Pricing · per 1M tokens · projected $/mo at 10M tokens
| Model | Input | Output | Context | Projected $/mo |
|---|---|---|---|---|
| $0.60 | $2.20 | 131K tokens (~66 books) | $10.00 | |
| $30.00 | $180.00 | 400K tokens (~200 books) | $675.00 |