Compare · ModelsLive · 2 picked · head to head
GLM 5.2 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 5.2 · GPT-5.5 Pro are still filling in scores.
Hype vs Reality
Attention vs performance
GLM 5.2
#11 by perf·no signal
GPT-5.5 Pro
#1 by perf·no signal
Best value
GLM 5.2
36.5x better value than GPT-5.5 Pro
GLM 5.2
30.5 pts/$
$2.50/M
GPT-5.5 Pro
0.8 pts/$
$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 |
|---|---|---|---|---|
| $1.00 | $4.00 | 1.0M tokens (~524 books) | $17.50 | |
| $30.00 | $180.00 | 400K tokens (~200 books) | $675.00 |