Compare · ModelsLive · 2 picked · head to head
GLM 4.5 vs GPT-5.5
Side by side · benchmarks, pricing, and signals you can act on.
Winner summary
GPT-5.5 wins on 0/0 benchmarks
Not enough overlapping benchmarks to declare a winner yet · GLM 4.5 · GPT-5.5 are still filling in scores.
Hype vs Reality
Attention vs performance
GLM 4.5
#20 by perf·no signal
GPT-5.5
#2 by perf·no signal
Best value
GLM 4.5
10.2x better value than GPT-5.5
GLM 4.5
49.4 pts/$
$1.40/M
GPT-5.5
4.9 pts/$
$17.50/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