GLM 5.1 vs GPT-5 Pro
Zhipu AI vs OpenAI — benchmarks, pricing, and capabilities side by side.
- •GPT-5 Pro has the higher intelligence index (88.4 vs 86.8)
- •GLM 5.1 is cheaper ($0.98 vs $15.00 per 1M input)
- •GPT-5 Pro has a larger context window (400K)
| GLM 5.1 | GPT-5 Pro | |
|---|---|---|
| Intelligence index | 86.8 | 88.4 |
| Developer | Zhipu AI | OpenAI |
| Type | LLM | LLM |
| Access | Open weights | API only |
| Context window | 202,752 tokens | 400,000 tokens |
| Input price | $0.98 / 1M | $15.00 / 1M |
| Output price | $3.08 / 1M | $120.00 / 1M |
| Speed | 53 tok/s | — |
| Released | April 7, 2026 | October 6, 2025 |
| Parameters | — | — |
| Input modalities | Text | Text, Image |
| Output modalities | Text | Text |
Shared benchmarks
GLM 5.1
GPT-5 Pro
GPQA Diamond
86.8
88.4
Humanity’s Last Exam
28
42