GLM 5.1 vs Sonar Reasoning Pro
Zhipu AI vs Perplexity — benchmarks, pricing, and capabilities side by side.
- •Sonar Reasoning Pro has the higher intelligence index (95.7 vs 86.8)
- •GLM 5.1 is cheaper ($0.98 vs $2.00 per 1M input)
- •GLM 5.1 has a larger context window (203K)
| GLM 5.1 | Sonar Reasoning Pro | |
|---|---|---|
| Intelligence index | 86.8 | 95.7 |
| Developer | Zhipu AI | Perplexity |
| Type | LLM | Multimodal |
| Access | Open weights | API only |
| Context window | 202,752 tokens | 128,000 tokens |
| Input price | $0.98 / 1M | $2.00 / 1M |
| Output price | $3.08 / 1M | $8.00 / 1M |
| Speed | 53 tok/s | — |
| Released | April 7, 2026 | March 7, 2025 |
| Parameters | — | — |
| Input modalities | Text | Text, Image |
| Output modalities | Text | Text |