DeepSeek V3.1 Terminus vs Sonar Reasoning Pro
DeepSeek vs Perplexity — benchmarks, pricing, and capabilities side by side.
- •Sonar Reasoning Pro has the higher intelligence index (95.7 vs 83.5)
- •DeepSeek V3.1 Terminus is cheaper ($0.27 vs $2.00 per 1M input)
- •DeepSeek V3.1 Terminus has a larger context window (164K)
| DeepSeek V3.1 Terminus | Sonar Reasoning Pro | |
|---|---|---|
| Intelligence index | 83.5 | 95.7 |
| Developer | DeepSeek | Perplexity |
| Type | LLM | Multimodal |
| Access | Open weights | API only |
| Context window | 163,840 tokens | 128,000 tokens |
| Input price | $0.27 / 1M | $2.00 / 1M |
| Output price | $0.95 / 1M | $8.00 / 1M |
| Speed | — | — |
| Released | September 22, 2025 | March 7, 2025 |
| Parameters | — | — |
| Input modalities | Text | Text, Image |
| Output modalities | Text | Text |