gpt-oss-20b vs Sonar Reasoning Pro
OpenAI vs Perplexity — benchmarks, pricing, and capabilities side by side.
- •Sonar Reasoning Pro has the higher intelligence index (95.7 vs 73.6)
- •gpt-oss-20b is cheaper ($0.03 vs $2.00 per 1M input)
- •gpt-oss-20b has a larger context window (131K)
| gpt-oss-20b | Sonar Reasoning Pro | |
|---|---|---|
| Intelligence index | 73.6 | 95.7 |
| Developer | OpenAI | Perplexity |
| Type | LLM | Multimodal |
| Access | Open weights | API only |
| Context window | 131,072 tokens | 128,000 tokens |
| Input price | $0.03 / 1M | $2.00 / 1M |
| Output price | $0.14 / 1M | $8.00 / 1M |
| Speed | 1000 tok/s | — |
| Released | August 5, 2025 | March 7, 2025 |
| Parameters | 21B (3.6B active) | — |
| Input modalities | Text | Text, Image |
| Output modalities | Text | Text |