GPT-3.5 Turbo 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 35.2)
- •GPT-3.5 Turbo is cheaper ($0.50 vs $2.00 per 1M input)
- •Sonar Reasoning Pro has a larger context window (128K)
| GPT-3.5 Turbo | Sonar Reasoning Pro | |
|---|---|---|
| Intelligence index | 35.2 | 95.7 |
| Developer | OpenAI | Perplexity |
| Type | LLM | Multimodal |
| Access | API only | API only |
| Context window | 16,385 tokens | 128,000 tokens |
| Input price | $0.50 / 1M | $2.00 / 1M |
| Output price | $1.50 / 1M | $8.00 / 1M |
| Speed | 100 tok/s | — |
| Released | March 1, 2023 | March 7, 2025 |
| Parameters | — | — |
| Input modalities | Text | Text, Image |
| Output modalities | Text | Text |
Shared benchmarks
GPT-3.5 Turbo
Sonar Reasoning Pro
MATH-500
44.1
95.7