GPT-5.3 Chat vs Sonar Reasoning Pro
OpenAI vs Perplexity — benchmarks, pricing, and capabilities side by side.
- •GPT-5.3 Chat is cheaper ($1.75 vs $2.00 per 1M input)
| GPT-5.3 Chat | Sonar Reasoning Pro | |
|---|---|---|
| Intelligence index | — | 95.7 |
| Developer | OpenAI | Perplexity |
| Type | Multimodal | Multimodal |
| Access | API only | API only |
| Context window | 128,000 tokens | 128,000 tokens |
| Input price | $1.75 / 1M | $2.00 / 1M |
| Output price | $14.00 / 1M | $8.00 / 1M |
| Speed | — | — |
| Released | March 3, 2026 | March 7, 2025 |
| Parameters | — | — |
| Input modalities | Text, Image | Text, Image |
| Output modalities | Text | Text |