GPT-5.5 Instant vs Sonar Reasoning Pro
OpenAI vs Perplexity — benchmarks, pricing, and capabilities side by side.
- •Sonar Reasoning Pro is cheaper ($2.00 vs $5.00 per 1M input)
| GPT-5.5 Instant | Sonar Reasoning Pro | |
|---|---|---|
| Intelligence index | — | 95.7 |
| Developer | OpenAI | Perplexity |
| Type | LLM | Multimodal |
| Access | — | API only |
| Context window | — | 128,000 tokens |
| Input price | $5.00 / 1M | $2.00 / 1M |
| Output price | $30.00 / 1M | $8.00 / 1M |
| Speed | — | — |
| Released | May 5, 2026 | March 7, 2025 |
| Parameters | — | — |
| Input modalities | — | Text, Image |
| Output modalities | — | Text |