GPT-5.4 nano 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 81.7)
- •GPT-5.4 nano is cheaper ($0.20 vs $2.00 per 1M input)
- •GPT-5.4 nano has a larger context window (400K)
| GPT-5.4 nano | Sonar Reasoning Pro | |
|---|---|---|
| Intelligence index | 81.7 | 95.7 |
| Developer | OpenAI | Perplexity |
| Type | LLM | Multimodal |
| Access | API only | API only |
| Context window | 400,000 tokens | 128,000 tokens |
| Input price | $0.20 / 1M | $2.00 / 1M |
| Output price | $1.25 / 1M | $8.00 / 1M |
| Speed | 157 tok/s | — |
| Released | March 17, 2026 | March 7, 2025 |
| Parameters | — | — |
| Input modalities | Text, Image | Text, Image |
| Output modalities | Text | Text |