R1 1776 vs Step 3.5 Flash 2603
Perplexity vs StepFun — benchmarks, pricing, and capabilities side by side.
- •R1 1776 has the higher intelligence index (95.4 vs 82.6)
| R1 1776 | Step 3.5 Flash 2603 | |
|---|---|---|
| Intelligence index | 95.4 | 82.6 |
| Developer | Perplexity | StepFun |
| Type | LLM | LLM |
| Access | — | — |
| Context window | — | — |
| Input price | $0.00 / 1M | $0.00 / 1M |
| Output price | $0.00 / 1M | $0.00 / 1M |
| Speed | — | 197 tok/s |
| Released | February 18, 2025 | April 2, 2026 |
| Parameters | — | — |
| Input modalities | — | — |
| Output modalities | — | — |