Pyyan / Compare / Vercel AI SDK vs OpenRouter vs LiteLLM vs Requesty
Vercel AI SDK vs OpenRouter vs LiteLLM vs Requesty
4 of 5Routers & Gateways · verified 13 Aug 2026
×OpenRouterOpenRoutercurrent
| Specification | Vercel AI SDK | OpenRouter | LiteLLM | Requesty |
|---|---|---|---|---|
| Summary | TypeScript-native provider abstraction. | Biggest catalogue, simplest start. | The self-hosted standard. | Lowest measured overhead. |
| Added latency | None | 40–55ms | Self-hosted | 8ms P50 |
| Hosting | Library | Managed | Self | Managed |
| Caching | — | — | Redis | — |
| Category | Routers & Gateways | Routers & Gateways | Routers & Gateways | Routers & Gateways |
| Official | Vercel ↗ | OpenRouter ↗ | BerriAI ↗ | Requesty ↗ |
Highlighted rows are where these differ.
OpenRouter
- Consolidated billing across every provider
- 40–55ms overhead — 5× the alternatives
Best for prototyping.
LiteLLM
- Budget controls and Redis caching
- Zero marginal cost, you run it
Best for production.