Comparisons6 min read
Best LLM routers in 2026
A gateway reaches many models; a router decides which one each request should use. That decision — made well — is where the cost, quality, and reliability wins come from. Here's how the leading options approach it.
What separates a good router
- Objective-driven — optimizes each request (e.g. cheapest above a quality floor), not just a static preference order
- Health-aware — routes around providers that are flapping or slow
- Explainable — shows why it chose what it chose
- Governed — respects budgets, residency, and per-key model limits
The options
| Router | How it routes | Best for |
|---|---|---|
| Neural Router | Cost/quality/latency optimizer + receipts | Production teams needing auditable routing |
| OpenRouter | Price/availability-based | Broad model access |
| LiteLLM | Rules you configure | Self-hosted control |
| Portkey | Configurable strategies + observability | Monitoring-led teams |
For deeper looks, see LiteLLM vs Neural Router, Neural Router vs Portkey, and the best LLM gateways roundup.
The capability to weigh most heavily is whether the router can prove its decisions. In production, "it picked a model" isn't enough — you need to see the candidates, the scores, and whether a cheaper path would have kept quality.