When you point Claude Code at a cheaper model, you face a fork: go through an aggregator like OpenRouter, or connect directly to the provider’s API. Both work, and the right choice depends on whether you value convenience and breadth (OpenRouter) or lowest cost and provider-specific perks (direct). This compares them honestly.
For the routing tool that makes either work, see Claude Code Router setup.
The two approaches
OpenRouter vs direct API
| OpenRouter | One key, many models, failover; slight premium; extra hop |
|---|---|
| Direct API | Cheapest; provider discounts; sometimes no proxy needed |
OpenRouter is an aggregator: one account and key give you hundreds of models behind a single endpoint, with model switching and failover. Direct means signing up with each provider (DeepSeek, GLM, Kimi) and using their endpoint and key.
Cost
Direct is cheaper. OpenRouter passes through provider pricing and may add a margin, so you pay a little for the convenience layer. For a committed setup on one model, direct to DeepSeek or GLM is the lowest cost — and it unlocks provider-specific discounts like cache hits and off-peak windows that an aggregator may not pass through cleanly.
Convenience and breadth
OpenRouter wins here. One key across many models is genuinely convenient, especially when experimenting — you can try DeepSeek, Kimi, and a dozen others without separate signups. Switching models is trivial. Through Claude Code Router, you add OpenRouter once and reach everything:
{
"Providers": [
{
"name": "openrouter",
"api_base_url": "https://openrouter.ai/api/v1/chat/completions",
"api_key": "$OPENROUTER_API_KEY",
"models": ["deepseek/deepseek-chat", "moonshotai/kimi-k2"],
"transformer": { "use": ["openrouter"] }
}
],
"Router": { "default": "openrouter,deepseek/deepseek-chat" }
}Failover and reliability
OpenRouter can route around a provider outage by falling back to another host of the same model — useful if uptime matters and you don’t want to manage it. Direct gives you no automatic failover, though tools like claude-code-mux add it across direct providers.
Privacy
Direct keeps the chain shorter — your requests go straight to the provider. OpenRouter adds one more party to the path. For sensitive code, fewer hops is better; for the most privacy, a local model keeps everything on your machine. Review each party’s data policy either way.
How to choose
- Experimenting across many models? OpenRouter — one key, easy switching.
- Committed to one cheap model, want lowest cost? Direct API.
- Need provider discounts (cache, off-peak)? Direct.
- Want failover without managing it? OpenRouter.
- Sensitive code? Direct or local.
OpenRouter vs direct decision
- Lowest cost + provider discounts → direct
- One key + many models + failover → OpenRouter
- Sensitive code → direct or local
- Experimenting → OpenRouter
- Committed setup → direct (add OpenRouter as backup)
Wrapping up
OpenRouter and direct APIs both power Claude Code through a router; the trade is convenience versus cost. OpenRouter gives one key, many models, and failover for a small premium and an extra hop. Direct is cheapest, unlocks provider discounts, and keeps the chain short for privacy. Many people use both — direct for the main model, OpenRouter for breadth.
For the cost detail, see cheapest AI coding API in 2026; for failover across direct providers, claude-code-mux.
