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One API for many models
The best LLM gateway for switching between model providers with one API is OpenRouter because it scores highest on our published formula (99.1/100): A hosted API that gives one key access to many models, with free models available.
The job: “I want to switch between model providers without rewriting code.” · Last checked
OpenRouter
A hosted API that gives one key access to many models, with free models available.
Not for: Teams that must keep all traffic on their own infrastructure.
Pricing: Free tier with 25+ free models; pay-as-you-go for paid models. source, checked 2026-10-19
Visit OpenRouter ↗LiteLLM
Open-source proxy and SDK you run yourself in front of any provider.
Not for: People who don't want to operate a service.
Pricing: Open source proxy/SDK; enterprise tier available. source
Score breakdown
| Tool | Fit (editorial) ×0.4 | Adoption (GitHub stars) ×0.25 | Momentum (release freshness) ×0.2 | Attention (HN, 30d) ×0.15 | Score |
|---|---|---|---|---|---|
| OpenRouter | 5/5 → 1 | n/a (closed source) | n/a | 727 pts → 0.966 | 99.1 |
| LiteLLM | 4/5 → 0.75 | 61.7k★ → 0.897 | Oct 21, 2026 → 0.999 | 3 pts → 0.203 | 75.5 |
Missing signals are dropped and the remaining weights re-normalized. See methodology. Signals fetched Oct 21, 2026.
FAQ
What is the best LLM gateway for switching between model providers with one API?
The best LLM gateway for switching between model providers with one API is OpenRouter because it scores highest on our published formula (99.1/100): A hosted API that gives one key access to many models, with free models available.
What is the best alternative to OpenRouter?
Our runner-up is LiteLLM (75.5/100). Open-source proxy and SDK you run yourself in front of any provider. Not for: People who don't want to operate a service.
Who should not use OpenRouter?
Teams that must keep all traffic on their own infrastructure.
How much does OpenRouter cost?
Free tier with 25+ free models; pay-as-you-go for paid models. (checked 2026-10-19, source: https://openrouter.ai/pricing)
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- Fine-tune open models: pick Unsloth
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